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OPEN ACCESS EXPERIENCES and
WAY AHEAD
N.R.C BABUCHIEF MANAGER (MO), SRLDC, POWERGRID
10.08.2009
Open Access in Transmission:
Why and What ? Journey … Success Story… Issues… Way Ahead…
INSTALLED CAPACITY
NORTHERN :- 38,726 MW
EASTERN :- 20,815 MW
SOUTHERN :- 42,377 MW
WESTERN :- 46,348 MW
NORTH-EASTERN :- 2,256 MW
TOTAL 150,519 MWSOUTHERN
REGION
WESTERNREGION
EASTERN REGION
NORTHERN REGION
NORTH-EASTERN REGION
REGIONAL GRIDS
Coal
Hydro
Energy Resource Map
Source:
Powerline
(Siemens Ad),
Oct-2006
HYDRO RESOURCES
COAL BELT
MUMBAI
DELHI
CHENNAIBANGALORE
KOLKATTA
Resources are far away from Load centers.
Necessitates Long Transmission links for evacuation
AREAS SHOWN ARE APPROXIMATE AND INDICATIVE
Spatial Distribution
Of Load
Diversity details of Regional Grids in India
REGION REMARKS
Northern Region Deficit RegionHighly weather sensitive load
North Eastern Region
Very low loadHigh hydro potential
Eastern Region Low loadHigh coal reservesPit head base load plants
Western Region Industrial load and agricultural loadHighly Deficit Region
Southern Region High load (40% agricultural load)Monsoon dependent hydro
A strong transmission network backbone is essential in order to transfer the power across the length and breadth of the country :
- Due to high load growth and low generation avenues in Northern and Western Regions
- Due to low load and high generation in Eastern and North Eastern regions
- Due to high load growth and monsoon dependent generation availability in Southern Region
Necessity for strong transmission backbone …
MilestonesMilestones19891989 Unbundling of CS transmission from generation Unbundling of CS transmission from generation
- - (Formation of National Power Transmission (Formation of National Power Transmission
Corporation .. now POWERGRID) Corporation .. now POWERGRID)
19911991 Generation opened to Private Sector Generation opened to Private Sector
1995 Unbundling process started in States1995 Unbundling process started in States
- - State unbundled into Gencos, Transco & DiscomState unbundled into Gencos, Transco & Discom
19981998 Electricity (Amendment) Act 1998 Electricity (Amendment) Act 1998
1998 Electricity Regulatory Commission Act passed1998 Electricity Regulatory Commission Act passed
2003 Electricity Act 2003 enacted in June 20032003 Electricity Act 2003 enacted in June 2003
20042004 CERC Order and Regulations on OPEN ACCESS CERC Order and Regulations on OPEN ACCESS
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;”
A More general Definition of “Open Access”A More general Definition of “Open Access”
““Enabling of non-discriminatory Enabling of non-discriminatory
sale/ purchase of electric sale/ purchase of electric
power/energy between two parties power/energy between two parties
utilizing the system of an in- utilizing the system of an in-
between (third party), and not between (third party), and not
blocking it on unreasonable blocking it on unreasonable
grounds”grounds”
Scope/Applicability…
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:
As per CERC Regulations 2008 Clause 3
Agencies involved in Short-Term Open Access Transaction
• RLDC (s)• SLDC (s)• CTU• STU (s)• Buyer• Seller• Trader• Power
Exchanges
OPEN ACCESSOPEN ACCESS::
JOURNEY ... JOURNEY ...
Open Access in ISTS: Journey…
CERC Regulations on Open Access in Inter State Transmission implemented w.e.f. 6-May-2004.
CERC amended the above Regulations and the amended Regulations implemented w.e.f 01-04-2005.
CERC on 25-01-2008 amended the Regulations and the new Regulations are implemented w.e.f 01-04-2008.
CERC on 20.05.2009 amended the Regulations and the new Regulations are implemented w.e.f 15.06.2009
Open Access in ISTS: Open Access in ISTS: Journey…Journey…
Long Term : Twenty five years and aboveLong Term : Twenty five years and above - Life of the Assets about 25 years- Life of the Assets about 25 years
- Existing beneficiaries of a regional - Existing beneficiaries of a regional
transmission system owned or operated by transmission system owned or operated by
CTU- deemed long term customersCTU- deemed long term customers
- New Long Term Open Access customers: - New Long Term Open Access customers:
Require BPTA for inter-State transmissionRequire BPTA for inter-State transmission
Short Term : Which is not Long TermShort Term : Which is not Long Term - Essentially a Non firm service- Essentially a Non firm service
- The service may be curtailed if system - The service may be curtailed if system security demands. security demands.
Effective 01.04.2008 Regulations cover only Short-term Open
Access Transactions categorized as
- Bilateral
- Collective (through PX) Earlier Products of Short-Term retained under
Bilateral Transactions Nodal Agency
- Bilateral : RLDCs
- Collective : NLDC
Open Access in ISTS: Journey…CERC OA Regulations 2008
Open Access in ISTS: Journey…
Products –
Short term Access
- Advance
- First Come First Serve
- Day ahead
- Contingency
CERC OA Regulations 2008
Provisions relating to Long Term as per the Open Access Regulations, 2004 to continue, till CERC further notifies.
Long term Access
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 2
days open access charges. Moving towards empowerment of SLDCs
Open Access in ISTS: Journey… CERC OA Regulations 2009
STOA CASESTOA CASE
APTRANSCO to MPSEB
100 MW for One day from 0000 to 0600 hrs.
APTRANSCO - MPSEB THROUGH NVVNL APTRANSCO - MPSEB THROUGH NVVNL (0000 HRS – 0600 HRS)(0000 HRS – 0600 HRS) 100100 MW AT INJECTION POINT MW AT INJECTION POINT
INJECTING UTILITY APTRANSCO
CUSTOMER: NVVNL
DRAWEE UTILITY MPSEB
CAPACITY APPROVED 100 MW
DAILY PERIOD 0000-0600HRS
AP
WR GRID
MP
HVDC BACK TO BACK AT
BHADRWATHI IN WR
INTERVENING REGIONAL LINK
1. SR-WR
TRADER: NVVNL
APTRANSCO - MPSEB THROUGH NVVNL APTRANSCO - MPSEB THROUGH NVVNL (0000 HRS – 0600 HRS)(0000 HRS – 0600 HRS) 100100 MW AT INJECTION POINTMW AT INJECTION POINT
EXPORT AT AP 100 MW
AT SR PERIPHERY 96.9 MW
MP RECIEVES 93.0 MW
LOSSES IN SR 3.12%
LOSSES IN WR 4%
TOTAL LOSSES FOR
TRANSACTION 7.0 MW
AP
WR GRID
MP
HVDC BACK TO BACK AT
BHADRWATHI IN WR
CT
U
APTRANSCO - MPSEB THROUGH NVVNL APTRANSCO - MPSEB THROUGH NVVNL (0000 HRS – 0600 HRS)(0000 HRS – 0600 HRS) 100100 MW AT INJECTION POINTMW AT INJECTION POINT
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
TRANSMISSION CHARGES PER MW PER DAY
1. Rs 700.91 FOR CTU-SR
2. Rs 881.49 FOR SR-WR LINK
3. Rs 339.98 FOR CTU-WR
TOTAL TRANSMISSION CHARGE
PER UNIT 34.53Ps/.
SCHEDULING CHARGES PER DAY
1. Rs 3000 FOR SRLDC
2. Rs 3000 FOR WRLDC
AP
WR GRID
MP
HVDC BACK TO BACK AT
BHADRWATHI IN WR
Payments as per Regulation 2004 of CERC
ST Rate - in Rs/MW/Day
- Min. Charges for one day
APTRANSCO - MPSEB THROUGH NVVNL APTRANSCO - MPSEB THROUGH NVVNL (0000 HRS – 0600 HRS)(0000 HRS – 0600 HRS) 100100 MW AT INJECTION POINT MW AT INJECTION POINT
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
TRANSMISSION CHARGES PER MW PER DAY
1. Rs 700.91 FOR CTU-SR
2. Rs 881.49 FOR SR-WR LINK
3. Rs 339.98 FOR CTU-WR
TOTAL TRANSMISSION CHARGE
PER UNIT 13.52Ps/.
SCHEDULING CHARGES PER DAY
1. Rs 3000 FOR SRLDC
2. Rs 3000 FOR WRLDC
AP
WR GRID
MP
HVDC BACK TO BACK AT
BHADRWATHI IN WR
Payments as per Regulation 2004 Amendment 2005) of CERC
ST Rate - in Rs/MW/Day , - Charges as per continuous block of up to 6 hours, 12 hours, and more than 12 hours
APTRANSCO - MPSEB THROUGH NVVNL APTRANSCO - MPSEB THROUGH NVVNL (0000 HRS – 0600 HRS)(0000 HRS – 0600 HRS) 100100 MW AT INJECTION POINT MW AT INJECTION POINT
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
TRANSMISSION CHARGES
1. Rs 60 /MWH FOR WHEELING
TOTAL TRANSMISSION CHARGE
PER UNIT 7.83Ps/.
SCHEDULING CHARGES PER DAY
1. Rs 2000 FOR SRLDC
2. Rs 2000 FOR WRLDC
AP
WR GRID
MP
HVDC BACK TO BACK AT
BHADRWATHI IN WR
Payments as per Regulation 2008 of CERC
Comparison of CERC Regulations on Short-Term Open Access Comparison of CERC Regulations on Short-Term Open Access (Regulation 2004, Amendment 2005 and Regulations 2008)(Regulation 2004, Amendment 2005 and Regulations 2008)
Old RegulationsOld Regulations
(06.05.2004 to (06.05.2004 to 31.03.2005)31.03.2005)
Amended Amended RegulationsRegulations
(w.e.f. 01.04.2005 to (w.e.f. 01.04.2005 to
31.03.2008)31.03.2008)
Regulations, 2008 Regulations, 2008
(w.e.f. 01.04.2008)(w.e.f. 01.04.2008)
Total STOA Charges Paisa/Unit
34.53
Total STOA Charges Paisa/Unit
13.52
Total STOA Charges Paisa/Unit
7.83
Regulations, 2009 Regulations, 2009
(w.e.f. 15.06.2009)(w.e.f. 15.06.2009)
18.29Total STOA Charges Paisa/Unit
18.29
DETAILEDCASE STUDIES.ppt
OPEN ACCESSOPEN ACCESS::
SUCCESS STORY… SUCCESS STORY…
2800 MW2800 MW6200 MW6200 MW
1700MW1700MW
2500MW2500MW
1100 MW1100 MW
2100 MW2100 MW
38,018 MW
20,516
44,043 MW
2255
1250 MW1250 MW
IR Capacity=15,450 MWIR Capacity=15,450 MW((Till Sep 2009 = 17,650 MW)Till Sep 2009 = 17,650 MW)
Name of the LinkName of the Link Capacity(MW)Capacity(MW)
East-NorthEast-North
Pusauli-Sahupuri 220kV S/cPusauli-Sahupuri 220kV S/c 100100
Sasaram HVDC back-to-backSasaram HVDC back-to-back 500500
Muzaffarpur-Gorakhpur 400kV D/c (Quad)Muzaffarpur-Gorakhpur 400kV D/c (Quad) 20002000
Bihar Sharif-Balia Bihar Sharif-Balia 400kV400kV D/c (Quad) D/c (Quad) 12001200
Patna-Balia 400kV D/c (Quad)Patna-Balia 400kV D/c (Quad) 12001200
Sub-TotalSub-Total 50005000
East-WestEast-West
Budhipadar-Korba 220kV T/cBudhipadar-Korba 220kV T/c 400400
Rourkela-Raipur 400kV D/cRourkela-Raipur 400kV D/c 14001400
Sub-TotalSub-Total 18001800
West-NorthWest-North
Vindhyachal HVDC back-to-backVindhyachal HVDC back-to-back 500500
Existing 220kV AC LinesExisting 220kV AC Lines 500500
Gwalior-Agra 765kV S/cGwalior-Agra 765kV S/c 11001100
Sub-TotalSub-Total 21002100
East-SouthEast-South
Gazuwaka HVDC back-to-backGazuwaka HVDC back-to-back 10001000
Existing 220kV AC LinesExisting 220kV AC Lines 100100
Talcher-Kolar HVDC bipole (Enhanced)Talcher-Kolar HVDC bipole (Enhanced) 25002500
Sub-TotalSub-Total 36003600
West-SouthWest-South
Chandrapur HVDC back-to-backChandrapur HVDC back-to-back 10001000
Other linesOther lines 700700
Sub-TotalSub-Total 17001700
East-North EastEast-North East
Bongaigaon-Siliguri 400kV D/cBongaigaon-Siliguri 400kV D/c 10001000
Birpara-Salakati 220kV D/cBirpara-Salakati 220kV D/c 250250
Sub-TotalSub-Total 12501250
TotalTotal 1545015450
39,656 MW
IR LINKS CAPACITY
ER-NR400 kV Barh-Balia D/C: 1200 MWER-WR400 kV Ranchi-Sipat D/C: 1000 MW
Linked with Barh Project
EASTERN REGION
SOUTHERN REGION
WESTERNREGION
NORTHERN REGION
NORTH-EASTERN REGION
ALL INDIA ATC
ER
ATC = 800 MW
ATC = 750 MW ATC = 950 MW
ATC = 1375 MW
ATC = 1395 MW
ATC = 474 MW
ATC =226 MW
ATC = 920 MW
ATC = 900 MW
ATC = 900 MW
(Figure shown are for April-2008)
What Is ATC
12650 MW
3250 MW7250 MW
5000 MW
2700 MW3650 MW
37,700 MW OF INTER-REGIONAL POWER BY 2012
EASTERN REGION
SOUTHERN REGION
WESTERNREGION
NORTHERN REGION
NORTH-EASTERN REGION
INTER-REGIONAL TRANSFER BY END OF 11th PLAN (2012)
3000 MW
All India basis
778
3938
5933
9560
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
No.
Of
Tra
nsac
tion
s
2004-05 2005-06 2006-07 2007-08
YEAR
DETAILS OF TRADE UNDER SHORT TERM OPEN ACCESS
16.64 Bu
22.53 Bu
23.60 Bu
28.83 Bu
No. of Transactions
Energy in Billion Units
All India basis
737
845886
0
100
200
300
400
500
600
700
800
900
No.
Of
Tra
nsa
ctio
ns
2005-06 2006-07 2007-08
YEAR
DETAILS OF ADVNCE AND FCFS APPROVED STOA TRANSACTIONS
19.79 Bu
18.49 Bu
23.46 Bu
No. of Transactions
Energy in Billion Units
3201
5088
8674
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
No.
Of
Tra
nsa
ctio
ns
2005-06 2006-07 2007-08
YEAR
DETAILS OF DAY AHEAD AND SAME DAY APPROVED STOA TRANSACTIONS
2.74 Bu
5.11 Bu
6.37 Bu
No. of Transactions
Energy in Billion Units
AT A GLANCE 2008 – 2009AT A GLANCE 2008 – 2009 EXPORT
IMPORT
AT A GLANCE 2009 – 2010AT A GLANCE 2009 – 2010
IMPORT
Open Access – Success Story
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 %
Open Access – Success Story Transactions between extreme corners of
the countryRGCCPP ( Kayamkulam) to PSEBArunachal Pradesh(NER) to PSEBTNEB 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) - MSEDCLNCS Sugar(ANDHARA) – GUVNL
Indorama ( MAH) – APPCC ( ANDHRA)MORE DETAILS
Open Access – Success Story
Even costly power was harnessed to meet the high demand
RGCCPP ( Kayamkulam) (NAPTHA) to PSEBBSES(KERALA) (DIESEL) to NDMC (DELHI)
Diversity being gainfully utilised by Market players under STOA
Delhi/TNEB Export in night ; Import during evening peak
ANDHRA Export during evening peak ; Import in night
Generators PLF has also increased.Kayamkulam GPS
- (From 57 % in 2006-07 to 82 % in 2007-08- 82%)
OPEN ACCESSOPEN ACCESS::
ISSUES… ISSUES…
Open Access - Issues
Skewed load – generation pattern Constrained Transmission Network
under certain conditions Consents by STU/SLDC for injection of
power by embedded customers Telemetry Metering Scheduling PPAs
Open Access - Issues
UI Settlement of Intra state entities
- Before the Implementation of Open Access
Regulations 2008, for deviations different STU/SLDCs are charging differently for embedded customers.
- At times even the clearance was being withheld for want of approval philosophy.
In the New Open Access Regulations the issues are being addressed
OPEN ACCESSOPEN ACCESS::
WAY AHEAD… WAY AHEAD…
Open Access- Way Ahead…
Empowerment of SLDCs Intra State ABT Power Exchanges (Pxs) Easy and workable solutions to
tap micro/mini Non conventional
Energy Resources
Open Access- Way Ahead…Empowerment of SLDCs
- Greater role assigned to State Load Despatch Centre (SLDC) to
bring them at par with the Regional Load Despatch Centre (RLDC).
- unless specified otherwise by the concerned State Commission, the
UI rate for intra-State entity shall be 105% (for over-drawals/under
generation) and 95% (for under-drawals / over generation) of the UI
Rate at the periphery of regional entity. This has been done to
facilitate dispute free energy accounting and settlement of
deviations for intra-state entities located in the State where intra-
state ABT has not yet been implemented.
- Empowerment of SLDCs has been made technically and financially.
04/20/2304/20/23 POWERGRIDPOWERGRID 4343
ISGS-1 ISGS-2 ISGS-3
CTU / ISTS SYSTEM RLDC CORDINATES
INTER-STATE
INTRA STATE
STU/INTRA STATE SYSTEM
SGS-1 SGS-2 SGS-3
DISCOM-1 DISCOM-2 DISCOM-3
SLDC CO-ORDINATES
OPEN ACCESS CUSTOMER
~ ~ ~
~ ~ ~
•ISGS: Inter State Generating Stations•SGS: State Generating Stations•CTU: Central Transmission Utility•STU: State Transmission Utility
Inter-State ABT
Intra-State ABT
FURTHER IMPROVEMENT:FURTHER IMPROVEMENT:
INTRA-STATE ABTINTRA-STATE ABT
METERING
COMMERCIAL
INCENTIVES
OPEN-ACCESS
VAR
MANAGEMENT
GENCOS
PARTICIPATION
DISCOMS
SCHEDULES
Open Access- Way Ahead… A Power exchange facilitates equitable,
transparent and efficient trading of power. Bridges the demand supply mismatch by
bringing larger players together for buying and selling in an auction based system.
While maintaining complete anonymity, resolves the constraints in the earlier formats, Viz. search costs, asymmetric information, transaction costs, and counter-party risks.
Open Access- Way Ahead…
“collective transaction” means a set of transactions discovered in power exchange
Scheduling and open access for collective transactions discovered in a power exchange through anonymous simultaneous competitive bidding by buyers and sellers, presently on day-ahead basis.
Open Access- Way Ahead… The ATC declaration is to be done by NLDC on its
web site every day. Depending on the corridor availabilities the solution
is to be found out and the allowed trades will be intimated to NLDC.
If there is no congestion NLDC will accept the trades and issue the schedules to the power exchange and the same will be implemented in RLDC schedules.
In Power Exchange transactions both buyer and seller have to pay the Transmission and operating charges separately.
The transmission losses also have to be borne by the buyer and seller separately.
Typical Approvals- Captive Power PlantsTypical Approvals- Captive Power Plants Captive Power Plant Quantum( MW)
Eastern Region
NBVL(OPTCL) 27
SAIL-DSP(DVC) 20
TISCO(DVC) 60
Bhushan Steel 25
J.P Cement (Rewa) 5
Western RegionIndo Rama synthetics 22
PSKL 10-30
Southern Region
Renuka Sugar 25
Vishwanath Sugar 7.5
Godavari Sugar 25
Ugar Sugar 25
Jindal Steel 200
Nav Bharat 50
NCS Sugar 13 Back
TYPICALTYPICALSTOA CASE STOA CASE
KAYAMKULAM RGCCPP, NTPC to PSEB
150 MW for 31 days on Round the Clock basis
SR
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRSSTOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days150MW AT RGCCPP EXBUS POINT for 31 days
KE
RA
LA
INJECTING UTILITY RGCCPP,KSEB
TRADER: NVVNL
KAYAMKULAM RGCCPP NTPC)
DRAWEE UTILITY PSEB
CAPACITY APPROVED 150 MW
DAILY PERIOD 0000-2400 HRS
CUSTOMER: NVVNL
WR
NRPSEB
HVDC BACK TO BACK AT VINDHYACHAL IN WR
HVDC BACK TO BACK AT BHADRWATHI IN WR
INTERVENING REGION WR
INTERVENING REGIONAL LINK
SR-WR
WR-NRINTERVENING STATE TRANSMISSION UTILITY KSEB
SR
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRSSTOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days150MW AT RGCCPP EXBUS POINT for 31 days
KE
RA
LA
KAYAMKULAM RGCCPP(NTPC)
WR
NRPSEB
HVDC BACK TO BACK AT VINDHYACHAL IN WR
HVDC BACK TO BACK AT BHADRWATHI IN WR
EXPORT AT RGCCPP BUS 150 MW
PSEB RECIEVES 134.4 MW
AT KERALA PERIPHERY 148.9 MW
LOSSES IN KERALA 0.75%
LOSSES IN SR 3.12%
AT SR-WR PERIPHERY 144.3 MW
LOSSES IN WR 4.0%
AT WR-NR PERIPHERY 138.5 MW
LOSSES IN NR 3.0%
SR
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRSSTOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days150MW AT RGCCPP EXBUS POINT for 31 days
KE
RA
LA
KAYAMKULAM RGCCPP(NTPC)
WR
NRPSEB
HVDC BACK TO BACK AT VINDHYACHAL IN WR
HVDC BACK TO BACK AT BHADRWATHI IN WR
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
TRANSMISSION CHARGES PER MW PER DAY
1. Rs 700.91 FOR CTU-SR
2. Rs 881.49 FOR SR-WR LINK
3. Rs 339.98 FOR CTU-WR
4. Rs 233.32 FOR WR-NR LINK
5. Rs 649.86 FOR CTU-NR
6. Rs 672.07 FOR KSEB
SCHEDULING CHARGES PER DAY
1. Rs 3000 FOR SRLDC
2. Rs 3000 FOR WRLDC
3. Rs 3000 FOR NRLDC
4. Rs 3000 FOR KSEB
TOTAL TRANSMISSION CHARGES PER
UNIT 15.12Ps
Payments as per Regulation 2004 of CERC
SR
KE
RA
LA
KAYAMKULAM RGCCPP(NTPC)
WR
NR
HVDC BACK TO BACK AT VINDHYACHAL IN WR
HVDC BACK TO BACK AT BHADRWATHI IN WR
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
TRANSMISSION CHARGES PER MW PER DAY
1. Rs 843 FOR CTU-SR
2. Rs 1311 FOR SR-WR LINK
3. Rs 357 FOR CTU-WR
4. Rs 600 FOR WR-NR LINK
5. Rs 594 FOR CTU-NR
6. Rs 672.07 FOR KSEB
SCHEDULING CHARGES PER DAY
1. Rs 3000 FOR SRLDC
2. Rs 3000 FOR WRLDC
3. Rs 3000 FOR NRLDC
4. Rs 1000 FOR KSEB
TOTAL TRANSMISSION CHARGES PER
UNIT 18.5Ps
Payments as per Regulation 2004 Amendment 2005) of CERC
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRSSTOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days150MW AT RGCCPP EXBUS POINT for 31 days
PSEB
SR
KE
RA
LA
KAYAMKULAM RGCCPP(NTPC)
WR
NRPSEB
HVDC BACK TO BACK AT VINDHYACHAL IN WR
HVDC BACK TO BACK AT BHADRWATHI IN WR
APPLICATION PROCESSING FEE
Rs 5000 PER TRANSACTION
TRANSMISSION CHARGES PER MWHR
1. Rs 90 FOR Bilateral Wheeling
through one or more region
1. Rs 30 FOR KSEB
SCHEDULING CHARGES PER DAY
1. Rs 2000 FOR SRLDC
2. Rs 2000 FOR WRLDC
3. Rs 2000 FOR NRLDC
4. Rs 2000 FOR KSEB
TOTAL TRANSMISSION CHARGES PER
UNIT 12.2Ps
STOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRSSTOA OF KSEB(RGCCPP) - PSEB 0000 HRS – 2400 HRS150MW AT RGCCPP EXBUS POINT for 31 days150MW AT RGCCPP EXBUS POINT for 31 days
Payments as per Regulation 2008 of CERC
Comparison of CERC Regulations on Short-Term Open Access (Regulation 2004, Amendment 2005 and Regulations 2008)
Old Regulations
(06.05.2004 to 31.03.2005)
Amended Regulations
(w.e.f. 01.04.2005 to
31.03.2008)
Regulations, 2008
(w.e.f. 01.04.2008)
Total STOA Charges Paisa/Unit
15.12
Total STOA Charges Paisa/Unit
18.5
Total STOA Charges Paisa/Unit
12.2
Back
STOA OF NBVL(ORISSA) - APPCC (0000 – 2400 HRSSTOA OF NBVL(ORISSA) - APPCC (0000 – 2400 HRS) ) 5050 MW AT INJECTION POINT FROM 01.03.08 to 31.03.08MW AT INJECTION POINT FROM 01.03.08 to 31.03.08
ORISSA
SR
CTU
HVDC BACK TO BACK AT GAZUWAKA IN SR
ER
EXPORT AT NBVL(ORISSA) 50 MW
AT ER-SR PERIPHERY 47.05 MW
LOSSES IN ER 3%
LOSSES IN SR 3.12%
TOTAL LOSSES FOR TRANSACTION 4.42 MW
APPCC RECEIVES 45.58 MW
ANDHRA PRADESH
LOSSES IN OPTCL SYSTEM 3%
AT ER PERIPHERY 48.50 MW
NBVL
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.
NAVABHARAT(NBVL) (ORISSA)(ER) to
APPCC (ANDHRA)(SR)50 MW for 31 days on Round the Clock basis
4.10 Data and Communication Facilities Reliable and efficient speech and data communication systems shall be provided to facilitate necessary communication and data exchange, and supervision/control of the grid by the RLDC, under normal and abnormal conditions. All agencies shall provide Systems to telemeterpower system parameter such as flow, voltage and status of switches/transformer taps etc. in line with interface requirements and other guideline made available to RLDC / SLDC. The associatedcommunication system to facilitate data flow up to RLDC/SLDC, as the case may be, shall also be established by the concerned agency as specified by CTU in connection agreement. All agencies in coordination with CTU shall provide the required facilities at their respective ends and RLDC / SLDC as specified in the connection agreement.
FROM IEGC CLUASE 4.10
NAVABHARAT(NBVL) (ORISSA)(ER) to
APPCC (ANDHRA)(SR)
50 MW for 31 days on Round the Clock basis
Though the Parties have approached CERC, but the open access transaction is not through.
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 stated that if any petition is filed , the state commission shall consider the same. But the existing open access arrangement to continue.
Total Transfer Capability: TTCTotal Transfer Capability: TTC
Voltage Limit
Thermal Limit
Stability Limit
Total Transfer Capability
Total Transfer Capability is the minimum of the Thermal Limit, Voltage Limit and the Stability Limit
Time
Power Flow
Total & Available Transfer CapabilityTotal & Available Transfer Capability
ATC = TTC – RM
Reliability Margin (RM)
Long Term Open Access (LTOA)
Short Term Open Access (STOA)
TTC
ATC
-50
0
50
100
150
200
250
300
00
:00
01
:00
02
:00
03
:00
04
:00
05
:00
06
:00
07
:00
08
:00
09
:00
10
:00
11
:00
12
:00
13
:00
14
:00
15
:00
16
:00
17
:00
18
:00
19
:00
20
:00
21
:00
22
:00
23
:00
00
:00
48.2
48.4
48.6
48.8
49
49.2
49.4
49.6
49.8
50
SKEWED LOAD-GENERATION PATTERN
SR FREQUENCY
‘NEW’ GRID FREQUENCY
STOA FROM ‘NEW’ GRID
ON 17.04.09