Presentation on theme: "Sharing of ISTS Charges & Losses Regulation"— Presentation transcript:
1Sharing of ISTS Charges & Losses Regulation Prepared By:MangaljyotiSwapnil NayakMBA- 6th Batch“Point of Connection Transmission Pricing Methodology”
2INDIAN GRID NR NER ER WR SR CURRENT- Case States CTU Lines STU Lines HRNERERWRCHSRTNKARCURRENT- CaseStatesINTRA REGIONAL -KAR-TNADJACENT REGION-CH-HRINTERVENING REGION-KAR-ER-HRINDIAN GRIDREGIONAL GRIDCTU LinesSTU LinesSTATES
3IMPLEMENTING AGENCY (NLDC-2yrs) CERC (Sharing of Inter State Transmission Charges and Losses) Regulations, 2010Regulations shall apply to all Designated ISTS Customers, Inter State Transmission Licensees, NLDC, RLDC, SLDCs, and RPCsThe Central Transmission Network is considered for the calculation of charges & losses , which are applicable on the sameDIC’s , ISTS Transmission Licensees, NLDC,RLDC,SLDC & Other Relevant EntityCommercial + Technical InformationIMPLEMENTING AGENCY (NLDC-2yrs)IA Create Zones – Generation , DemandIA compute - PoC charges & LossesLTOA– Rs./MW/MonthSTOA – Rs,/MW/Hr Approved by RLDC/NLDCParticipation factor & PoC Charges shall be computed for :Day : Peak- 8 hours , Other than Peak- 16 hoursBlock of Months :April –June, July – Sep, Oct-Nov, Dec- Feb, MarchThe 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 ZonesThe 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.
4CERC (Sharing of Inter State Transmission Charges and Losses) Regulations, 2010 Solar generators connected to Central Transmission Lines not have to pay the Transmission Charges & LossesBilling 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/STUAccounting 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.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 Method50% of YTC by Point of Connection Method(After 2yrs Commission will review the weightage)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( ).Regulations shall come into force from , and unless reviewed shall remain in force for a period of 5 years
5Transmission Pricing Philosophy 1. Point-to-Point Tariff (Postage Stamp Charges & Losses – In Practice)Charges & Losses of Intermediate Transmission SystemTransmission Charges & Losses at the Point of DrawalTransmission Charges & Losses at the Point of InjectionPostage Stamp Charges & Losses2. Point-of-Connection Tariff (PoC Charges & Losses – New Mechanism)Demand Access Charges & Losses at the Point of DrawalGeneration Access Charges & Losses at the Point of InjectionPoint-of-Connection Charges & Losses
12CONCLUSIONCurrently 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.
13Steps followed in the implementation of the Hybrid Methodology DATA ACQUISITION (Input to the Model) – Nodal Generation/Demand Information, Network DataCOMPUTATION OF LOAD FLOWS ON BASIC NETWORK –IA shall run AC load flow to ensure Load/Generation BalanceCOMPUTATION : 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 networkIDENTIFICATION OF SLACK NODES – Using Average Participation MethodHYBRID METHODOLOGY for DETERMINATION OF PoC TRANSMISSION CHARGESHYBRID METHODOLOGY - FOR SHARING OF TRANSMISSION LOSSESDETERMINATION OF SHARING OF YTC AND TRANSMISSION LOSSESCREATION OF ZONES- DETERMINATION OF ZONAL CHARGES & LOSSES
14Categories of Transmission System CLASS A : Inter Regional Link (CTU)CLASS B : Regional Network (CTU)CLASS C: State Utility Network (STU)RegionRegionStateCLASS A- Inter Regional LinkCLASS BCLASS ACLASS B- Regional LinkStateCLASS C- State Utility LinkStateCLASS CInter Regional Link
15Procedure for Calculation of PoC Tariff Defining the Total Transmission Charges for the particular Class of Network (Based on the Cost/ARR approved by the Commission)Calculation of Rate of a line in particular Class of Network.Calculation of Locational Transmission Price (Charges for Node).Aggregation of Locational Transmission Prices to form Zones.Point-of-Connection Tariff for a Zone.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.
17Calculation of Rate of a line in particular Class of Network Defining the Total Transmission Charges for the particular Class of NetworkTotal fixed charges to be recovered from a Inter Regional Link – TSCATotal fixed charges to be recovered from a Regional link – TSCBTotal fixed charges to be recovered from a State utility Network – TSCCCalculation of Rate of a line in particular Class of Network
18Calculation of Locational Transmission Price (Charges for Node) Aggregation of Locational Transmission Prices to form Zones
20Computation of Transmission Losses Procedure :Calculation of Marginal Loss FactorThe marginal loss factors are multiplied by the generation / demand at these nodes under base case,Loss Allocation Factor for Generation and Demand Nodes