1. Open Access In Interstate Transmission system
Principal Regulation 2008( 25th Jan’2008)
Amendment Regulation 2009(20th May’2009)
Order-Removal of difficulties,(28th June,2011)
Order-Amendment to CTU procedure 28th Oct,2009
P. S.Das, Ch.Manager
ERLDC, POSOCO
4/24/2017
ERLDC: POSOCO

2. Contents Markets & Evolution-Overview Definitions Legal provisions
Regulations 2-28 & CTU procedures
Sample calculations- STOA Losses & charges
Typical State OA procedures
Contents
4/24/2017
ERLDC: POSOCO

3. Evolution of Power Market in India
Capacity
Market
Ancillary
Market PX
2008
Open Access
2004
ABT
IEGC
Feb.’2000

4. Merging of markets along with synchronization of regions
INDIA
3,287,263 sq. km area
More than 1 Billion people (2001 census)
Installed Capacity of
GW (Jan-08)
August 2006
North synchronized
With Central Grid
March 2003
West synchronized
With East & Northeast
NEW Grid
South
Grid
October 1991
East and Northeast
synchronized
Central Grid
North
East
West
Merging of markets along with synchronization of regions
Northeast
South
Five Regional Grids
Five Frequencies

5. Present Market at a Glance
Short Term Open Access
Medium Term Market
Long Term Market
Bilateral Transaction
Contingency Transaction
Collective Transaction
Day Ahead Transaction
12-25 Yr
3months
-3Years
3 month
ahead
Day Ahead
ahead
After Clearance of PX
On the day of operation
Term
ahead
Schedules
Balancing Market ( UI )
( Real Time Operation )

7. DEFINITION OF “OPEN ACCESS” IN THE ELECTRICITY ACT, 2003
. “Open Access” means the non-discriminatory provision for the use of transmission lines or distribution system or associated facilities with such lines or system by any licensee, or consumer, or a person engaged in generation in accordance with the regulations specified by the Appropriate Commission”.
Section 2(47) of Electricity Act 2003

8. LEGAL FRAMEWORK [SECTION-9(2)]
Every person, who has constructed a captive generating plant and maintains and operates such plant, shall have the right to open access for the purposes of carrying electricity from his captive generating plant to the destination of his use
Provided that such open access shall be subject to availability of adequate transmission facility and such availability of transmission facility shall be determined by the Central Transmission Utility or the State Transmission Utility, as the case may be

9. Legal Framework(Sections 38/39/40/42)
CTU / STU/ Distribution licensee / Transmission licensee-functions & duties
To provide non-discriminatory open access to its transmission system for use by-
(i) any licensee or generating company on payment of the transmission charges; or
(ii) any consumer as and when such open access is provided by the State Commission under sub-section (2) of section 42, on payment of the transmission charges and a surcharge thereon, as may be specified by the Central Commission:.
CTU can not engage in generation/trading.
STU can not engage in trading
Transmission Licensee can not engage in trading

10. Regulation 2: Definitions
“bilateral transaction” means a transaction for exchange of energy (MWh) between a specified buyer and a specified seller, directly or through a trading licensee or discovered at power exchange through anonymous bidding, from a specified point of injection to a specified point of drawl for a fixed or varying quantum of power (MW) for any time period during a month
“collective transaction” means a set of transactions discovered in power exchange through anonymous, simultaneous competitive bidding by buyers and sellers;
“regional entity” means a person whose metering and energy accounting is done at the regional level;
“intra-State entity” means a person whose metering and energy accounting is done by the State Load Despatch Centre or by any other authorized State utility;

11. Regulation 2: Definitions….contd
“short-term customer” means a person who has availed or intends to avail short term open access
“short-term open access” means open access for a period up to one (1)month at one time
“regional entity” means a person whose metering and energy accounting is done at the regional level;
Short term market means a market with contracts for a period not exceeding one year
from :: Power markets 2010 Regs
Short term access applications allowed upto 3 months in advance considering visibility & ATC/TTC issues.

12. Regulation 2: Definitions….contd
“State network” means network owned by the State Transmission Utility, distribution licensee or any other person granted licence by the State Commission to construct, operate and maintain the transmission system;
“State utility” means a State Transmission Utility, or a State Electricity Board,or Electricity Department of the State, or a State Government organization authorized to sell or purchase electricity on behalf of the State;
“time block” means 15 minutes time period specified in the Grid Code for the purposes of scheduling and despatch; and

13. Regulation 3: Scope
The long-term-customer and the medium-term customer shall have priority over the short-term customer for use of the inter-State transmission system.
The short-term customer shall be eligible for short-term open access over the surplus capacity available on the inter-State transmission system after use by the long-term customer and the medium-term customer, by virtue of
inherent design margins;
margins available due to variation in power flows; and
Margins available due to in-built spare transmission capacity created to cater to future load growth or generation addition.

14. Regulation 4: Detailed Procedure
Subject to the provisions of these regulations, the Central Transmission Utility, till the Regional Load Despatch Centre is operated by it and thereafter the Government company or any authority or corporation notified by the Central Government under subsection (2) of Section 27 of the Act: shall, after obtaining prior approval of the Commission, issue the detailed procedure to operationalise open access and on any residual matter not covered under these regulations

15. Regulation 5: Nodal Agency
The nodal agency for bilateral transactions shall be the Regional Load Despatch Centre of the region where point of drawal of electricity is situated and in case of the collective transactions, the nodal agency shall be the National Load Despatch Centre.

16. NODAL AGENCY For Short-Term Customers
CTU
PROCEDURES
NODAL AGENCY
For Short-Term Customers
RLDC of the Region in which the drawal point is located.
For Long & Medium Term Customers
Central Transmission Utility (CTU), if its system is used
Transmission Licensee/ STU of the region in which the drawl point is located when CTU system is not involved.

17. Regulation 6: Submission of STOA Application
A short-term customer or the power exchange (on behalf of buyers and sellers) intending to avail of STOA for use of the transmission lines or associated facilities for such lines on the ISTS, shall make an application to the nodal agency
The application for a bilateral transaction shall contain the details, such as
names and location of supplier and buyer,
contracted power (MW) to be scheduled and interface at which it is referred to,
point of injection,
point of drawal,
starting time block and date,
ending time block and date, and
such other information that may be required in the detailed procedure.
The application for a collective transaction shall contain the requisite details in accordance with the detailed procedure.

18. GENERAL CONDITIONS/APPLICATION SUBMISSION
CTU
PROCEDURES
As per OA regulations Dtd. 25/01/08 w.e.f 01/04/08 &
OA Amendment Regulations Dtd. 20/05/09 &
as per order-amendment to CTU procedure Dtd.28/10/09
RLDC will check if connectivity with CTU/ ISTS or STU system (as the case may be) is established, necessary metering,protection, communication are in place, transfer capability upto the CTU network for power flow of the quantum of injection/drawal applied for is available on the date of application and whether the applicant has undertaken to abide by the Central Electricity Authority (Technical Standards for Connectivity to the Grid) Regulations, 2007.
Application to be submitted to::
Nodal RLDC where point of drawal is situated
& also to all RLDCs involved in the transaction
Application Contents
Details:: Buyer / Seller / Point of injection/ point of drawal / Contracted power at supplier interface/ date/ time period (as per (Format-I-Application for scheduling) alongwith application fee/SLDC concurrance

19. Regulation 7: Application Fee
An application made for each bilateral transaction or the collective transaction shall be accompanied by a non-refundable fee of Rupees five thousand (` 5000/-)only
Provided that the fee for bilateral transaction on the day of the application or on the day immediately following the day of the application may be deposited within three working days of submission of the application.

20. Regulation 8: Concurrence of SLDC for bilateral and collective transactions
When a Proposed bilateral transaction has a State utility or an intra-State entity as a buyer or a seller
concurrence of the SLDC shall be obtained in advance and submitted along with the application to the nodal agency in the form as in the detailed procedure.
When a State utility or an intra-State entity proposes to participate in trading through a power exchange, it shall obtain
a “no objection” or a prior standing clearance from the SLDC in the form as in the detailed procedure, specifying the MW up to which the entity may submit a buy or sell bid in a power exchange.

21. Regulation 8: Concurrence of SLDC for bilateral and collective transactions…..contd
3(a) For obtaining concurrence or ‘no objection’ or prior standing clearance :
Application before the SLDC
Acknowledgement receipt of the application, either by or fax, or any other recognised mode ,
within twenty four hours
At the time of submission in case submitted in person
3(b) SLDC shall verify the following, namely-
existence of infrastructure necessary for time-block-wise energy metering and accounting in accordance with the provisions of the Grid Code in force, and
availability of surplus transmission capacity in the State network.
3(c) SLDC to concur ‘no objection’ / prior standing clearance
Within three (3) working days if infrastructure exists
Within seven (7) working days for a first time STOA Customer
Within two (2) working days for a defective/incomplete application

22. Regulation 8: Concurrence of SLDC for bilateral and collective transactions…..contd
In case of SLDCs refusal ( Application is in order)
To be communicated, within the period of three (3) working days or seven (7) working days
Reasons for such refusal:
In case of no Communication by SLDC
STOA shall be deemed to have been granted:
In case of deemed STOA grant by SLDC
the applicant while making application shall submit to the nodal agency an affidavit (in the format provided in the detailed procedure), duly notarised, declaring that –
(a) the SLDC has failed to convey any deficiency or defect in the application or its refusal or concurrence or ‘no objection’ or prior standing clearance

23. Regulation 8: Concurrence of SLDC for bilateral and collective transactions…..contd
(b) necessary infrastructure for time-block-wise energy metering and accounting in accordance with the provisions of the Grid Code in force, is in place; and enclosing with the affidavit –
(i) a copy of the complete application after removal of deficiency or rectification of defects, if any communicated, made to the SLDC for seeking concurrence or ‘no objection’ or prior standing clearance, as the case may be, and
(ii) a copy of the acknowledgement, if any, given by the SLDC, or any other evidence in support of delivery of the application.

24. SUBMISSION OF APPLICATION
CTU
PROCEDURES
SUBMISSION OF APPLICATION
SLDC concurrance
Concerned SLDCs concurrence in advance (Format - II-Concurrance from SLDC)
In case of deemed concurrance the applicant alongwith the application shall submit duly notarized affidavit (Format-IIA-Affidavit-Deemed concurrance from SLDC
RLDC concurrance
- Bilateral Transaction having a State Utility or an intra-state Entity as a Buyer/Seller in other region:: concurrence of the concerned Regional Load Despatch Centre(s).
- Nodal applications to be considered first before giving other concurrance
- Reasons for refusal

25. SUBMISSION OF APPLICATION
CTU
PROCEDURES
SUBMISSION OF APPLICATION
Affidavit for deemed SLDC concurrance:
(a) the State Load Despatch Centre has failed to convey any deficiency or defect in the application or its refusal or concurrence or ‘no objection’ or prior standing clearance, as the case may be, within the specified time(3/7days)
(b) necessary infrastructure for time-block-wise energy metering and accounting in accordance with the provisions of the Grid Code in force, is in place; and enclosing with the affidavit –
(i) a copy of the complete application after removal of deficiency or rectification of defects, if any communicated for seeking concurrence or ‘no objection’ or prior standing clearance, as the case may be, and
(ii) a copy of the acknowledgement, if any, given by the State Load Despatch Centre, or any other evidence in support of delivery of the application to the State Load Despatch Centre.”

26. Categories & Time Line For Open Access
DL-10
DL-5 DL
DL+5
DOP-4
DOP
Adv Application for M1
DOP-1
FCFS
CONTINGENCY
Adv Application for M2,
Approvals for M1
Adv Application for M3,
Approvals for M2
Approvals for M3
Day Ahead / PX
LEGEND:
DOP : Day of Operation
DL : Last day of M0

27. Regulation 9: Procedure for Advance Scheduling for bilateral transactions

28. ADVANCE SCHEDULING Advance Scheduling – 3 months in advance
Separate Application –
Month wise - each transaction
Time Line for submission
Last date for submission ( -10 / -5 / 0 days prior to end of current month MO – for transaction in M1, M2, M3)
Cut-off time of application: 17:30 Hrs. of last day (Day 0)
Request for concurrence (RLDC) – by 12:00 Hrs.(Day 1) (Format- III)
Concurrence - by 20:00 Hrs (Day 1)
Congestion Information to Applicant – 12:00 Hrs (Day 2)-Format-IV(Congestion information-Advance scheduling)
Revised Request/re-routing – 11:00 HRs. (Day3)-Format-V-Request for revision due to congestion)
E-bidding – in case of Congestion (Day 4)
Acceptance/Refusal of Scheduling Request – (Day5)-Format-VI-Acceptance for scheduling

29. Application for advance schedulingM1 M0 M2 M3
Application
Separate application shall be made for each month,
and for each transaction.

30. Time Line for Advance Scheduling10 5 5 `
Last Day for submission of Applications for transactions in M1, M2, M3
Processing time for RLDCs

31. Regulation 10 Congestion Management : e- Bidding Procedure
Invitation of Bids from the concerned applicant
period of congestion
RTS/IR corridor expected to get over stressed
Only Registered Users
User ID & Password
Electronic submission – website of CTU
Bid Closing time as specified
Single Price Bid
No Modification/withdrawal once submitted
Bid Price
– In addition to Open Access Transmission charges
- Multiples of Rs. 10/ MWh . ( Min. Rs. 10/MWh)
Mandatory - Non-participation – Rejection of Application
Acceptance - Decreasing order of Price Quoted
Equal Price Bids – Pro-rata
Applicant getting approval < request  Charges as quoted
Applicant getting approval=request  Charges as paid by last applicant getting approval = request

32. Regulation 11,12,&13 Procedure for FCFS, Day ahead & Contingency bilateral transactions

33. “FIRST-COME-FIRST-SERVED”(FCFS)
Scope
FCFS shall be considered only when transactions are commencing & terminating in the same calender month.
Separate Application for each month
To be submitted 4 days prior to date of Scheduling
Processing time – 3 days on FCFS basis
Applications received during last 10 / 5 days of month of M0 for M1/M2 would be considered only after complete processing of Advance transactions for M1 & M2
Application Received upto 1730 hrs in a day to be processed together – same priority
Application Received after 17:30 Hrs. - to be considered as received next day
Congestion Management – pro-rata

34. Application for FCFS schedulingM1
17:30 Hrs M0 M2 M3
D-04
D-03 D0
Application
Processing time
Separate application shall be made for each transaction.

35. Regulation 12: DAY-AHEAD
Applications received within 3 days prior to the day of Scheduling and up to 15:00 Hrs. of the day immediately preceding the day of scheduling shall be treated as same priority
Processing only after processing of the Collective Transactions of the Power Exchange (s)
Congestion Management – Pro-rata

36. Application for Day ahead schedulingM1 M0 M2 M3
D-03 D0
Application
Processing time
Approval after Collective
Separate application for each transaction.

37. Regulation 13: CONTINGENCY
Buying Utility/Trader on its behalf to make an Application to the Nodal RLDC
To be considered after 1500 hrs of the day immediately preceding the day of scheduling
In case of intra-day/same day –
scheduling from 6th time block
Congestion Management – Pro-rata

38. Regulation 14: Revision of Schedule
Only in case of “Advance Scheduling” or “First-Cum-First Served basis”
Accepted schedule for Day-Ahead & Contingency transaction shall not be revised or cancelled except for tripping of generators > 100MW as per Cl of IEGC.
Revision w.e.f 4th time block of intimation to RLDC
Generator to furnish expected restoration time from which original schedules would become effective.
For period of revision/cancellation upto two days:: Original transmission/operating charges
For period of revision/cancellation > two days:: Transmission Charges and Operating Charges for the period beyond two (2) days shall be payable as per the revised accepted schedule and for the first two (2) days as per the original schedule.
Margin Available – released for scheduling of eligible Open Access Transactions

39. EXAMPLE OF DOWNWARD REVISION

40. Regulation 15:: CURTAILMENT IN CASE OF TRANSMISSION CONSTRAINTS
Transmission constraint or to maintain grid security
Curtailed in the manner, which in the opinion of RLDC, would relieve transmission constraints/ enhance grid security
Curtailment priority ::
STOA(bilat)Collective(PX)MTOALTA
In case of reallocation of GOI share leading to corridor constraints
Rerouting allowed without curtailment of existing transactions
Pro-rata refund of Transmission Charges
No revision of operating charges

41. Bilateral, intra-regional 80 Bilateral , Between adjacent regions 160
Regulation 16: Transmission Charges [repealed by 19(1) of Regulations on sharing of iSTS charges-2010]
Type of Transaction
Rs./ MWh
Bilateral, intra-regional 80
Bilateral , Between adjacent regions
160
Bilateral, wheeling through one or more regions
240
Collective
100
(per each point of injection and each point of drawal)

42. Transmission Charges …. contd
The intra-State entities shall pay the transmission charges for use of the State network as fixed by the respective State Commission in addition to the charges specifie
Provided that in case the State Commission has not determined the transmission charges, the charges for use of respective State network shall be payable at the rate of Rs.80/MWh for the electricity transmitted:
Provided further that non-fixation of the transmission charges by the State Commission for use of the State network shall not be a ground for refusal of short –term open access:
Provided also that the transmission charges payable for use of the State network shall be conveyed to the Regional Load Despatch Centre concerned who shall display these rates on its web site:
Provided also that the transmission charges payable for use of the State network shall not be revised retrospectively.

43. Application of POC methodology for STOA transactions

44. Calculation of Nodal POCs
Input
Network Parameters
Load & Generation Data
Load Flow Studies
Converged Network
Network Reduction
Reduced Network
Software for PoC Charge & Loss Computation
Line wise YTC
Output
Nodal PoC Charges and LAF

45. Application of POC Transmission Charge methodology for STOA transactions
Nodal POCs zoned to form Zonal POC for each Control area
Slabbing done to fall into either high, Average or Low slab
For New Grid:
High  Rs. 1,00,000/Mw/month Average  Rs. 85,000/MW/Month Low Rs.70,000//MW/Month
Converted to High  14paise/unit Average  12 paise/unit Low  10paise/unit
Hence STOA rates applicable are Rs.140/MWH, Rs.120/MWh, Rs.100/MWh for High, average, Low slab respectively
For SR Grid :
Slab rates are Rs. 150/MWh, 130/MWh, 110/MWH for High, Average, Low slabs respectively
Total No. of combinations possible(not permutations as order does not matter) :
NC2 + N = N(N+1)/ [considering N additional cases for same POC
injection/withdrawal rates]
Thus increase in total number of stamp rates for various transactions have risen from 3 to 21

46. Application of POC Transmission Charge methodology for STOA transactions
Transmission charges payable by Entity X injecting 100MW RTC power to Entity Y
Assume X falls in high injection slab in NEW Grid while Y fall in low withdrawal slab in SR Grid
Hence POC injection for X  Rs 140/MWH
Withdrawal POC for Y  Rs.110/MWh
Transmission charges payable for injection would be :
= 2400MWh x 140
Transmission charges payable for withdrawal would be:
= 2400MWh X 110
Total charges payable by Trader to Nodal RLDC:
= 2400*( ) Rs.
STU charges would be payable in addition

47. Regulation 16: Transmission Charge as per POC regulations

48. Regulation 16: Transmission Charge as per POC regulations

49. Regulation 16: Transmission Charge as per POC regulations

50. Regulation 16: Transmission Charge as per POC regulations

51. Regulation 17: Operating Charges
Bilateral Transaction
Rs.2000/- per day or part of the day/transaction /RLDC
Rs.2000/- per day or part of the day/transaction /SLDC
Collective Transaction
Rs.5000/- per day or part of the day/state to NLDC
Rs.2000/- per day or part of the day/transaction for each SLDCs involved
NLDC to share operating charges with each RLDC
NLDC keeps Rs.2000/- and Rs.3000/- divided amongst 5 Rs.600/RLDC
Clubbing of buyers & sellers within a state
Each group be considered as single entity for Operating charges and for scheduling by NLDC
Each point of drawal & injection shall be counted separately for the purpose of intra-state transmission charges

52. Regulation 18: Payment of transmission charges and operating charges
Bilateral transaction:
the applicant to deposit with the nodal agency transmission charges and operating charges within three (3) working days of grant of acceptance
Collective transactions:
the power exchange shall deposit with the nodal agency these charges by the next working day falling after the day on which its application was processed
the transmission charges for use of State network and operating charges for SLDC shall be settled directly by the power exchange with respective SLDC.

53. Regulation 19: Default in payment of STOA charges
Default in payment of the application fee or specified charges :
charges the nodal agency may decide not to schedule the transaction, or
to cancel the scheduling of already scheduled transaction or
not to entertain any application of such persons in future until such time the default is cured
The person committing default in payment
Shall pay simple interest at the rate of 0.04% for each day of default.

54. DEFAULT IN PAYMENT OF OPEN ACCESS CHARGES – Additional Pts
CTU
PROCEDURES
DEFAULT IN PAYMENT OF OPEN ACCESS CHARGES – Additional Pts
Cheque has been dishonored
No cheque payment - next three (3) months
Payment to be made by electronic transfer/demand draft

55. INCORPORATION IN DAILY SCHEDULES
CTU
PROCEDURES
INCORPORATION IN DAILY SCHEDULES
Incorporation in Daily Schedules of the Regional Entities
Average energy losses - estimated on weekly basis and converted to Tier I, II, III slabs
RLDCs – ISTS (Inter State Control area)
SLDC – (Intra-State/Control area)
Resolution of 0.01 MW at each State/inter-Regional boundaries.
Losses on the system to be compensated by Drawing utility (net drawal schedule after deducting losses) till 30th Sep,2011
W.e.f 1st October,2011 losses to apportioned to both buyers & sellers

56. COMMERCIAL CONDITIONS (SUMMARY)
CTU
PROCEDURES
COMMERCIAL CONDITIONS (SUMMARY)
All Payment related to Open Access Charges
Payment to be made by Applicant to the Nodal RLDC
within three working days from the date of acceptance
Payment as per MWh contract value
Application Fee:: (Rs. 5000/-) to Nodal RLDC
Along with application (for Advance/FCFS transaction)
With in 3 working days ( for same day or next day transaction) from the date of application submission.
Operating charges:: Rs. 2000/- per day for each RLDCs/SLDCs involved and Rs.5000/- per day per entity for collective

57. COMMERCIAL CONDITIONS (SUMMARY)CTD..
CTU
PROCEDURES
COMMERCIAL CONDITIONS (SUMMARY)CTD..
If State utility is Buyer/Seller, Transmission Charges shall not include the charges for that State network and the Operating Charges for that State Load Dispatch Center. A certificate in this regard from the concerned STU(s)/SLDCs shall be submitted by the Applicant
The transaction wise payment details shall be submitted as per enclosed format[FORMAT-VII: “Details of Payment”].

58. Regulation 20:: Unscheduled Inter- change (UI) Charges
All transactions for State utilities and for intra-State entities scheduled by the nodal agencies shall be accounted for and included in the respective day-ahead net interchange schedules of the concerned regional entity issued by the RLDC
Based on net metering on the periphery of each regional entity, composite UI accounts shall be issued for each regional entity on a weekly cycle and transaction-wise UI accounting, and UI accounting for intra-State entities shall not be carried out at the regional level.
The State utility designated for the purpose of collection / disbursement of UI charges from / to intra-State entities shall be responsible for timely payment of the State’s composite dues to the regional UI pool account.

59. Regulation 20:: Unscheduled Inter- change (UI) Charges
Any mismatch between the scheduled and the actual drawal at drawal points and scheduled and the actual injection at injection points for the intra-State entities shall be determined by the concerned SLDC and covered in the intra-State UI accounting scheme.
Unless specified otherwise by the concerned State Commission, UI rate for intra-State entity shall be 105% (for over-drawals or under generation) and 95% (for under-drawals or over generation) of UI rate at the periphery of regional entity.
No charges, other than those specified under these regulations shall be payable by any person granted short-term open access under these regulations.

60. Regulation 21: Reactive Energy Charges
No separate reactive energy charge accounting for STOA transactions shall be carried out at inter-State level:
Provided that the State Utility designated for the purpose shall be responsible for timely payment of the State’s composite dues to the regional reactive charge account in accordance with the provisions of the Grid Code.
The reactive energy drawals and injections by the intra-State entities shall be governed by the regulations applicable within the State concerned.

61. Regulation22: Special Energy Meters
Special Energy Meters shall be installed by the Central Transmission Utility for and at the cost of the regional entities and by the State Transmission Utility for and at the cost of the intra-State entities.
Special Energy Meters installed shall be capable of time-differentiated measurements for time block wise active energy and voltage differentiated measurement of reactive energy in accordance with Annexure – 2 to Chapter–6 of the Grid Code.
Special Energy Meters shall always be maintained in good condition.
Special Energy Meters for the regional entities shall be open for inspection by any person authorized by the Central Transmission Utility or the Regional Load Despatch Centre.

62. Regulation23:: Transmission losses
The buyers and sellers of the electricity shall absorb apportioned energy losses in the transmission system as estimated by the Regional Load Despatch Centre and the State Load Despatch Centre concerned, and applied in accordance with the detailed procedure.
The energy losses shall be accounted for by providing a differential between schedules at the points of supply, inter-utility transfer and drawal of electricity.
The applicable transmission losses for the regional transmission system as well as for State network shall be declared in advance and shall not be revised retrospectively.

63. Regulation23:: Transmission losses- Amendment of procedures by CTU
Nodal POC losses found from Webnetuse software
Zoning done to form loss for each scheduling entity
Assume POC injection loss of X = a% & POC withdrawal loss of B = y%
For 100Mw injection transaction from X to Y:
Upto 30th September,2011 losses to be absorbed by Buyers only
Point of contract  Sellers periphery
Injection schedule of X = -100Mw
Withdrawal schedule of Y = 100*(1-a/100)*(1-b/100) rounded off to 2 decimals
After 1st October,2011 losses to be apportioned to both buyer & Seller 
Point of contract  Regional periphery where entity located
Injection schedule of X = -100/(1-a/100) rounded to 2 decimals
Withdrawal schedule of Y = 100*(1-b/100) rounded to 2 decimals
Losses classified as Tier-I , II , II according to Low, Average or High slab.

64. Loss calculation-Amended CTU loss procedures
If W current week, loss of week W-1 is estimated & applied for week W+1
If a = losses as per SEM data for W-1 losses for Tier I, II, III slabs would be
Low(Tier-I) = [a/2-0.3]% Average(Tier-II)= a/ High(Tier-III) =
[a/2+0.3]%
E.g. estimated loss for w-1 for ER = 3.90%
Low(Tier-I) = 1.65% Average(Tier-II)= 1.95% High(Tier-III) =2.25%
The Tier-I, II, II slabs are fixed as per studies & are constant for the review period are as below 
Similiarly injection/withdrawal losses for all other regions are calculated

65. CERC Approved Results – Loss slabs

66. CERC Approved Results – Loss slabs

67. CERC Approved Results – Loss slabs

68. Regulation 24::Compliance of Grid Code
The buyers and sellers of energy shall comply with the provisions of the Grid Code in force from time to time.

69. Regulation 25: Collection and Disbursement of Transmission Charges and Operating Charges(previous)
The transmission charges and the operating charges payable by the persons allowed short-term open access shall be collected and disbursed by the nodal agency, except for transmission charges for State network and operating charges for SLDC in the case of the collective transaction
Operating/Transmission charges for SLDCs/STUs to be settled directly by PX with the concerned SLDC/STU
The transmission charges collected by the nodal agency for use of the transmission system other than State network, for a bilateral transaction shall be directly disbursed to the long-term customers
25% of the Tr. Charge to the CTU
Intra-regional bilateral transaction: 75% of the transmission charges to the region concerned.
bilateral transaction between adjacent regions: 37.5% of the transmission charges for each region.
bilateral transaction through one or more intervening regions: 25% of the transmission charges for each of importing and exporting each region and remaining 25% of the transmission charges to be allocated equally among all intervening regions.

70. Reg.25(previous)…Ctd
The transmission charges collected for use of the transmission system other than State network for a collective transaction for each point of injection and each point of drawal shall be disbursed by the nodal agency in the following manner, namely-
Central Transmission Utility: 25%
Long-term customers of the region of point of injection or drawal, as the case may be, is situated: 75%
The transmission charges shall be disbursed to the long-term customers inproportion to the monthly transmission charges payable by them.
The transmission charges for use of State network shall be disbursed to the State Transmission Utility concerned.
In case a State utility is the short-term customer, the operating charges and the transmission charges collected by the nodal agency shall not include the charges for use of the State network and operating charges for the State LoadDespatch Centre.”

71. Collection and Disbursement of Transmission Charges and Operating Charges (amended vide CERC order Dtd. 28th June,2011)
The transmission charges and operating charges payable by the persons allowed short-term open access shall be collected by the nodal agency, except for transmission charges for state network and operating charges for State Load Despatch Centre in the case of the collective transaction.
The transmission charges collected by the nodal agency for use of the transmission system other than State network, for both bilateral and collective transaction shall be given to the CTU for further disbursement to long-term customers in accordance to Central Electricity Regulatory Commission (Sharing of Inter State Transmission Charges and Losses) Regulations, 2010, and the approved detailed procedure there under for Billing, Collection and Disbursement.

72. Collection and Disbursement of Transmission Charges and Operating Charges (amended vide CERC order Dtd. 28th June,2011)
The transmission charges collected for use of the transmission system other than State network for a bilateral or collective transaction for each point of injection and each point of drawal shall be disbursed by the CTU after adjusting against the charges for Long Term Access without identified beneficiaries in the same region in accordance with detailed procedure for Billing, Collection and Disbursement in the following manner, namely-
(a) Central Transmission Utility: 25%
(b) Long-term customers of the synchronously connected grid: 75%
The transmission charges for use of State network shall be disbursed to the State Transmission Utility concerned.
In case a State utility is the short-term customer, the operating charges and the transmission charges collected by the nodal agency shall not include the charges for use of the State network and operating charges for the State Load Despatch Centre.”

73. Billing, Collection & Disbursement Procedures Approved by CERC Vide order dtd.29th April,2011 – Para &(3) b & c
For STOA, DIC shall have to pay applicable transmission charges to the RLDC/NLDC at the time of application. The payment made for the STOA charges for varying quantum and varying duration with respect to (i) bilateral transactions to the region of LTA granted and (ii) all collective transactions, shall be credited to that DIC in the next month billing subject to the upper limit of the amount paid as LTA charges after accounting for the MTOA charges, if any, as per 7.2 (b) above, provided that the STOA is in the direction of the targeted regions mentioned in the LTA granted to the DIC by the CTU.
If the STOA is other than the targeted regions mentioned in the LTA, then such STOA, PoC charges shall not be adjusted against the LTA granted by the CTU and a separate applicable PoC charges shall have to be paid by the DIC.

74. Billing, Collection & Disbursement Procedures Approved by CERC Vide order dtd.29th April,2011 – Para &(3) b & c
Provided that this adjustment shall not be done for collective transaction and bilateral transactions done through portfolio trader.
For STOA transactions not qualifying for aforementioned credit, the STOA charges after disbursing 25% of such transmission charges to the CTU in accordance with the CERC (Open Access) in inter-State Transmission Regulation 2008 and amendment thereof, shall be adjusted with respect to the paying DICs (for the respective applicable month) by the next 30 days of receipt of such payments.

75. BCD Procedures-Amendment order Dtd.15th June,2011
For STOA, DIC shall have to pay applicable transmission charges to the RLDC/NLDC at the time of application. The payment made for the STOA charges for the quantum with respect to bilateral transactions upto the LTA for the specific Region of LTA granted without identified beneficiaries,, shall be credited to that DIC in the next month billing after accounting for the MTOA charges, if any, as per 7.2 (b) above.
Provided that the STOA is in the direction of the targeted regions mentioned in the LTA granted to the DIC by the CTU. If the STOA is other than the targeted regions mentioned in the LTA, then such STOA, PoC charges shall not be adjusted against the LTA granted by the CTU and a separate applicable PoC charges shall have to be paid by the DIC.
Provided that this adjustment shall not be done for bilateral transactions done through portfolio trader.”

76. DISBURSAL OF PAYMENT – Additional Pts
CTU
PROCEDURES
DISBURSAL OF PAYMENT – Additional Pts
Nodal RLDC :: Reconcile the Open Access Charges collected for previous month & disburse the Transmission/Operating Charges
Transmission Charges and Operating Charges – for State System
Concerned STUs/SLDCs
Refunds due to curtailment/revision in previous month
15th day of the current month
No responsibilty for payment dishonour: Disbursement only to extent of receipt

77. Short-Term Open Access transaction by embedded utilities EXAMPLE From
Short-Term Open Access transaction by embedded utilities EXAMPLE From : TATA Steel , DVC To : NDPL Discom, Delhi Quantum : 100 MW Path : ER – WR - NR
Source : SAIL

78. Loss calculation Methodology (upto 30th Sep,2011)
Contract value  100MW
Transaction  Tata steel- DVC - ER – WR – NR – DTL- NDPL
DVC STU loss  3% DVC Inj POC loss  1.5%
Delhi withdrawal POC loss  2% DTL STU loss  1.5%
RLDCs need to show schedules only upto requisite control area periphery
Hence schedule values only upto DVC boundary & DTL boundary need be shown by RLDCs. Accordingly, all STU losses are not required. [Values are shown for understanding only].
97MW
DVC BDY
95.55MW REGIONAL BDY
100MW CONTRACT
TATA STEEL BDY ER
93.64MW
DTL BDY
TATA STEEL
NDPL WR NR
92.24MW
NDPL BDY

79. Loss calculation Methodology (w.e.f 1st October,2011)
Contract value  100MW
Transaction  Tata steel- DVC - ER – WR – NR – DTL- NDPL
DVC STU loss  3% DVC Inj POC loss  1.5%
Delhi withdrawal POC loss  2% DTL STU loss  1.5%
RLDCs need to show schedules only upto requisite control area periphery
Hence schedule values only upto DVC boundary & DTL boundary need be shown by RLDCs. Accordingly, STU losses are not required w.e.f 01/10/11 [Values are shown for understanding only].
101.52MW
DVC BDY
100MW CONTRACT
104.66MW
TATA STEEL BDY ER
98MW
DTL BDY
TATA STEEL
NDPL WR NR
96.53MW
NDPL BDY

80. STOA charges calculation Methodology:: Tata Steel-DVC-ER-WR-NR-DTL-NDPL
Contract value  100MW RTC power x 5 days  12000MWh(total contracted energy)
Transaction  Tata steel- DVC - ER – WR – NR – DTL- NDPL
DVC injection POC  14p/unit  Rs.140/MWh
Delhi withdrawal POC  10p/unit  Rs.100/MWh
DVC STU transmission charges = 80 x
DVC injection POC transmission charges = 140 x 12000
DTL STU transmission charges = x
Delhi withdrawal POC transmission charges = 100 x 12000
NRLDC operating charges = x 5 ER
DVC SLDC operating charges = x 5
TATA STEEL
NDPL
DTL SLDC operating charges = x 5
ERLDC operating charges = x 5 WR
Upto 30th Sep,2011 Contract value at sellers’ periphery. No change in calculations
100MW CONTRACT VALUE NR
WRLDC operating charges = x 5
ALL OF ABOVE +
NON REFUNDABLE APPLICATION FEES  Rs.5000/-

81. Sample bill for the transaction

82. Regulation 25A:: STOA Not To Be Granted
When so directed by the Commission, the National Load Despatch Centre or the Regional Load Despatch Centre, as the case may be, shall not grant short-term open access to the entities and associates of such entities,
who consistently and willfully default in payment of
Unscheduled Interchange charges,
transmission charges,
reactive energy charges,
congestion charges and
fee and charges for National Load Despatch Centre or Regional Load Despatch Centre
including the charges for the Unified Load Despatch and Communication Scheme

83. Regulation 26::Redressal Mechanism
All disputes arising under these regulations shall be decided by the Commission based on an application made by the person aggrieved.

84. GENERAL CONDITIONS CTU PROCEDURES
Entities which are making Application for the first time must submit the “One- Time” information as per enclosed format (FORMAT-VIII: “Registration Form) to the concerned nodal RLDC.
Application - through Post / fax
Any amendment/modification
fresh Application
Applications not accorded the Acceptance:
stand disposed off with suitable intimation to the concerned Applicant(s)
All costs/expenses/charges associated with the Application, including Bank Draft, shall be borne by the Applicant.
Incomplete / vague Application
summarily rejected
No charges payable for a transaction shall be adjusted by against any other payments/charges.
The Applicant shall abide by the provisions of The Electricity Act, 2003, Indian Electricity Grid Code and CERC Regulations, as amended from time to time
Applicant shall keep each of the SLDCs/ RLDCs indemnified

85. Regulation 27:: Information System–NLDC & RLDCs
National Load Despatch Centre and each Regional Load Despatch Centre shall post the following information on their websites in a separate web-page titled “Open access information”:
These regulations;
The detailed procedure
A list of bilateral transactions accepted by the nodal agency, to be displayed till the end of the month in which transactions are scheduled, indicating:
(i) Name of customers;
(ii) Period of the short-term open access granted (start date end date);
(iii) Point or points of injection;
(iv) Point or points of drawal;
(v) Transmission systems used (in terms of regions
and States);
(vi) Accepted schedule (MW) with start time and
end time

86. Regulation 27A::Information System– SLDCs
Each State Load Despatch Centre, shall within 60 days of coming into force of these regulations, develop its website and post the following information on separate web-page titled “information on Inter-State Open Access”:
(a) List of bilateral transactions for which concurrence has been granted and
list of entities to whom concurrence or “no objection” or prior standing
clearance, as the case may be, has been granted till the end of the month in
which such concurrence or no objection or prior standing clearance has
been granted, indicating:
(i) Name of customer;
(ii) Period of concurrence or “no objection” or standing clearance, as the
case may be, (start date and end date);
(iii) Point or points of injection and drawal,; and
(iv) Accepted schedule (MW).
(b) Average transmission losses for the State network for the immediately
preceding 52 weeks;
(c) Applicable transmission charges and transmission losses for the State
network;
(d) List of applications where concurrence or “no objection” or standing
clearance, as the case may be, was not granted, along with reasons for
refusal, to be displayed till one month after the scheduling period given in
the application; and
(e) A list of applications pending for decision.]

87. Regulation 28 ::Savings and Repeal
The provisions of the Central Electricity Regulatory Commission (Open Access in inter-State Transmission) Regulations, 2004 shall not apply to the short-term open access] customers whose applications are processed under these regulations.
The provisions relating to long-term customers as contained in the Central Electricity Regulatory Commission (Open Access in inter-State Transmission) Regulations, 2004 shall continue to apply till Commission notifies separate regulations covering aspects relating to long-term customers.
The provisions relating to short-term open access as contained in the Central Electricity Regulatory Commission (Open Access in inter-State Transmission) Regulations, 2004 shall stand repealed on

88. OA FROM STATES’ PERSPECTIVE

89. FOR(Forum of Regulators) website  www.forumofregulators.gov.in
Aspects to be covered
FOR(Forum of Regulators) website 
Model Terms & conditions for Intra State OA Regulations released by FOR on Sep’2010
Topics to be discussed to be limited to following aspects:
Connectivity
Eligibility for OA
Categories for OA
Open Access Charges applicable
Limited STOA customer
Sample OA charges calculations

90. Connectivity
Only a consumer having load of 10 MW and above or a Generating Station having capacity of 10 MW and above shall be eligible to obtain connectivity to the intra-State transmission system, unless already connected, and shall apply for connectivity, in accordance with the provisions in this chapter
Generating Station having installed capacity less than 10 MW shall be eligible to obtain connectivity to the Distribution system and shall apply for connectivity as per the provisions of these regulations, unless already connected, in accordance with the provisions in this chapter.

91. Eligibility for OA
Licensees, generating companies, captive generating plants and consumers shall be eligible for open access to the intra-State transmission system of the State Transmission Utility or any transmission licensee on payment of transmission and other charges as may be determined by the Commission
Licensees, generating stations, captive generating plants and consumers shall be eligible for open access to distribution system of a distribution licensee on payment of the wheeling and other charges as may be determined by the Commission
Open access shall be permissible to the consumers seeking open access capacity upto which SERC has introduced open access and are connected through an independent feeder emanating from a substation of licensee or industrial feeder provided that all the consumers on such industrial feeder opt for open access and having simultaneous schedule of drawal under such open access:

92. Eligibility for OA
Provided that the consumers who are not on independent feeders, shall be allowed open access subject to the condition that they agree to rostering restrictions imposed by utility on the feeders serving them
Provided further that duties of the distribution licensee with respect to such open access consumers shall be of a common carrier providing non-discriminatory open access as per section 42(3) of the Act
A person having been declared insolvent or bankrupt or having outstanding dues against him for more than two months billing of distribution/transmission licensee at the time of application shall not be eligible for open access.

93. Categories for OA customers
The application procedure, application fee and the time frame of processing request by eligible consumers seeking Open Access shall be based on the following criteria:
(1) System to which connected
(a) Intra-State transmission system
(b) Distribution system
(2) Inter-se location of drawal and injection points
(a) Both within the same distribution system
(b) within the State but in different distribution systems
(c) In different States
(3) Duration of Open Access
(a) Long term access
(b) Medium-term open access
(c) Short-term open access
The period of Access for categorization of LT cusyomers is not yet uniform across States e.g for WB >= 15 Yrs, Orissa >=25Yrs, Jharkhand >=10years

94. OA charges-Transmission charges
Inter State charges as applicable
Intra-State charges calculated as follows:
Transmission Charges = ATC/(PLST X365) (in Rs./MW-day)
Where,
ATC= Annual Transmission Charges determined by the Commission
for the State transmission system for the concerned year.
PLST= Peak load projected to be served by the State transmission
system in concerned year
Transmission charges shall be payable on the basis of contracted Capacity/ Scheduled Load or actual power flow whichever is higher.
For Open Access for a part of a day, the transmission charges shall be payable on pro-rata basis:
Where a dedicated transmission system used for open access has been constructed for exclusive use of an open access customer, the transmission charges for such dedicated system shall be worked out by transmission licensee for their respective systems and got approved by the Commission and shall be borne entirely by such open access customer till such time the surplus capacity is allotted and used for by other persons or purposes.

95. OA charges-Scheduling & System Operation charges
Intra-State charges for above other than Inter-State as decided by CERC as follows:
Long-term access and medium-term open access
SLDC charges determined by the Commission under sub-section (3) of section 32 of the Act
Short-term open access 
A composite operating Rs.2,000/- per day or part of the day shall be payable by a short-term open access customer for each transaction to the SLDC or as determined by the Commission from time to time.
The operating charge includes fee for scheduling and system operation, energy accounting, fee for affecting revisions in schedule on bonafide grounds and collection and disbursement of charges.

96. OA charges-Wheeling Charges
Wheeling Charges = (ARR – PPC – TC) /(PLSD X365) (in Rs./MW-Day)
ARR= Annual Revenue Requirement of the distribution licensee in the concerned year
PPC= Total Power Purchase Cost of distribution licensee in the concerned year
TC = Total transmission charges paid by distribution licensee for State and Inter-State transmission system for the concerned year
PLSD= Total Peak load projected to be served by the concerned distribution system in the concerned year
Provided that Wheeling charges shall be payable on the basis of contracted Capacity/ Scheduled Load or actual power flow whichever is higher.
For Access for a part of a day, the wheeling charges shall be payable on prorata basis:

97. OA charges-Wheeling Charges
Provided further that where a dedicated distribution system used for open access has been constructed for exclusive use of an open access customer, the wheeling charges for such dedicated system shall be worked out by distribution licensee for their respective systems and got approved by the Commission and shall be borne entirely by such open access customer till such time the surplus capacity is allotted and used for by other persons or purposes;
Provided also that an open access customer connected to the STU system shall be liable to pay the wheeling charges determined under this regulation, if such customer was paying wheeling charges directly or indirectly before availing open access.
In case an Open Access customer continues to pay the fixed charge and such fixed charge can be attributed to wheeling/distribution network related cost, partly or fully, SERC may provide for adjustment of such fixed charges against the wheeling charges determined as above

98. OA charges-Cross Subsidy Surcharge
If open access facility is availed of by a subsidising consumer of a distribution licensee of the State, then such consumer, in addition to transmission and/or wheeling charges, shall pay cross subsidy surcharge determined by the Commission.
Cross subsidy surcharge determined on Per Unit basis shall be payable, on monthly basis, by the open access consumers based on the actual energy drawn during the month through open access. The amount of surcharge shall be paid to the distribution licensee of the area of supply from whom the consumer was availing supply before seeking open access.
Cross Subsidy Surcharge formula:
S = T – [ C (1+ L / 100) + D ]
S is the surcharge
T is the Tariff payable by the relevant category of consumers;
C is the Weighted average cost of power purchase of top 5% at the margin excluding liquid fuel based generation and renewable power
D is the Wheeling charge in per kWh basis (to be derived from the wheeling charge in Rs./MW-Day
L is the system Losses for the applicable voltage level, expressed as a percentage
Provided that in case the above formula gives negative value of surcharge, the same shall be zero:

99. OA charges-Cross Subsidy Surcharge
Provided further that the Commission may fix a lower surcharge in the situation of shortages and load shedding by the distribution licensee:
Provided also that such cross subsidy surcharge shall not be levied in case distribution access is provided to a person who has established a captive generation plant for carrying the electricity to the destination of his own use.
Cross subsidy surcharge so determined by the Commission shall be reduced by 20% every year at a linear rate, taking the year in which the Commission has allowed open access to a category of consumers as the first year.
e.g. Cross subsidy surcharge of 1 Rs./ kWh determined in the first year will be 80 Paise/kWh in second year and 60 paise/ kWh in third year and so on:
Provided that in case power supply position or the consumer load seeking open access changes substantially, the Commission may review the Cross Subsidy Surcharge as and when required
Provided further that the revised cross subsidy surcharge so determined by the Commission in subsequent years shall be applicable only to the new Open Access applicants.

100. OA charges-Additional surcharge
Additional surcharge shall become applicable only if the obligation of the licensee in terms of power purchase commitments has been and continues to be stranded or there is an unavoidable obligation and incidence to bear fixed costs consequent to such a contract. However,the fixed costs related to network assets would be recovered through wheeling charges.
The distribution licensee shall submit to the Commission on six monthly basis, a detailed calculation statement of fixed cost which the licensee is incurring towards his obligation to supply.
The Commission shall scrutinize the statement of calculation of fixed cost submitted by the distribution licensee and obtain objections, if any, and determine the amount of additional surcharge:
Provided that any additional surcharge so determined by the Commission shall be applicable only to the new open access customers.
Additional surcharge determined on Per Unit basis shall be payable, on monthly basis, by the open access consumers based on the actual energy drawn during the month through open access:
Provided that such additional surcharges shall not be levied in case distribution access is provided to a person who has established a captive generation plant for carrying the electricity to the destination of his own use

101. OA charges-Standby charges
In cases of outages of generator supplying to open access customer under open access, standby arrangements should be provided by the distribution licensee for a maximum period of 42 days in a year, subject to the load shedding as is applicable to the embedded consumer of the licensee and the licensee shall be entitled to collect tariff under Temporary rate of charge for that category of consumer in the prevailing rate schedule subject to the condition that such tariff shall not exceed the highest consumer retail tariff in the prevailing rate schedule:
Provided that in cases where temporary rate of charge is not available for that consumer category, the standby arrangements shall be provided by the distribution licensee for a maximum of 42 days in a year and on payment of fixed charges of 42 days and energy charges for that category of consumer in the prevailing rate schedule:
Provided further that in case of stand by arrangements sought by continuous process industries, the licensee shall charge on the basis of actual costs involved in arranging power:
Provided also that open access customers would have the option to arrange stand-by power from any other source.

102. OA charges-Imbalance Charges
In case of deviation by open access consumers with load of less than 10 MW, the difference between the applicable sanctioned Open Access load and the actual drawal shall be accounted through the Time of Day (ToD) Meters on monthly basis and settled at the rate of the imbalance charge as determined by the Commission (where imbalance charge has not been determined by the Commission, UI charges as specified by the Central Commission shall be applicable).
In case of underdrawal as a result of non availability of the distribution system or unscheduled load shedding, the open access consumer shall be compensated by the distribution licensee at the average power purchase cost of the distribution licensee.
Deviations between the schedule and the actual injection/drawal in respect of open access consumers with load of 10 MW and above and the Generating Stations irrespective of the capacity, shall be settled based on the composite accounts for imbalance transactions issued by SLDC on a weekly cycle based on net metering in accordance with the charges specified by the State Commission.
Where the imbalance charges are not specified by State commission UI charges specified by the Central Commission to be used.

103. OA charges-Imbalance Charges
Payment of imbalance charges shall have a high priority and the concerned constituents (including the licensees or the open access customers as the case may be) shall pay the indicated amounts within 10 (ten) days of the issue of the statement, into a State imbalance pool account operated by the SLDC.
Recipient would then be paid out from the State imbalance pool account, within three (3) working days.
If payments against the above imbalance charges are delayed by more than two days, i.e., beyond twelve (12) days from the date of issue of statement, the defaulting party shall have to pay simple 0.04% for each day of delay.
The interest so collected shall be paid to the person who had to receive the amount, payment of which got delayed.
Persistent payment defaults, if any, shall be reported by the SLDC to the Commission, for initiating remedial action.

104. OA charges- Reactive Energy charges
In respect of open access consumer having a load of 10 MW or above, the payment for the reactive energy charges by open access consumers shall be in accordance with provisions stipulated in the State Grid Code.
Where the reactive energy charges are not specified by the State Commission, charges as per provisions stipulated in the IEGC shall be applicable
In respect of open access consumers of load less than 10 MW, reactive energy charges shall be calculated on Power Factor basis as specified by the Commission.

105. OA charges- Limited STOA customer
Subject to the provisions of these regulations, any consumer of the distribution licensee having contracted load upto which open access has been allowed by the Commission and connected through an independent feeder emanating from a grid sub-station of licensee or industrial feeder provided that all the consumers on such industrial feeder, may apply for Limited short-term open access and having simultaneous schedule of drawal under such open access.
Subject to the provisions of these regulations, in case of any Limited short-term open access consumer, the minimum schedule for drawl of power through open access in each time slot during the day shall not be less than maximum demand recorded during previous month or 80% of its contracted load whichever is higher.
“Time slot” means each 30 minutes time block which is the minimum period for which the Time-of-day meter is capable of integrating the maximum demand.

106. OA charges- Limited STOA customer
Limited short-term open access consumers shall be exempted from payment of transmission charges, wheeling charges, cross subsidy surcharge and additional surcharge.
However, they shall continue to pay other charges namely energy charge, demand/fixed charge, minimum consumption guarantee etc., applicable to them as per the rate schedule in the tariff order:
Provided that energy charges shall be payable as per balance energy/consumption calculated over & above the contracted load X No. of Hrs of OA availed
Limited short-term open access consumers shall also be liable to pay composite operating Rs.2,000/- per day or part of the day for each transaction to the SLDC or as determined by the Commission from time to time.
Inter-State charges if applicable additionally payable
Special conditions for Imbalance settlement
Nodal agency  SLDC

107. State OA charges- Sample calculations for Transmission charges only

108. State OA charges- Sample calculations for Transmission charges only

109. QUESTIONS? psdas_psd@yahoo.com