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Sharing of ISTS Charges & Losses Regulation “Point of Connection Transmission Pricing Methodology” Prepared By: Mangaljyoti Swapnil Nayak MBA- 6 th Batch.

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Presentation on theme: "Sharing of ISTS Charges & Losses Regulation “Point of Connection Transmission Pricing Methodology” Prepared By: Mangaljyoti Swapnil Nayak MBA- 6 th Batch."— Presentation transcript:

1 Sharing of ISTS Charges & Losses Regulation “Point of Connection Transmission Pricing Methodology” Prepared By: Mangaljyoti Swapnil Nayak MBA- 6 th Batch Prepared By: Mangaljyoti Swapnil Nayak MBA- 6 th Batch

2 INDIAN GRID INDIAN GRID HR CH KAR TN NER NR ER WR SR REGIONAL GRID CTU LinesSTU LinesSTATES CURRENT- CaseStates INTRA REGIONAL - KAR-TN ADJACENT REGION-CH-HR INTERVENING REGION-KAR-ER-HR

3 IMPLEMENTING AGENCY (NLDC-2yrs) DIC’s, ISTS Transmission Licensees, NLDC,RLDC,SLDC & Other Relevant Entity Commercial + Technical Information IA Create Zones – Generation, Demand IA compute - PoC charges & Losses LTOA– Rs./MW/Month STOA – Rs,/MW/Hr Approved by RLDC/NLDC IA Create Zones – Generation, Demand IA compute - PoC charges & Losses LTOA– Rs./MW/Month STOA – Rs,/MW/Hr Approved by RLDC/NLDC Participation factor & PoC Charges shall be computed for : Day : Peak- 8 hours, Other than Peak- 16 hours Block of Months :April –June, July – Sep, Oct-Nov, Dec- Feb, March Participation factor & PoC Charges shall be computed for : Day : Peak- 8 hours, Other than Peak- 16 hours Block of Months :April –June, July – Sep, Oct-Nov, Dec- Feb, March CERC (Sharing of Inter State Transmission Charges and Losses) Regulations, 2010 Regulations shall apply to all Designated ISTS Customers, Inter State Transmission Licensees, NLDC, RLDC, SLDCs, and RPCs The Central Transmission Network is considered for the calculation of charges & losses, which are applicable on the same The complete inter state Transmission System is divided into zones (Generation Zone & Demand Zone) consist of nodes. A state is considered as a single demand zone consist of multiple Generation Zones The charges & losses are defined for each Generation Zone & Demand Zone and are shared between the Generator and the Consumers based on the point of injection and point of drawal respectively.

4 CERC (Sharing of Inter State Transmission Charges and Losses) Regulations, 2010 Recovery of Yearly Transmission Charges and losses as per new transmission mechanism shall be based on both the methods by giving appropriate weightage : 50 % of YTC by Uniform Postage Stamp Method 50% of YTC by Point of Connection Method (After 2yrs Commission will review the weightage) Recovery of Yearly Transmission Charges and losses as per new transmission mechanism shall be based on both the methods by giving appropriate weightage : 50 % of YTC by Uniform Postage Stamp Method 50% of YTC by Point of Connection Method (After 2yrs Commission will review the weightage) Accounting of charges :Monthly Transmission Accounts applicable for various Designated ISTS Customers in each region shall be prepared by the respective RPC and RPC issue Regional Transmission Accounts on the 1st working day of the month for the previous month, same shall be display on website. Billing for ISTS charges : for all Designated ISTS Customers shall be on the basis of Rs./MW/Month, and shall be raised by the CTU. The SEB/STU may recover the transmission charges for the use of the ISTS from the distribution companies, generators and bulk customers connected to the transmission system owned by the SEB/STU Transition Period /Mechanism : The Commission shall notify detailed procedures as proposed by the Implementing Agency, along with corresponding timelines, as far as possible within 3 (three) months from the notification of this Regulation(15.06.2010). Regulations shall come into force from 1.1.2011, and unless reviewed shall remain in force for a period of 5 years Solar generators connected to Central Transmission Lines not have to pay the Transmission Charges & Losses

5 Transmission Pricing Philosophy 1. Point-to-Point Tariff (Postage Stamp Charges & Losses – In Practice) 2. Point-of-Connection Tariff (PoC Charges & Losses – New Mechanism) Charges & Losses of Intermediate Transmission System Transmission Charges & Losses at the Point of Drawal Transmission Charges & Losses at the Point of Injection Postage Stamp Charges & Losses Demand Access Charges & Losses at the Point of Drawal Generation Access Charges & Losses at the Point of Injection Point-of- Connection Charges & Losses

6 Applicability of Transmission Charges & Losses

7 KAR GENERATOR TN OLD MECHANISM CONSUMER STU –Tx Charges - C STU –Tx Losses - C CTU –Tx Charges - C CTU –Tx Losses -C STU –Tx Charges - C STU –Tx Losses -C Operating Charges : 1. KAR-SLDC 2. SRLDC 3. TN-SLDC 4. Application Fee CH KAR HR Operating Charges : 1. CH-SLDC 2. WRLDC 3. NRLDC 4. HR-SLDC 5. Application Fee Operating Charges : 1. KAR-SLDC 2. SRLDC 3. ERLDC 4. NRLDC 5. HR-SLDC 6. Application Fee GENERATOR CONSUMER CTU –Tx Charges - D CTU –Tx Losses -D CTU –Tx Charges - D CTU –Tx Losses -D STU –Tx Charges - C STU –Tx Losses - C STU –Tx Charges - D STU –Tx Losses - D SRLDC WRLDCNRLDC ERLDCSRLDC CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - C CTU –Tx Losses -C GENERATOR CONSUMER STU –Tx Charges - C STU –Tx Losses - C STU –Tx Charges - C STU –Tx Losses - C ( INTRA REGION) ( ADJACENT REGION) ( INTERVENING REGION) CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - C CTU –Tx Losses -C CTU Line STU Line

8 TN KAR GENERATOR CONSUMER STU –Tx Charges - C STU –Tx Losses - C CTU –DAC- C CTU –DL-C SRLDC STU –Tx Charges - C STU –Tx Losses -C CH HR GENERATOR CONSUMER STU –Tx Charges - C STU –Tx Losses - C STU –Tx Charges - C STU –Tx Losses -C WRLDCNRLDC HR ERLDCSRLDC GENERATOR CONSUMER STU –Tx Charges - C STU –Tx Losses - C STU –Tx Charges - C STU –Tx Losses - C NRLDC NEW MECHANISM Operating Charges : 1. KAR-SLDC 2. SRLDC 3. TN-SLDC 4. Application Fee Operating Charges : 1. CH-SLDC 2. WRLDC 3. NRLDC 4. HR-SLDC 5. Application Fee Operating Charges : 1. KAR-SLDC 2. SRLDC 3. ERLDC 4. NRLDC 5. HR-SLDC 6. Application Fee ( INTRA REGION) ( ADJACENT REGION) ( INTERVENING REGION) CTU –DAC- C CTU –DL-C CTU –DAC- C CTU –DL-C CTU –GAC- G CTU –GL-G CTU –DAC- C CTU –DL-C CTU –DAC- C CTU –DL-C CTU –GAC- G CTU –GL-G CTU –DAC- C CTU –DL-C CTU –GAC- G CTU –GL-G CTU Line STU Line

9 TN KAR GENERATOR CONSUMER STU –Tx Charges - G STU –Tx Losses - G SRLDC STU –Tx Charges - C STU –Tx Losses -C CH HR GENERATOR CONSUMER STU –Tx Charges - G STU –Tx Losses - G STU –Tx Charges - C STU –Tx Losses -C WRLDCNRLDC HR ERLDC SRLDC GENERATOR CONSUMER STU –Tx Charges - C STU –Tx Losses - C STU –Tx Charges - G STU –Tx Losses - G NRLDC Power Exchange – Old Mechanism Operating Charges : 1. KAR-SLDC 2. SRLDC 3. TN-SLDC 4. Application Fee Operating Charges : 1. CH-SLDC 2. WRLDC 3. NRLDC 4. HR-SLDC 5. Application Fee Operating Charges : 1. KAR-SLDC 2. SRLDC 3. ERLDC 4. NRLDC 5. HR-SLDC 6. Application Fee ( INTRA REGION) ( ADJACENT REGION) ( INTERVENING REGION) CTU Line STU Line CTU –Tx Charges - G CTU –Tx Losses -G CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - G CTU –Tx Losses -G CTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Ch- C CTU –Tx Ls-C CTU –Tx Ch- G CTU –Tx Ls-G CTU –Tx Ch- G CTU –Tx Ls-G CTU –Tx Ch- C CTU –Tx Ls-C CTU –Tx Ch- G CTU –Tx Ls-G CTU –Tx Ch- G CTU –Tx Ls-G CTU –Tx Ch- C CTU –Tx Ls-C CTU –Tx Ch- C CTU –Tx Ls-C

10 TN KAR GENERATOR CONSUMER STU –Tx Charges - G STU –Tx Losses - G CTU –DAC- C CTU –DL-C SRLDC STU –Tx Charges - C STU –Tx Losses -C CH HR GENERATOR CONSUMER STU –Tx Charges - G STU –Tx Losses - G STU –Tx Charges - C STU –Tx Losses -C WRLDCNRLDC HR ERLDC SRLDC GENERATOR CONSUMER STU –Tx Charges - C STU –Tx Losses - C STU –Tx Charges - G STU –Tx Losses - G NRLDC Power Exchange - New Mechanism Operating Charges : 1. KAR-SLDC 2. SRLDC 3. TN-SLDC 4. Application Fee Operating Charges : 1. CH-SLDC 2. WRLDC 3. NRLDC 4. HR-SLDC 5. Application Fee Operating Charges : 1. KAR-SLDC 2. SRLDC 3. ERLDC 4. NRLDC 5. HR-SLDC 6. Application Fee ( INTRA REGION) ( ADJACENT REGION) ( INTERVENING REGION) CTU –DAC- C CTU –DL-C CTU –DAC- C CTU –DL-C CTU –GAC- G CTU –GL-G CTU –GAC- G CTU –GL-G CTU –GAC- G CTU –GL-G CTU Line STU Line CTU –DAC- C CTU –DL-C CTU –GAC- G CTU –GL-G CTU –GAC- G CTU –GL-G CTU –DAC- C CTU –DL-C CTU –GAC- G CTU –GL-G CTU –DAC- C CTU –DL-C

11 CASE STUDY

12  Currently the transmission charges and losses are paid only by the beneficiaries (consumer). The new mechanism entails all users to pay transmission charges and losses for use, including the generators.  The new transmission pricing mechanism is beneficial and relatively cheaper for energy transactions in case of adjacent region and intervening region.  Encourage Generator and Consumers to connect with Central Transmission system for inter state sale & purchase respectively.  New Transmission Pricing Mechanism have an adverse impact on Intra State Energy Sale (huge increase in Transmission Charges).  Promote short term power transaction/Trading through Power Exchange (PX) and demotivate Bilateral short term power transaction/Trading.  STU Network is not the part of New Transmission Pricing Mechanism, therefore the effect of Pan- caking is not completely removed.  Typically wind resources are “embedded” in the state system. Wind Generators would benefit more from this new mechanism through better market access if the mechanism is applied at the state level.  Promote generation from solar based technology, as they don’t have to pay transmission charges and losses. CONCLUSION

13 Steps followed in the implementation of the Hybrid Methodology CREATION OF ZONES- DETERMINATION OF ZONAL CHARGES & LOSSES DETERMINATION OF SHARING OF YTC AND TRANSMISSION LOSSES HYBRID METHODOLOGY - FOR SHARING OF TRANSMISSION LOSSES HYBRID METHODOLOGY for DETERMINATION OF PoC TRANSMISSION CHARGES IDENTIFICATION OF SLACK NODES – Using Average Participation Method COMPUTATION : TRUNCATION OF INDIAN GRID AT 400KV- Shall be accepted when slack bus generation and voltage angle at generation & demand matches closely with AC Load Flow on the network COMPUTATION OF LOAD FLOWS ON BASIC NETWORK – IA shall run AC load flow to ensure Load/Generation Balance DATA ACQUISITION (Input to the Model) – Nodal Generation/Demand Information, Network Data

14 Region State CLASS C State CLASS C CLASS B CLASS A- Inter Regional Link CLASS B- Regional Link CLASS C- State Utility Link Inter Regional Link CLASS A Region Categories of Transmission System CLASS A : Inter Regional Link (CTU) CLASS B : Regional Network (CTU) CLASS C: State Utility Network (STU)

15 Procedure for Calculation of PoC Tariff NOTE:  Total Transmission Charges for each Class of network are predefined.  Depending upon the voltage Class (400KV, 220KV, 132KV) & line length, the total transmission charges for each line in that class of network is calculated.  After carrying out real power tracing, the load & generator entities using these lines are charged in proportion to their participation in the line flows. Point-of-Connection Tariff for a Zone. Aggregation of Locational Transmission Prices to form Zones. Calculation of Locational Transmission Price (Charges for Node). Calculation of Rate of a line in particular Class of Network. Defining the Total Transmission Charges for the particular Class of Network (Based on the Cost/ARR approved by the Commission)

16 Terminologies Used

17 Defining the Total Transmission Charges for the particular Class of Network 1.Total fixed charges to be recovered from a Inter Regional Link – TSC A 2.Total fixed charges to be recovered from a Regional link – TSC B 3.Total fixed charges to be recovered from a State utility Network – TSC C Calculation of Rate of a line in particular Class of Network

18 Calculation of Locational Transmission Price (Charges for Node) Aggregation of Locational Transmission Prices to form Zones

19 Point-of-Connection Tariff for a State

20 Computation of Transmission Losses Procedure : 1.Calculation of Marginal Loss Factor The marginal loss factors are multiplied by the generation / demand at these nodes under base case, 2.Loss Allocation Factor for Generation and Demand Nodes


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