PRESENTATION ON INTRA

1
PRESENTATION ON INTRA STATE ABTBY GENERAL
MANAGER (SLDC) DELHI
2
INTRA STATE ABT IN DELHI
AS A FIRST IN THE WHOLE COUNTRY INTRA-STATE ABT
HAS BEEN IMPLEMENTED FOR DELHI w.e.f.
1-4-2007. AS PER THE ORDER OF DELHI
ELECTRICITY REGULATORY COMMISSIONDATED 31-3-2007

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Why Intra State ABT

• Intra-state ABT is a techno-economic
• tool for bringing rational tariff structure for
  supply of electricity from State generators to
  the distribution Licensees.
• It is a mechanism for enforcing discipline in
  the Grid.

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Benefits of Intra State ABT

• a) Benefits to the Power System
• Brings about grid discipline by maintaining
  frequency in prescribed band (49.5 to 50.5 Hz).
• Ensures optimum utilization of available
  generation capacities.
• Enhances opportunities for Open access, and
  Trading of electricity.
• Scope for encouraging competition among
  generators.

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• b) Benefits to the Generator
• Encourages maximization of Generation during peak
  hours with incentives and discourages the same
  during off-peak hours with penalties linked with
  frequency.
• Enables systematic scheduling in terms of long
  term, short term as well as day ahead, duly
  considering plant availability and maintenance.
• Ensures better life of equipments due to
  efficient management of Demand Vs Supply. Thereby
  the Hidden Costs due to damage is avoided.
• The three-part Tariff under ABT provides for
  proper recovery of fixed and variable costs of
  Generator.

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• c) Benefits to the Distribution Licensees
• Economic efficiency dictates that the least cost
  power should be dispatched in preference to
  costly power (Merit Order Dispatch). ABT provides
  for the same.
• Licensees can plan their requirement, both for
  peak and off peak demands.
• Enables efficient Load Management through their
  own Area Load Dispatch Centers.

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• d) Benefits to the End Users
• Enables open access, captive generation and
  trading of electricity.
• Ensures quality and reliable power supply.
• Scope for reduction in cost of power due to
  licensees opting for merit order dispatch in
  their scheduling.

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Constituents of Intra-State System after
restructuring of DVB

DELHI VIDYUT BOARD

All the assets and liabilities of DVB are
acquired by GNCTD
All the liabilities of DVB are transferred to
Holding Company, entire Equity of Holding Company
is issued to GNCTD

Holding Co.
Government of National Capital Territory of Delhi
Distribution Licensees
Genco
Transco
BRPL
BYPL
NDPL
NDMC
MES
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CONSTITUENTS OF INTRA-STATE ABT in DELHI

1. BSES RAJDHANI POWER CO. LTD.
2. BSES YAMUNA POWER CO. LTD.
3. NORTH DELHI POWER CO. LTD.
4. NEW DELHI MUNICIPAL COUNCIL.
5. MILITARY ENGINEERING SERVICES.
6. IP STATION.
7. RPH STATION.
8. GT STATION.
9. PRAGATI STATION.
10. BADARPUR THERMAL POWER STATION.

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Power Allocation to Distribution Licensees

• POWER PURCHASE AGREEMENTS HAVE BEEN
  ASSIGNED TO THE DISTRIBUTION LICENSEES BY THE
  ORDER OF DERC DATED 31.3.2007. THE SALIENT
  FEATURES OF PPA ASSIGNMENT ARE AS UNDER -
• NDMC MES have been allocated 350 MW 50 MW
  respectively from the BTPS generating station as
  basic allocation.
• Allocation from other Central Sector and State
  Sector has been assigned to BRPL, BYPL NDPL in
  line with their consumption pattern for the
  period 1.7.2002 to 28.2.2007.
• 15 of BTPS (after allocation to NDMC and MES)
  DADRI NCTPS thermal) IPRPHPPCLGT has been
  considered as un-allocated share and is placed at
  the disposal of the Govt of NCT of Delhi.
• In case the allocation of the un-allocated power
  is not made by the government the same would be
  allocated to the distribution licensees except
  NDMC and MES in proportion to the basic
  allocation.

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Power Allocation Table

• ON THE BASIS OF DERC ORDER DATED 31.3.2007,
  THE SOURCE-WISE ALLOCATION OF POWER TO THE
  DISTRIBUTION LICENSEES HAS BEEN COMPUTED AS UNDER
  FOR SCHEDULING PURPOSES -

  LICENSEES 'ALLOCATION IN ' LICENSEES 'ALLOCATION IN ' LICENSEES 'ALLOCATION IN ' LICENSEES 'ALLOCATION IN '  
SOURCE NDMC MES NDPL BRPL BYPL TOTAL
C. SECTOR 0 0 29.18 43.58 27.24 100
BTPS 49.65 7.09 12.62 18.85 11.78 100
IP 0 0 29.18 43.58 27.24 100
RPH 0 0 29.18 43.58 27.24 100
GT 0 0 29.18 43.58 27.24 100
PRAGATI 0 0 29.18 43.58 27.24 100
HIMACHAL 0 0 33.33 33.34 33.33 100
DVC 0 0 29.18 43.58 27.24 100
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Details of Unallocated Quota of Power available
with Govt of Delhi
S. No. Description Formula Un-allocated power in MW
1. 15 of Balance power of BTPS after allocation of 350 MW to NDMC 50 MW to MES (705-350-50)15 46 MW
2. 15 of Dadri (Thermal) Capacity (756)15 113 MW
3. 15 of (IPRPHGTPPCL) (185135282330)15 140 MW
TOTAL TOTAL TOTAL 299 MW
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Steps Taken By SLDC Delhi For Implementation of
Intra-State ABT

• The Scheduling Dispatch procedures finalized
  with stake holders
• on 31.3.2007.
• All Distribution Licensees authorized SLDC to
  schedule available
• resources as per the requirement of Grid in
  line with the IEGC
• provisions section 6.5(5) which stipulates as
  under
• The SLDCs may also give standing instructions
  to the RLDC such
• that the RLDC itself may decide the drawal
  schedules for the States.
• This ensures centralized scheduling for
  optimum utilization of available
• sources to Delhi as a whole. This procedure
  has been in existence since
• December 2002 i.e. the date of implementation
  of ABT in NR.

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• SCHEDULING GUIDELINES CONSTITUENTS
• 1. While requisitioning power requirement
  ,minimum technical requirement to ensure the
  continuity of the generating stations and
  maximum availability should be taken care of by
  DISCOMs. The requisition from central sector gas
  stations should not be less than 70 of the
  respective availability capacity in normal
  conditions and 50 under emergency conditions.
  As far as Hydro and Nuclear stations are
  concerned, the entire availability would be
  utilized at all the times. However the storage
  capacity of Hydro stations is exploited by RLDC
  depending upon the requirement of the grid.
• 2. Requisition for BTPS should not be less than
  80 due to size and age of the machines.
• 3. PPCL cannot go beyond 80 due to pollution
  stipulations.
• Full requisition should be there for IP and
  RPH considering their age and core generation.
• 5. Due to size pollution stipulation for
  IPGCLs GT, it should not be less than 70.

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PROCESS FOR SCHEDULING BY 1000 HRS ISGS shall
advise NRLDC the station wise MW and MWH
capabilities. BY 1000 HRS BTPS,GENCO and PPCL
shall declare the availability in 15 minutes time
block in terms of MW and MWH. BY 1100
HRS Entitlement of the state shall be posted by
NRLDC in their website www.nrldc.org for central
sector. BY 1100 HRS SLDC shall post the
GENCO,PPCL and BTPS availability in its website
www.delhisldc.org BY 1300 HRS NDPL,BRPL,BYPL,ND
MC and MES shall intimate the SLDC, source-wise
requirement of power for succeeding day in
terms in MW and MWH in 15 minutes time
block. BY 1500 HRS SLDC shall assess the
requirement of power from all sources and
intimate the same to NRLDC. BY 1700 HRS NRLDC
shall convey the net drawal schedule for Delhi
and posted in the website. BY 1800 HRS SLDC
shall post the provisional Drawal Schedule and
Generation Schedule of Generating stations within
Delhi based on the provisional Drawal schedule
of Delhi as a whole posted on the NRLDC
website. BY 1900 HRS GENCOs/Licensees shall
alter the schedule of generation /requirement
and intimate the same to SLDC for forwarding
the same to NRLDC for incorporation in final
drawal schedule of Delhi. BY 2200 HRS SLDC
shall inform the modification if any,for
incorporating in the final drawal schedule to
NRLDC. BY 2300 HRS NRLDC shall issue the final
drawal schedule of Delhi state along with other
states and posted in their website. BY 2330
HRS SLDC shall compute the drawal schedule of
DISCOMs and generation schedule of generating
stations within Delhi based upon the
availability from central sector stations
bilateral agreements entered into by various
distribution licensees for the next day.
Intra-day scheduling as per IEGC provisions is
also permitted.

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DRAWAL SCHEDULES IN INTRA-STATE ABT
17
GENERATION SCHEDULES IN INTRA-STATE ABT
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ABT BILLING METHODOLOGY

• ABT is, basically, a three part tariff system
  consisting of the following components -
• Fixed charges on monthly basis subject to
  adjustment on yearly basis.
• Variable charges - on monthly basis.
• Unscheduled inter-change (UI) charges. on
  weekly basis.

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FIXED CHARGES

• The Fixed Charges are to be paid to the
  Generating Source on the basis of allocation
  irrespective of the drawal provided the
  generating stations attain respective
  availability factor prescribed by the appropriate
  Regulatory Commissions. For Central sector
  Thermal and Gas Stations the availability factor
  is fixed at 80 whereas for Hydro Stations the
  availability factor (capacity index) is 90
  except few stations i.e. Tanda Talchar Thermal
  stations. The nuclear stations are not covered
  under the ABT.

VARIABLE CHARGES

• The Variable Charges are to be paid to the
  Generating sources on the basis of scheduled
  allocation fixed by the Regional Load Despatch
  Centre keeping in mind the technical limits for
  regulation of generation. The limit is 70 of the
  maximum available capacity for thermal stations
  whereas that of Gas stations it is 60 in normal
  conditions and 50 in extreme emergency condition
  as fixed by RPC Forum.
• As far as Hydro and Nuclear stations are
  concerned, the entire availability would be
  utilized at all the times. However the storage
  capacity of Hydro stations is exploited by RLDC
  depending upon the requirement of the grid.

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UNSCHEDULED INTER-CHANGE (UI) CHARGES

• The UI for a Generating Station shall be equal to
  its actual generation minus its scheduled
  generation. UI for States shall be equal to its
  total actual drawal minus its total scheduled
  drawal.
• UI shall be worked out for each 15 minutes time
  block. Charges for all UI transactions are based
  on average frequency of the time block.
• The UI Tariff structure as on 31.3.2007 is as
  under.

Average Frequency of time-block UI Rate (P/kWh)
----------------------------------------
----------------------------------- 50.5 Hz and
above 0.00 Below 50.50 Hz and upto 50.48 Hz
6.00 Below 49.04 Hz and upto 49.02 Hz 561.00
Below 49.02 Hz 570.00 Between 50.50 Hz and
49.82 Hz Linear in 0.02 Hz steps _at_ 6 P/kWh
for each step Below 49.82 Hz Linear in 0.02
Hz steps _at_ 9P/kWh for each step
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AS PER THE INTRA-STATE ABT ORDER OF DERC THE
INTRA-STATE UI RATE WOULD BE THE RATE DECIDED BY
CERC AS ON 31.3.2007. THE RATES OF UI FOR THE
FREQUENCY BAND 49.0 Hz TO 50.5 Hz ARE AS UNDER

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PROPOSED NEW UI RATES

• CERC vide Press Release dated 7-4-2007 has
  proposed the New UI Vector for enforcing strict
  Grid discipline as given below

Average Frequency of time-block UI Rate (P/kWh)
----------------------------------------
----------------------------------- 50.5 Hz and
above 0.00 Below 50.50 Hz and upto 50.48 Hz
6.00 Below 49.52 Hz and upto 49.50 Hz 345.00
Below 49.02 Hz 745.00 Between 50.50 Hz and
49.82 Hz Linear in 0.02 Hz steps _at_ 6 P/kWh
for each step Between 49.80 Hz and
49.52 Hz Linear in 0.02 Hz steps _at_ 9P/kWh
for each step Between 49.50 Hz and 49.02
Hz Linear in 0.02 Hz steps _at_ 16P/kWh for
each step
COMMENTS ARE INVITED BY CERC BY 23rd APRIL 2007
ON THE ABOVE PROPOSAL FOR REVISION OF UI VECTOR.
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IF THE PROPOSAL OF CERC IS IMPLEMENTED THE RATES
FOR UI FOR THE FREQUENCY BAND BETWEEN 49.0 Hz
50.5 Hz WOULD BE AS UNDER

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Intra State UI Pool Account
SLDC has been mandated by the DERC order dated
31.3.2007, Para No. 18(3) to maintain the
Intra-State UI Account which states as under

• SLDC Shall act as the Nodal Agency for
  collection and Distribution of UI charges as far
  as intra-state ABT is concerned. As regards
  regional ABT, a settlement mechanism shall
  immediately be worked out together by the STU,
  SLDC and Discoms (who are represented in the RPC)
  in consultation with NRLDC.

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UI SETTLEMENT MECHANISM IN INTRA-STATE ABT

• At Inter state level the Unscheduled
  interchanges of central sector and Inter regional
  sources are determined with reference to their
  schedule at the point of injection but those of
  SEBs with reference to their ex-periphery
  schedule. Datum for working out UI not being same
  for all entities, this results in UI MISMATCH
  which is equalised by averaging the two ON DAILY
  BASIS.
• The above adjustment is required to equalize
  payable UI amount to receivable UI amount so that
  UI pool account is maintained as a Zero balance
  account.

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METHODOLOGY FOR ZERO BALANCING THE UI POOL
ACCOUNT AT INTER-STATE LEVEL

• UI AMOUNT IS DRAWN FOR ALL THE UI POOL MEMBERS
  ON ACTUAL BASIS.
• FROM THE UI ACCOUNT AMOUNT RECEIVABLE MEMBERS AND
  AMOUNT PAYABLE MEMBERS TO THE POOL IS SEPERATELY
  DRAWN OUT.
• AMOUNT PAYABLE AND RECEIVABLE WILL NOT MATCH
  BECAUSE FOR GENERATORS THE UI IS DRAWN OUT BASED
  ON INJECTION SCHEDULE AT GENERATOR PERIPHERY
  WHEREAS FOR STATES THE SAME IS BASED ON DRAWAL
  SCHEDULE AT STATE PERIPHERY.
• AS PER THE CERC STIPULATION THE UI POOL ACCOUNT
  SHOULD BE A ZERO BALANCE ACCOUNT.
• AT RPC LEVEL THE UI MISMATCH i.e. THE DIFFERENCE
  BETWEEN UI PAYABLE RECEIVABLE IS EQUALIZED BY
  AVERAGING THE TWO ON DAILY BASIS. HOWEVER THE UI
  OVER HVDC AND OTHER INTER-REGIONAL LINKS IS
  RETAINED WITHOUT ANY ADJUSTMENT.
• THE UI MIS-MATCH IS CALCULATED ON DAILY BASIS AND
  APPORTIONED TO ALL UI POOL MEMBERS IN THE RATIO
  5050 TO THE PAYING AND RECEIVING MEMBERS IN THE
  RATIO OF THE ORIGINAL UI AMOUNT DRAWN OUT.
• 7. A CASE STUDY BASED ON THE ABOVE METHODOLOGY
  FOR 19-3-2007 UI ACCOUNT ISSUED BY NRPC IS SHOWN
  IN THE NEXT SLIDE.

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SAMPLE CASE FOR 19TH MARCH 2007
ACTUAL UI AMOUNT FOR PAYEE AND RECEIVING
CONSTITUENTS

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METHODOLOGY FOR ZERO BALANCING THE UI POOL
ACCOUNT AT INTER-STATE LEVEL

• MIS-MATCH BETWEEN THE PAYABLE AND RECEIVABLE
  AMOUNT FROM THE UI ACCOUNT IS (903.0818-820.2534)
  82.8285 LACS RUPEES.
• THIS DIFFERENCE IS DIVIDED EQUALLY BETWEEN THE
  TWO i.e. PAYING RECEIVING ENTITIES IN THE
  RATIO 5050 AMOUNTING TO 41.41423 LACS RUPEES
  EACH.
• SINCE NO INTER-REGIONAL LINK IS AMONGST THE
  RECEIVING UTILITES 41.41423 LACS IS DIVIDED
  AMONGST ALL THE RECEIVING UTILITIES IN
  PROPORTION TO THEIR UNADJUSTED UI AMOUNT.
• AMONGST THE PAYING UTLITIES EXCLUDING THE
  INTER- REGIONAL LINKS THE AMOUNT OF 41.41423 LACS
  IS CREDITED TO ALL IN PROPORTION TO THEIR
  UNADJUSTED UI AMOUNT.
• THE ADJUSTED ACCOUNTS ARE DISPLAYED IN THE NEXT
  SLIDE.

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ADJUSTED UI ACCOUNT FOR PAYEE AND RECEIVING
CONSTITUENTS

30
In Intra State ABT also the UI account should
be a Zero Balance Account which indicates UI
payable/receivable to/from the Regional UI pool
account should be equal to the UI
receivable/payable in the Intra-State UI pool
Account.The following mechanism is proposed
1. STU/SLDC shall draw-out the Intra-state UI
account in same principle as that of
Inter-state UI account.2. As mentioned in case
of inter-state level the Unscheduled
interchanges of Generating stations within
Delhi are to be determined with reference to
their schedule at the point of injection but for
Distribution Licensees with reference to their
ex-periphery ( at the licensees periphery)
schedule. 3. The amount payable / receivable
to the Regional pool account would then be
equated on the basis of Intra-state ABT amount.
METHODOLOGY FOR ZERO BALANCING THE UI POOL
ACCOUNT AT INTRA-STATE LEVEL

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SAMPLE CASE FOR INTRA-STATE ABT SETTLEMENT
ACTUAL UI AMOUNT FOR PAYEE AND RECEIVING
CONSTITUENTS

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METHODOLOGY FOR ZERO BALANCING THE UI POOL
ACCOUNT AT INTER-STATE LEVEL

• MIS-MATCH BETWEEN THE PAYABLE AND RECEIVABLE
  AMOUNT FROM THE UI ACCOUNT IS (536.268-505.000)
  31.268 LACS RUPEES.
• THIS DIFFERENCE IS DIVIDED EQUALLY BETWEEN THE
  TWO i.e. PAYING RECEIVING ENTITIES IN THE
  RATIO 5050 AMOUNTING TO 15.634 LACS RUPEES
  EACH.
• AMONGST THE RECEIVING UTILITES 15.634 LACS IS
  DIVIDED AMONGST ALL THE RECEIVING UTILITIES IN
  PROPORTION TO THEIR UNADJUSTED UI AMOUNT.
• AMONGST THE PAYING UTLITIES EXCLUDING THE
  INTER- STATE ACCOUNT THE AMOUNT OF 15.634 LACS IS
  CREDITED TO ALL IN PROPORTION TO THEIR
  UNADJUSTED UI AMOUNT.
• THE ADJUSTED ACCOUNTS ARE DISPLAYED IN THE NEXT
  SLIDE.

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ADJUSTED UI ACCOUNT FOR PAYEE AND RECEIVING
CONSTITUENTS

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ACCOUNTING METHODOLOGY FOR MONTHLY ENERGY ACCOUNTS

• FOR GENERATING STATIONS WITHIN DELHI
• SLDC SHALL COMPUTE
• A) STATIONWISE AVAILABILITY BASED ON THE DECLARED
  CAPACITY BY GENERATING STATIONS ON REAL TIME
  BASIS AS PER THE PROVISIONS OF IEGC. (IEGC
  STIPULATES
• TO DISCOURAGE FRIVOLOUS REVISIONS, RLDC (IN
  DELHIS CASE, SLDC) MAY, AT ITS SOLE DISCRETION,
  REFUSE TO ACCEPT SCHEDULE / CAPABILITY CHANGES OF
  LESS THAN TWO (2) PERCENT OF THE PREVIOUS
  SCHEDULE / CAPABILITY).
• THESE WOULD BE COMPILED ON MONTHLY AND
  CUMMULATIVE FINANCIAL YEAR BASIS IN PERCENTAGE.

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• THE SOURCEWISE ALLOCATION WOULD ALSO BE DRAWN
  OUT BY SLDC BASED ON DERC ORDER ON TIME TO TIME
  ON MONTHLY AND CUMMULATIVE FINANCIAL YEAR BASIS
  IN PERCENTAGE.
• SCHEDULED ENERGY FOR THE MONTH DRAWN OUT FROM
  DAILY IMPLEMENTED SCHEDULES PREPARED ON 15
  MINUTES TIME BLOCKS.
• D) INCENTIVE ENERGY ON MONTHLY BASIS AND
  CUMMULATIVE FINANCIAL YEAR BASIS PAYABLE BY THE
  DISTRIBUTION LICENSEES SHALL BE COMPUTED FOR THE
  ENERGY SCHEDULED FROM THE STATIONS BEYOND THE
  TARGET PLF FIXED FOR INCENTIVE PURPOSE FIXED BY
  THE APPROPRIATE COMMISSION.

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• 2 FOR CENTRAL SECTOR
• AFTER ISSUANCE OF NRPC ACCOUNTS IN RESPECT OF
  ISGS AND OTHER SHARED GENERATING STATIONS, SLDC
  SHALL COMPUTE FOLLOWING
• SOURCE WISE ALLOCATION OF THE SOURCES ON
  MONTHLY AND CUMULATIVE FINANCIAL YEAR BASIS IN
  PERCENTAGE AS SHOWN BELOW

  LICENSEES 'ALLOCATION IN ' LICENSEES 'ALLOCATION IN ' LICENSEES 'ALLOCATION IN ' LICENSEES 'ALLOCATION IN '  
SOURCE NDMC MES NDPL BRPL BYPL TOTAL
C. SECTOR 0 0 29.18 43.58 27.24 100
BTPS 49.65 7.09 12.62 18.85 11.78 100
IP 0 0 29.18 43.58 27.24 100
RPH 0 0 29.18 43.58 27.24 100
GT 0 0 29.18 43.58 27.24 100
PRAGATI 0 0 29.18 43.58 27.24 100
HIMACHAL 0 0 33.33 33.34 33.33 100
DVC 0 0 29.18 43.58 27.24 100
B) SOURCEWISE SCHEDULED ENERGY TO EACH
DISTRIBUTION LICENSEES BASED ON THE DAILY
IMPLEMENTED SCHEDULES. C) SOURCEWISE
INCENTIVE ENERGY FOR THERMAL AND GAS STATIONS ON
MONTHLY BASIS AND CUMMULATIVE FINANCIAL YEAR
BASIS. CENTRAL SECTOR GENERATING STATIONS AND
GENERATING STATIONS WITHIN DELHI SHALL RAISE
BILLS ON MONTHLY BASIS BASED ON THESE ACCOUNTS
ISSUED BY SLDC.
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3 CENTRAL SECTOR TRANSMISSION CHARGES

• FOR TRANSMISSION CHARGES BILL, NRPC ISSUES THE
  WEIGHTED AVERAGE PERCENTAGE SHARE OF CENTRAL
  SECTOR GENERATING CAPACITY BASED ON WHICH
  TRANSMISSION CHARGES ARE PAYABLE TO PGCIL.
• THESE CHARGES WOULD FURTHER BE BIFURCATED AS PER
  SLDC COMPUTATION OF CENTRAL SECTOR ALLOCATION TO
  DISTRIBUTION LICENSEES IN DELHI.
• AT PRESENT, NO CENTRAL SECTOR TRANSMISSION
  CHARGES ARE APPLICABLE TO NDMC AND MES AS BOTH
  ARE NOT ALLOCATED ANY POWER FROM CENTRAL SECTOR
  STATIONS AS PER THE DERC ORDER.

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• THE TRANSMISSION CHARGES APPORTIONMENT OF
  DISTRIBUTION LICENSEES WOULD BE AS UNDER

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4 STATE SECTOR TRANSMISSION CHARGES

• FOR STATE SECTOR TRANSMISSION CHARGES, BILLS
  SHALL BE ISSUED BY STU BASED ON THE ALLOCATION OF
  STATE SECTOR GENERATING CAPACITY TO THE
  DISTRIBUTION LICENSEES BASED ON THE CHARGES FIXED
  BY DERC.

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SCHEDULING EXPERIENCE
In scheduling dispatch of power there no major
hurdle except the fact that there is a mismatch
between requirement availability of NDMC and
MES due to entire requirement has been booked to
single source i.e. BTPS. When all machines of
BTPS are on bars these utilities are left with
surplus power whereas if machines are down there
is a shortage and over-drawal by both the
utilities.
41
CASE STUDY FOR NDMC
The following table indicates that the scheduling
done by SLDC in case of NDMC and MES is most
economic as mandated by the law (EA 2003 Section
32.2.(e)) which indicates The State Load
Despatch Centre shall be responsible for
carrying out real time operations for grid
control and despatch of electricity within the
State through secure and economic operation of
the State grid in accordance with the Grid
Standards and the State Grid Code.
42
CASE STUDYFOR MES
Due to single source allocation to MES the vital
utility is facing shortages due to outage of
units at BTPS which is evident from the
scheduling profile for 01-04-2007 as indicated
hereunder
This scenario has also happened in case of NDMC
when Unit No. 5 1 at BTPS were out due to the
similar constraints.
43
Disposal of Surplus Power and Availing additional
requirement to meet the peak demand.

• SLDCs role as per IEGC clause 4 of Annexure 1
  is only as a facilitator not a trader/broker
  for identifying buyer/seller for arranging
  scheduled inter-change within the region or
  across the regional boundary.
• For arriving at the Drawal Schedule of
  Distribution Licensees they are required to
  indicate the quantum of power from their share
  to be booked for sale. They are not able to
  match their individual schedule with the total
  requirement. The example is as shown in the next
  slide.

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Disposal of Surplus Power
SLDC faced difficulties in scheduling purposes
for power transfer of Delhi to UPPCL and Delhi
to TPTCL during off-peak hours. In both the deals
BRPL was the co-ordinator and has to give the
agreed aggregate requirement of the buyers i.e.
to the tune of 400 550 MW in case of UPPCL
and upto 200 MW in case of TPC. Finally SLDC has
to apply the own logic to draw out the drawal
schedules of the states as was done in case of
UPPCL deal effective from 5-4-07.
Utilities Quantum indicated at Delhi Periphery by BRPL in MW Quantum finalized by SLDC at Delhi Periphery in MW Percentage Share as finalized by SLDC
BRPL 170 137 34.25
BYPL 90 72 18.0
NDPL 115 93 23.25
NDMC 100 80 20.0
MES 22 18 4.5
TOTAL 497 (against the requirement of 400 MW) 400 100
The same percentage share has been applied to TPC
deal also.
45
Availing the additional Power to meet the peak
Demand
On behalf of Discoms DTL has committed 750 MW
off-take from MP during July to October07 the
corridor booking is required to be done by 19th
April07 for July transaction and 19th May07 for
August transaction, etc. SLDC requested all
Distribution Licensees to book the corridor as
per the individual requirement. It was also
advised in case no agreement for individual
agreement is arrived the ratio of CPSU allocation
made to Distribution Licensees be applied for
booking the corridor. The individual quantum as
per CPSU allocation are as under
Utilities Share of CPSUs Quantum to be booked as per CPSU allocation in MW
BRPL 43.58 327
BYPL 27.24 204
NDPL 29.18 219
Total 100.00 750
Note NDMC MES demand is likely to be met
from the allocation of BTPS i.e. 49.65 and
7.09 capacity allocation from BTPS
respectively.
These co-ordination activities should be done by
DPPG instead of SLDC.