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Sharing of ISTS Charges & Losses Regulation
“Point of Connection Transmission Pricing Methodology”
Prepared By:Mangaljyoti
Swapnil NayakMBA- 6th Batch
Prepared By:Mangaljyoti
Swapnil NayakMBA- 6th Batch
INDIAN GRID
INDIAN GRID
HR
CH
KARTN
NERNER
NRNR
ERERWRWR
SRSR
REGIONAL GRID CTU Lines STU Lines STATES
CURRENT- Case States
INTRA REGIONAL - KAR-TN
ADJACENT REGION- CH-HR
INTERVENING REGION- KAR-ER-HR
IMPLEMENTING AGENCY (NLDC-2yrs)
IMPLEMENTING AGENCY (NLDC-2yrs)
DIC’s , ISTS Transmission Licensees, NLDC,RLDC,SLDC & Other Relevant
Entity
DIC’s , ISTS Transmission Licensees, NLDC,RLDC,SLDC & Other Relevant
Entity
Commercial + Technical Information
IA Create Zones – Generation , DemandIA compute - PoC charges & Losses LTOA– Rs./MW/MonthSTOA – Rs,/MW/Hr Approved by RLDC/NLDC
IA Create Zones – Generation , DemandIA compute - PoC charges & Losses LTOA– Rs./MW/MonthSTOA – Rs,/MW/Hr Approved by RLDC/NLDC
Participation 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, March
Participation 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, 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 RPCsRegulations 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 sameThe 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 ZonesThe 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.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.
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 Method50% 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 Method50% 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.
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
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).
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 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 & LossesSolar generators connected to Central Transmission Lines not have to pay the Transmission Charges & Losses
Transmission Pricing Philosophy
1. Point-to-Point Tariff (Postage Stamp Charges & Losses – In Practice)
2. Point-of-Connection Tariff (PoC Charges & Losses – New Mechanism)
Applicability of Transmission Charges & Losses
Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses
Generator - STU Consumer - STUC C C C C C
Generator - CTU Consumer - CTUC C C C C C
Generator - STU Consumer - STUC C C C C C C C
Generator - CTU Consumer - CTUC C C C
Generator - STU Consumer - STUC C C C C C C C C C
Generator - CTU Consumer - CTUC C C C C C
Charges Losses Charges Losses Charges Losses Charges Losses Charges LossesGenerator - STU Consumer - STU
C C DAC DAC C CGenerator - CTU Consumer - CTU
GAC GAC DAC DACGenerator - STU Consumer - STU
C C DAC DAC C CGenerator - CTU Consumer - CTU
GAC GAC DAC DACGenerator - STU Consumer - STU
C C DAC DAC C CGenerator - CTU Consumer - CTU
GAC GAC DAC DAC
STATE-N/W (Consumer)CTU-N/WCTU-N/W
(Consumer Region)
STATE-N/W (Generator)CTU-N/W
(Generator Region)CTU-N/W
CTU-N/W (Consumer Region)
STATE-N/W (Consumer)
CURRENT MECHANISM
REGION OPERATING CHARGES
REGION
NEW MECHANISM
OPERATING CHARGESSTATE-N/W (Generator)
CTU-N/W (Generator Region)
SLDC1 + RLDC2 + SLDC2 + AF
SLDC1 + RLDC2 + SLDC2 + AF
SLDC1 + RLDC1 + RLDC2 + SLDC2 + AF
SLDC1 + RLDC1 + RLDC2 + SLDC2 + AF
SLDC1 + RLDC1 + RLDC2 + RLDC3 + SLDC2 + AF
SLDC1 + RLDC1 + RLDC2 + RLDC3 + SLDC2 + AF
SLDC1 + RLDC2 + SLDC2 + AF
SLDC1 + RLDC2 + SLDC2 + AF
SLDC1 + RLDC1 + RLDC2 + SLDC2 + AF
SLDC1 + RLDC1 + RLDC2 + SLDC2 + AF
SLDC1 + RLDC1 + RLDC2 + RLDC3 + SLDC2 + AF
SLDC1 + RLDC1 + RLDC2 + RLDC3 + SLDC2 + AFINTERVENING
ADJACENT
INTRA
ADJACENT
INTERVENING
INTRA
N/W
STU
CTU
SLDC
RLDC
AF
C
GACDAC Demand Access Charges
Network
Central Transmission Utility
State Load Despatch Centre
Regional Load Despatch Centre
State Transmission Utility
Application Fees
Consumer- STU
Generation Access Charges
KARKAR
GENERATORGENERATOR
TNTN
OLD MECHANISM
CONSUMERCONSUMER
STU –Tx Charges - C STU –Tx Losses - C CTU –Tx Charges - C
CTU –Tx Losses -CSTU –Tx Charges - CSTU –Tx Losses -C
Operating
Charges :
1. KAR-SLDC
2. SRLDC
3. TN-SLDC
4. Application
Fee
CHCH
KARKAR HRHR
HRHR
Operating
Charges :
1. CH-SLDC
2. WRLDC
3. NRLDC
4. HR-SLDC
5. Application
Fee
Operating Charges :1. KAR-SLDC2. SRLDC3. ERLDC4. NRLDC5. HR-SLDC6. Application Fee
GENERATORGENERATOR CONSUMERCONSUMER
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
WRLDC NRLDC
NRLDCERLDCSRLDCCTU –Tx Charges - C CTU –Tx Losses -C CTU –Tx Charges - C
CTU –Tx Losses -C
CTU –Tx Charges - C CTU –Tx Losses -C
GENERATORGENERATORCONSUMERCONSUMER
STU –Tx Charges - C STU –Tx Losses - CSTU –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 - CCTU –Tx Losses -C
CTU –Tx Charges - C CTU –Tx Losses -C
CTU Line
STU Line
TNTN
KARKAR
KARKAR
GENERATORGENERATOR CONSUMERCONSUMER
STU –Tx Charges - C STU –Tx Losses - C
CTU –DAC- C CTU –DL-C
SRLDCSTU –Tx Charges - C STU –Tx Losses -C
CHCHHRHR
GENERATORGENERATOR CONSUMERCONSUMER
STU –Tx Charges - C STU –Tx Losses - C STU –Tx Charges - C
STU –Tx Losses -C
WRLDC NRLDC
HRHR
ERLDCSRLDC
GENERATORGENERATOR CONSUMERCONSUMER
STU –Tx Charges - C STU –Tx Losses - C
STU –Tx Charges - C STU –Tx Losses - C
NRLDC
NEW MECHANISMOperating
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-SLDC2. SRLDC3. ERLDC4. NRLDC5. HR-SLDC6. Application Fee
(INTRA REGION)
(ADJACENT REGION)
(INTERVENING REGION)
CTU –DAC- C CTU –DL-C
CTU –DAC- C CTU –DL-CCTU –GAC- G
CTU –GL-G
CTU –DAC- CCTU –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
TNTN
KARKAR
KARKAR
GENERATORGENERATOR CONSUMERCONSUMER
STU –Tx Charges - GSTU –Tx Losses - G
SRLDC
STU –Tx Charges - C STU –Tx Losses -C
CHCH HRHR
GENERATORGENERATORCONSUMERCONSUMER
STU –Tx Charges - G STU –Tx Losses - G STU –Tx Charges - C
STU –Tx Losses -C
WRLDC NRLDC
HR HRERLDC
SRLDC
GENERATORGENERATOR CONSUMERCONSUMER
STU –Tx Charges - C STU –Tx Losses - C
STU –Tx Charges - G STU –Tx Losses - G
NRLDC
Power Exchange – Old MechanismOperating
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-SLDC2. SRLDC3. ERLDC4. NRLDC5. HR-SLDC6. 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 - GCTU –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
TNTN
KARKAR
KARKAR
GENERATORGENERATOR CONSUMERCONSUMER
STU –Tx Charges - GSTU –Tx Losses - G
CTU –DAC- C CTU –DL-C
SRLDC
STU –Tx Charges - C STU –Tx Losses -C
CHCH HRHR
GENERATORGENERATORCONSUMERCONSUMER
STU –Tx Charges - G STU –Tx Losses - G STU –Tx Charges - C
STU –Tx Losses -C
WRLDC NRLDC
HR HRERLDCSRLDC
GENERATORGENERATOR CONSUMERCONSUMER
STU –Tx Charges - C STU –Tx Losses - C
STU –Tx Charges - G STU –Tx Losses - G
NRLDC
Power Exchange - New MechanismOperating
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-SLDC2. SRLDC3. ERLDC4. NRLDC5. HR-SLDC6. 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 LineCTU –DAC- CCTU –DL-C
CTU –GAC- G CTU –GL-G
CTU –GAC- G CTU –GL-G
CTU –DAC- CCTU –DL-C
CTU –GAC- G CTU –GL-G
CTU –DAC- CCTU –DL-C
CASE STUDY
Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses
BT- INTRA 35.42 4% 80 4.27% 28.97 1.75% 144.39 9.71% 144.39 9.71%EX- INTRA 135.42 8.10% 35.42 4% 100 4.27% 100 4.27% 28.97 1.75% 128.97 5.95% 264.39 13.56%
BT- INTRA 35.42 4.00% 144.4 5.30% 28.97 1.75% 208.79 10.68% 208.79 10.68%EX- INTRA 183.32 5.41% 35.42 4% 147.9 1.47% 144.4 5.30% 28.97 1.75% 173.37 6.96% 356.69 11.99%
Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses
BT- ADJACENT REGION 24.71 5% 80 4.50% 80 3.25% 190 4.23% 374.71 15.94% 374.71 15.94%EX- ADJACENT REGION 124.71 9.28% 24.71 5% 100 4.50% 100 3.25% 190 4.23% 290 7.34% 414.71 15.94%
BT- ADJACENT REGION 24.71 5.00% 142.1 3.71% 190 4.23% 356.81 12.39% 356.81 12.39%EX- ADJACENT REGION 147.91 8.57% 24.71 5% 123.2 3.76% 142.1 3.71% 190 4.23% 332.1 7.78% 480.01 15.69%
Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses Charges Losses
BT- INTERVENING REGION 35.42 4% 80 4.27% 80 2% 80 3.25% 190 4.23% 465.42 16.89% 465.42 16.89%EX- INTERVENING REGION 135.42 8.10% 35.42 4% 100 4.27% 100 3.25% 190 4.23% 290 7.34% 425.42 14.85%
BT- INTERVENING REGION 35.42 4.00% 142.1 3.71% 190 4.23% 367.52 11.47% 367.52 11.47%EX- INTERVENING REGION 183.32 5.41% 35.42 4% 147.9 1.47% 142.1 3.71% 190 4.23% 332.1 7.78% 515.42 12.77%
At Drawal Point (State)
At Injection Point (State)
Central Tx Utility N/w
Central Tx Utility N/w
Central Tx Utility N/w
State Tx Utility N/w
ADJACENT REGION TRANSACTIONTOTAL
NEW MECHANISM
ADJACENT(CH-HR)At Drawal Point
(State)At Injection Point
(State)State Tx Utility N/w
Central Tx Utility N/w
Central Tx Utility N/w
Central Tx Utility N/w
State Tx Utility N/w
At Drawal Point (State)
INTRA REGION TRANSACTIONGeneration Connected to STU
INTRA (KAR-TN)At Injection Point
(State)Central Tx Utility
N/w
STATE KARNATAKA
STATE TAMIL NADU
STATE KARNATAKA
STATE HARAYANA
Generation Connected to STU
Generation Connected to STU
OLD MECHANISM
INTERVENING REGION TRANSACTION
STATE CHATTISGARH
STATE HARAYANA
State Tx Utility N/w
Consumer Connected to STU
Consumer Connected to STU
OLD MECHANISM
NEW MECHANISM
State Tx Utility N/wCentral Tx Utility
N/wCentral Tx Utility
N/w
TOTAL
INTERVENING ( KAR-ER-HR)
OLD MECHANISM
NEW MECHANISM
Consumer Connected to STU
TOTALState Tx Utility N/w
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.
CONCLUSIONCONCLUSION
Steps followed in the implementation of the Hybrid Methodology
RegionRegion
State State
StateStateState
CLASS C
State
CLASS C
CLASS BCLASS A- Inter Regional Link
CLASS B- Regional Link
CLASS C- State Utility LinkInter 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)
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.
Terminologies Used Length of line lm in Class A
Length of line lm in Class B
Length of line lm in Class C
Factor reflecting Voltage class for line lm in Class A
Factor reflecting Voltage class for line lm in Class B
Factor reflecting Voltage class for line lm in Class C
Locational Transmission price for ith load
Locational Transmission price for kth generator
Contribution of ith load in MW flow of line/element lm
Contribution of kth generator in MW flow of line/element lm
Receiving end real power flow on line lm
= ith load in MW
= kth generation in MW
= Load/Demand weighted aggregated locational transmission price for qth State
= Generation weighted aggregated locational transmission price for qth State
Aggregate rate for qth State
Locational Transmission Price of ith load
Locational Transmission Price of kth generator
Load of qth State
Generation of qth State
= Point-of-Connection charges in Rs/MW for loads in qth State
= Point-of-Connection charges in Rs/MW for generators in qth State
Defining the Total Transmission Charges for the particular Class of Network
1. Total fixed charges to be recovered from a Inter Regional Link – TSCA2. Total fixed charges to be recovered from a Regional link – TSCB3. Total fixed charges to be recovered from a State utility Network – TSCC
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
=
=
is obtained by upstream tracing and is obtained by downstream tracing
Point-of-Connection Tariff for a State
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
For Generation Node k i
Recommended