1 / 43

OPEN ACCESS EXPERIANCES AND WAY AHEAD ON 28-04-2008

OPEN ACCESS EXPERIANCES AND WAY AHEAD ON 28-04-2008. IN WORKSHOP ON GRID SECURITY AND MANAGEMENT. V K Agrawal, General Manager. MILESTONES : TRANSMISSION SECTOR. Unbundling of CS transmission from generation (Formation of Power Transmission Corporation .. now POWERGRID)

kirby
Télécharger la présentation

OPEN ACCESS EXPERIANCES AND WAY AHEAD ON 28-04-2008

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. OPEN ACCESSEXPERIANCES ANDWAY AHEADON28-04-2008 IN WORKSHOP ON GRID SECURITY AND MANAGEMENT V K Agrawal, General Manager

  2. MILESTONES : TRANSMISSION SECTOR • Unbundling of CS transmission from generation (Formation of Power Transmission Corporation .. now POWERGRID) • Generation opened to Private Sector • Unbundling process started in States -Orissa Regulatory Commission Act introduced -State unbundled into Gencos, Transco & Discoms • Electricity Regulatory Commission Act passed • Process initiated for a comprehensive legislature • Electricity Act 2003 enacted in June 2003 2004 CERC Order and Regulations on OPEN ACCESS

  3. OPEN ACCESS IN INTER-STATE TRANSMISSION CERC has issued Regulations and the Open Access in Inter State Transmission implemented w.e.f. 6-May-2004. CERC has amended the above Regulations and the amended Regulations are implemented w.e.f 01-04-2005. CERC has amended the Regulations on 25-01-2008 and the new Regulations are implemented w.e.f 01-04-2008.

  4. Transmission Pricing : Objective • Promote efficient day-to-day operation of the bulk power market including power trading • Give Economic signal for efficient use of transmission resources • Give economic signal for transmission investment • Give economic signal for location of new generation and loads • Compensate the owner of the transmission system • Be simple and practical

  5. Diversity details of Regional Grids in India REGIONAL GRIDS NORTHERN REGION NORTH-EASTERN REGION EASTERN REGION WESTERNREGION SOUTHERN REGION Deficit Region Snow fed – run-of –the –river hydro Highly weather sensitive load Adverse weather conditions: Fog & Dust Storm CHICKEN-NECK Very low load High hydro potential Evacuation problems Low load High coal reserves Pit head base load plants Industrial load and agricultural load High load (40% agricultural load) Monsoon dependent hydro

  6. Transmission Capacity • Is a coordinated exercise • Transmission system developed as • Generation linked Associated Transmission System • Inter-regional schemes • Grid strengthening schemes • Beneficiaries identified apriori • Transmission system can be constructed only with commitment • N-1 criterion adopted • Optimum capacity • Inherent design margin available in the transmission system • To accommodate the variation of 15% unallocated power • Skewed dispatch scenarios • Actual margins available in the system • Generation outages, unbalanced load growth • Laws of physics prevail

  7. Transmission Capacity vs Transfer Capability

  8. Total Transfer Capability Voltage Limit Thermal Limit Power Flow Stability Limit Total Transfer Capability Time Total Transfer Capability is the minimum of the Thermal Limit, Voltage Limit and the Stability Limit

  9. Total & Available Transfer Capability Transfer Reliability Margin (TRM) Capacity Benefit Margin (CBM) TTC Long Term Open Access (LTOA) ATC Short Term Open Access (STOA) ATC = TTC – TRM – CBM

  10. INTER REGIONAL CAPACITIES 30,500 MW 37,486 MW 2,506MW 19,416 MW 16,000 42,420 MW 39,175 MW 10

  11. OPEN ACCESS: DEFINITION AS PER ELECTRICITY ACT, 2003 Section 2 (47) “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;”

  12. “Open Access’ means • Nondiscriminatory provision for use of transmission line or distribution system or associated facilities with such line or system by any licensee or consumer or a person engaged in generation in accordance with the regulations specified by the Appropriate Commission. • Under sub-section (2) of Section 38, CTU is obliged to provide nondiscriminatory open access to its transmission system for use by • (i) any licensee or generating company on payment of 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 transmission charges and a surcharge thereon as may be specified by the Central Commission

  13. OPEN ACCESS IN INTER-STATE TRANSMISSION Products – Long term Access Short term Access Monthly Advance First Come First Serve Day ahead Same Day transactions

  14. CATEGORY OF OPEN ACCESS CUSTOMERS • LONG TERM : TWENTYFIVE YEARS AND ABOVE • Life of the Assets about 25 years • Existing beneficiaries of a regional transmission system owned or operated by CTU- deemed long term customers • New Long Term Open Access customers: Require BPTA for inter-State transmission • SHORT TERM : WHICH IS NOT LONG TERM - Essentially a Non firm service • The service may be curtailed if system security demands.

  15. CERC Open Access Regulations, 2008 3.Subject to any other regulations specified by the Commission, the long-term customer shall have first priority for using the inter-State transmission system for the designated use. These Regulations shall apply for utilization of surplus capacity available thereafter on the inter-State transmission system by virtue of- (a)Inherent design margins; (b) Margins available due to variations in power flows; (c ) Margins available due to in-built spare transmission capacity created to cater to future load growth or generation addition:

  16. CERC Open Access Regulations, 2008 Effective 01.04.2008 Regulations cover only Short-term Open Access Transactions categorized as Bilateral and Collective (through PX) Earlier Products of Short-Term retained under Bilateral Transactions Nodal Agency Bilateral : RLDCs Collective : NLDC

  17. CERC Open Access Regulations, 2008 Transmission Charges moved from “Contract Path” to “Point of Connection” Both Buyers and Sellers of Collective transactions to bear transmission charges and absorb transmission losses Inter-Regional links -No Separate treatment. Emphasis on “Scheduling” rather than “Reservation” SLDC consent mandated along with application In case of Congestion – e-Bidding without Price Cap Exit Option provided with payment of up to 5 days open access charges. Moving towards empowerment of SLDCs

  18. Regulation 2004 of CERC Regulations on Short-Term Open Access (06.05.2004 to 31.03.2005) • Open Access Duration • - Up to One year maximum -single application possible • ST Rate • - in Rs/MW/Day - Min. Charges for one day • Transmission Charges • a. Intra Regional – 25% of Long Term Charges • b. Inter Regional – 25% of Long Term Charges • Operating Charges • a. Application fee – Rs. 5000/- • b. Scheduling Charges • – Rs. 3000/day for each RLDC involved • – Rs. 3000/day for each SLDC involved • c. Handling &Service Charges - 2% of total charges

  19. Regulation 2004 (Amendment 2005)of CERC Regulations on Short Term Open Access (01.04.2005 to 31.03.2008) • Open Access Duration • - Up to three months -single application possible • ST Rate • - in Rs/MW/Day • - Charges as per continuous block of up to 6 hours, 12 hours, • and more than 12 hours • Transmission Charges • a. Intra Regional – 25% of Long Term Charges • b. Inter Regional – 50% of Long Term Charges • Operating Charges • a. Application fee – Rs. 5000/- • b. Scheduling Charges • – Rs. 3000/day for each RLDC involved • – Rs. 1000/day for each RLDC involved • c. Handling &Service Charges - Nil

  20. Regulation 2008 of CERC Regulationson Short Term Open Access (From 01.04.2008) • Open Access Duration • - Bilateral -Up to 3 months separate application for each month • Collective: -Only Day ahead • ST Rate • - in Rs/MWh - Based on Scheduled Energy • Transmission Charges • Bilateral: • Rs.30/MWh – intra- regional • Rs.60/MWh – Between adjacent regions • Rs90/MWh – Wheeling through one or more region • Collective Transactions (Px): • -Rs. 30/MWh for each point of injection and drawal

  21. Regulation 2008 of CERC Regulationson Short Term Open Access Contd … Operating Charges Bilateral: a. Application fee – Rs. 5000/- b. Scheduling Charges – Rs. 2000/day for each RLDC involved – Rs. 2000/day for each SLDC involved c. Handling & Service Charges –Nil Collective Transactions: a. Application fee – Rs. 5000/- b. Scheduling Charges – Rs. 5000/day to NLDC for each State involved ; -NLDC to Share with RLDCs

  22. Comparison of CERC Regulations on Short-Term Open Access (Regulation 2004, Amendment 2005 and Regulations 2008)

  23. Comparison of CERC Regulations on Short-Term Open Access (Regulation 2004, Amendment 2005 and Regulations 2008)

  24. 649.86 516.03 967.58 1795.11 233.32 919.71 447.73 270.49 313.93 433.09 434.42 339.98 460.41 359.68 859.05 1462.44 2433.39 881.49 1128.39 700.91 614.15 STOA RATES 2004 AND 2005 AND 2008 NORTHERN REGION ER-NR NORTH-EASTERN REGION Transmission Charges: Bilateral: Rs.30/MWh – intra- regional Rs.60/MWh – Between adjacent regions Rs90/MWh – Wheeling through one or more region Collective Transactions (Px): -Rs. 30/MWh for each point of injection and drawal WR-NR WESTERNREGION NER-ER ER-WR EASTERN REGION SR-ER SR-WR SOUTHERN REGION

  25. All India basis

  26. All India basis

  27. All India basis

  28. STOA – EXPERIANCES Applications Processed (Since Beginning) > 20,000 No. Volume (Approved Energy) (Since Beginning) > 90BUs Applications Approved > 95 % Refusal/Non-consent by SLDCs > 3 - 4% Refusal due to system constraints < 0.5 %

  29. STOA – EXPERIANCES Transactions between extreme corners of the country RGCCPP ( Kayamkulam) to PSEB Arunachal Pradesh(NER) to PSEB TNEB to J&K Large number of Captive Generating plants used STOA and helped in enhancing the power availability in grid. Ugar Sugars (KAR) - JAIPUR (RAJASTHAN) Godavari Sugars (KAR) - MSEDCL NCS Sugar(ANDHARA) – GUVNL Indorama ( MAH) – APPCC ( ANDHRA)

  30. STOA – EXPERIANCES Due to High demand in the regions, the costly power has been traded through STOA RGCCPP ( Kayamkulam) (NAPTHA) to PSEB BSES(KERALA) (DIESEL) to NDMC (DELHI) Diversity being gainfully utilised by Market players under STOA Generators PLF has also increased.

  31. Issues Skewed load – generation levels Increased line loading Consents by STU/SLDC for injection of power by embedded customers Telemetry Metering Scheduling PPAs

  32. Empowering SLDCs UI Settlement of Intra state entities Before the Implementation of Open Access Regulations 2008, for deviations Various STU/SLDCs are charging differently for embedded customers. In the New Open Access Regulations the issue is addressed Functional Autonomy of SLDC

  33. Back

  34. TYPICALSTOA CASE KAYAMKULAM RGCCPP, NTPC to PSEB 150 MW for 31 days on Round the Clock basis

  35. SR STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days PSEB NR CUSTOMER: NVVNL TRADER: NVVNL HVDC BACK TO BACK AT VINDHYACHAL IN WR INJECTING UTILITY KYCPP,KSEB DRAWEE UTILITY PSEB WR INTERVENING REGION WR HVDC BACK TO BACK AT BHADRWATHI IN WR • INTERVENING REGIONAL LINK • SR-WR • WR-NR INTERVENING STATE TRANSMISSION UTILITYKSEB KERALA CAPACITY APPROVED 150 MW DAILY PERIOD 0000-2400 HRS KAYAMKULAM RGCCPP NTPC)

  36. LOSSES IN KERALA 0.75% AT KERALA PERIPHERY 148.9 MW LOSSES IN SR 3.12% AT SR-WR PERIPHERY 144.3 MW SR LOSSES IN WR 4.0% AT WR-NR PERIPHERY 138.5 MW STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days PSEB NR EXPORT AT RGCCPP BUS 150 MW HVDC BACK TO BACK AT VINDHYACHAL IN WR WR HVDC BACK TO BACK AT BHADRWATHI IN WR KERALA LOSSES IN NR 3.0% PSEB RECIEVES 134.4 MW KAYAMKULAM RGCCPP(NTPC)

  37. SR STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days Payments as per Regulation 2004 of CERC PSEB APPLICATION PROCESSING FEE Rs 5000 PER TRANSACTION NR • SCHEDULING CHARGES PER DAY • Rs 3000 FOR SRLDC • Rs 3000 FOR WRLDC • Rs 3000 FOR NRLDC • Rs 3000 FOR KSEB HVDC BACK TO BACK AT VINDHYACHAL IN WR WR HVDC BACK TO BACK AT BHADRWATHI IN WR • TRANSMISSION CHARGES PER MW PER DAY • Rs 700.91 FOR CTU-SR • Rs 881.49 FOR SR-WR LINK • Rs 339.98 FOR CTU-WR • Rs 233.32 FOR WR-NR LINK • Rs 649.86 FOR CTU-NR • Rs 672.07 FOR KSEB KERALA TOTAL TRANSMISSION CHARGES PER UNIT 15.12Ps KAYAMKULAM RGCCPP(NTPC)

  38. STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days SR Payments as per Regulation 2004 Amendment 2005) of CERC PSEB NR APPLICATION PROCESSING FEE Rs 5000 PER TRANSACTION • SCHEDULING CHARGES PER DAY • Rs 3000 FOR SRLDC • Rs 3000 FOR WRLDC • Rs 3000 FOR NRLDC • Rs 1000 FOR KSEB HVDC BACK TO BACK AT VINDHYACHAL IN WR WR HVDC BACK TO BACK AT BHADRWATHI IN WR • TRANSMISSION CHARGES PER MW PER DAY • Rs 843 FOR CTU-SR • Rs 1311 FOR SR-WR LINK • Rs 357 FOR CTU-WR • Rs 600 FOR WR-NR LINK • Rs 594 FOR CTU-NR • Rs 672.07 FOR KSEB KERALA TOTAL TRANSMISSION CHARGES PER UNIT 18.5Ps KAYAMKULAM RGCCPP(NTPC)

  39. STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days SR Payments as per Regulation 2008 of CERC PSEB NR APPLICATION PROCESSING FEE Rs 5000 PER TRANSACTION HVDC BACK TO BACK AT VINDHYACHAL IN WR • SCHEDULING CHARGES PER DAY • Rs 2000 FOR SRLDC • Rs 2000 FOR WRLDC • Rs 2000 FOR NRLDC • Rs 2000 FOR KSEB WR HVDC BACK TO BACK AT BHADRWATHI IN WR • TRANSMISSION CHARGES PER MWHR • Rs 90 FOR Bilateral Wheeling • through one or more region • Rs 30 FOR KSEB KERALA TOTAL TRANSMISSION CHARGES PER UNIT 12.2Ps KAYAMKULAM RGCCPP(NTPC)

  40. Comparison of CERC Regulations on Short-Term Open Access (Regulation 2004, Amendment 2005 and Regulations 2008) Back

  41. STOA OF NBVL(ORISSA) - APPCC (0000 – 2400 HRS) 50MW AT INJECTION POINT FROM 01.03.08 to 31.03.08 EXPORT AT NBVL(ORISSA) 50 MW LOSSES IN OPTCL SYSTEM 3% AT ER PERIPHERY 48.50 MW LOSSES IN ER 3% AT ER-SR PERIPHERY 47.05 MW ER HVDC BACK TO BACK AT GAZUWAKA IN SR LOSSES IN SR 3.12% ORISSA NBVL APPCC RECEIVES 45.58 MW SR CTU TOTAL LOSSES FOR TRANSACTION 4.42 MW ANDHRA PRADESH

  42. NAVABHARAT(NBVL) (ORISSA)(ER) to APPCC (ANDHRA)(SR) 50 MW for 31 days on Round the Clock basis Consent was not given by OPTCL by citing the following Reasons As per provision under chapter 4.11,10.5 of OGC Rule 2006 and order dated 29.10.2007 passed by Hon’ble OERC, the real time data of the CGP,(M/s NBVL) is yet to be received at the SLDC, Control Room. In absence of real time data monitoring facility, SLDC cannot comply the OGC provision under chapter 3.4(9) during contingency condition. Due to the above reasons the Request for Consent is not accepted.

  43. Consent was not given by KPTCL by citing the following Reasons The Sugar companies started trading of the surplus power by applying through open access . But initially KPTCL has not consented by citing the reason that the sugar companies are having PPA with ESCOMs. Later the Sugar companies have approached CERC and CERC allowed them to trade under open access. Aggreived by the order of CERC, KPTCL has approached the Appellate Tribunal. The Tribunal said that if any petition is filed , the state commission shall consider the same. But the existing open access arrangement to continue.

More Related