Settlement systems under ABT
description
Transcript of Settlement systems under ABT
Settlement systems under ABT
WHAT IS SETTLEMENT ?• Settlement means “Entire process of
payment/ receipt/ adjustment/ reconciliation for the commodity/ services bill
for the period under consideration”
• To be FAIR and EQUITABLE• To RECOVER DUES at the EARLIEST (Billing Cycle)• TRANSPERANCY• Dispute Resolution• Reconciliation
Settlement PrinciplesAs per Regulations• What charges to be settled ? ….• Who will collect ?• Billing @ What periodicity? (Billing Cycle)• Bill date • Due Date for allowing Rebate• Due Date for Levying Surcharge • Rebate Rate• Surcharge rateAs per BPSA/ PPA/ BPTA / Regulations• Payment Security Mechanism• Arbitration • Dispute Resolution • Legal Jurisdiction
Receipts by the GeneratorA. Capacity Charge based on declared generation
availability.
B. Energy charges for the energy requisitioned/
scheduled.
C. UI charges (at low frequency operation):
If UI is positive generator will receive. AG >
SGIf UI is negative generator will pay. AG < SG
(This will be worked out for each time block)Receipts = A+B±C+incentive..
Payment by the beneficiariesA. Capacity charge in proportion to the Entitlement
(shares) of the declared availability.
B. Energy charge for the energy scheduled by the
constituent.
C. UI charges (During low frequency operation):
If UI is negative beneficiary will receive. AD < SD
If UI is positive beneficiary will pay. AD > SD
(This will be worked out for each time block )
payments=A+B±C+ proportionate incentive.
Unscheduled Interchange (UI)
• A generator generates more than the schedule, thereby increasing the frequency.
• A generator generates less than the schedule, thereby decreasing the frequency.
• A beneficiary overdraws power, thereby decreasing the frequency.
• A beneficiary underdraws power, thereby increasing the frequency.
SETTLEMENT SYSTEMTotal capacity charge payable to CGS-1 for the day
= x1 * capacity charge rate of CGS-1
Total Energy charge payable to CGS-1 for the day= x1’ * Energy charge rate of CGS-1 4
Total capacity charge payable by SEB-A for the day= a1 * capacity charge rate of CGS-1
+ a2 * -do- CGS-2
+ a3 * -do- CGS-3
Total Energy charge payable by SEB-A for the day= (a1’) * Energy charge rate of CGS-1 ( 4 )
+ (a2’) * -do- CGS-2 ( 4 )
+ (a3’) * -do- CGS-3 ( 4 )
All capacity charge and Energy charge payments to be made by SEBs directly to CGS.
SRLDC/Comml/IEGC/38
SETTLEMENT SYSTEMActual (metered) injection of CGS-1 in the time block = X1 MWh.
Excess injection = (X1 – x1’ ) MWh.
4
Amount payable to CGS-1 for this =(X1-x1’) * pool price for the block.
4
SEB-A’s scheduled drawl for time block = a1’+a2’+a3’ = a’ MW (ex-CGS Bus)
SEB-A’s NET drawal schedule = (a’ – Notional Transm. Loss) MW
= (a’ – Notional Transm. Loss) = A’ MWH
4
Actual (metered) net drawal of SEB-A during time block = A MWH
Excess drawal by SEB-A = (A-A’) MWh.
Amount payable by SEB-A for this = (A-A’) * pool price for the block.
All above payments for deviations from schedules to be routed through a pool A/C operated by RLDC
SRLDC/Comml/IEGC/39
UI - A RATIONAL AND SCIENTIFIC VECTOR
BALANCING MARKET
MERIT ORDER OPERATION
TRANSPARENCY
NEUTRALITY
SIMPLICITY
PRICE SIGNAL EASILY AVAILABLE
NO NEED TO NEGOTIATE ANY PRICE
EASY SETTLEMENT
EASY TO UNDERSTAND AND IMPLEMENT
EASE OF REGULATION
Energy Charges
Energy Charges =Rate of Energy Charges x Schedule.Generation (Ex-Bus)
Unscheduled Interchange (UI)Variation in actual Generation / Drawal and Scheduled
Generation / Drawal shall accounted for through U.I
UI for Generator = Actual Generation – Scheduled Generation
UI for Beneficiaries = Total Actual drawal – Total Scheduled Drawal
UI worked out for 15 minutes time block.
1000MW
800
600
400
200
00 6 12 18 HRS 24
Forecast ex-bus capability of power plant
SEB - A’s entitlement (40%)
Entitlement for which Capacity chargesAre payable by SEB-A
Schedule for which Energy chargesAre payable by SEB- A
Declared Capability for which Capacity chargesAre recieveable by ISGS
Gen.Sched. for which Energy chargesAre recieavable by ISGS
Schedule, Actual & UI
Unscheduled Interchange
UI vector w.e.f 03-05-10
0
100
200
300
400
500
600
700
800
900
1000
Frequency in Hz.
UI r
ate
in P
s/u
49.7Hz 403ps/u
49.5Hz 873ps/u
50.2Hz 0 ps/u
50.0Hz 155 ps/u
Rationale in fixing the rate
UI rate @50Hz= 155ps/u
Median of of Average cost of Coal/ Lignite for 08/09-01/10
UI rate @49.7Hz= 403ps/u
sufficient incentive to the generating station based on coal including imported coal
UI rate @49.5Hz=
873 ps/u
highest of the average energy charges of generating stations for 08/09-01/10
UI rates specified for 49.5-50.2
Slope 15.5 ps/ u
Slope 47.0 ps/ u
Billing and Payment of UI• UI charges inherent part of Tariff – not a
penalty
• UI charge is settled through on weekly basis
• RPC issues the account statement every Tuesday for previous 2 week period
• Due date for payment 10 days after issue of a/c
• Disbursement to receivables within 2 days thereafter
Energy transactions of UI from/to Pool
Over Gen. By ISGS-1
Under drawl by SEB-A
UI import from IR-1
Under gen. By ISGS-2
No one to one correspondence
System frequency UI
RateRegional Pool
Over drawl by SEB-BUI Export to IR-2
Operation of Pool
Separate Pool a/cs operated by RLDCs on behalf of REBs for UI, IRE and Reactive charges
Regional Pool
Payable by ISGS-2
Payable by SEB-BPayable by IR-2at its UI rate
Receivable by ISGS-1 (up to DC) Receivable by SEB-A Receivable by IR-1
at its UI rateNo one to one correspondence
No cross adjustments allowed between the constituents
Sl. No.
Charges Component Collected by Paid by Periodicity As certified in monthly REA / weekly UI/
Weekly Reactive a/c
1 Generation Capacity Ch. Generator States Monthly Ent.
Energy Ch. Generator States Monthly Requisition
Incentive Generator States Monthly Requisition
UI charges * RLDC All payable const.
Weekly Deviations
2 Reactive Ch. Drawl from 400kV Grid RLDC States Weekly Reactive a/c
Drawl on Inter-state 220kV lines
Among themselves
States Weekly Reactive a/c
3. Transmission ch.
CTU owned RTS States Monthly Wt. Avg. Ent.
State owned RTS States Monthly Wt. Avg. Ent.
4. ULDC Charges
Central RTS States Monthly Wt. Avg. Ent.
State portion RTS States Monthly Wt. Avg. Ent.
5 STOA charges
Energy Ch. Trader Buyer Monthly Schedule
ST charges Nodal RLDC Trader (Buyer)
Immediate Approval
CTU portion -RTS ch. -do- -do- -do- -do-
-IR link ch. -do- -do- -do- -do-
STU ch. -do- -do- -do- -do-
RLDC operating . Ch. -do- -do- -do- -do-
SLDC operating. Ch. -do- -do- -do- -do-
Note : All the above charges except UI charges are based only on paper calculations. Only UI charges are based on actual meter readings
OVERVIEW
• TOTAL UI TURNOVER :- 27,275 MU
• TOTAL UI AMOUNT DISBURSED:- 9,832 CR
• AVG WEEKLY TRANSACTION:- 63 MU
• AVG WEEKLY UI AMOUNT DISBURSED:- 23 CR
UI IN SR (FROM 01/01/03 TO 01/05/2011)
AP KAR KER TN PONDY
Net UI exported(-) /
Imported(+) in MUs
-4004 9069 1638 5876 -898
Net amount paid in Crores Rs. Recv.(-)/Paid(+)
-16 2787 211 2685 -312
Average rate of UI in paise/unit 4
Recv307 Paid
129 Paid
457
Paid
348
Recv.
SUMMARY OF SR UI – 435 WKS(FROM 01/JAN/03 TO 01/MAY/11)
7455MU
2607MU
2117MU
4827MU
254MU
384
-356
500
310255
420
-244
-341-373
-305-400
-300
-200
-100
0
100
200
300
400
500
600
RA
TE
(PA
ISE
/UN
IT)
OVER DRAWAL (PURCHASE) UNDER DRAWAL (SOLD)
9704MU
7769MU
635MU
1760MU
1177MU
AP KAR KER TN
3765MU
PON
3396MU
7755MU
279MU
1879MU
UI EXCHANGES AND AVG. RATES IN RESPECT OF DIFFERENT CONSTITUENTS IN SR
TRANSACTION WITH WR
TRANSACTION WITH ER
Energy Imported/ Exported
3275 MU (IMPORT BY
SR)
1307 MU (EXPORT BY
SR)
4525 MU (IMPORT BY
SR)
1047 MU (EXPORT BY
SR)
Net Saving due to UI assistance
consequent to opportunistic with
Neighboring Regions
Rs. 978 Cr. Rs. 1154 Cr.
Note: From 03.05.10, SRPC is computing the inter-regional UI of SR on NEW grid frequency.
IR EXCHANGES OF SR IN THE FORM OF UI TILL 05-DEC-2010 (414 WEEK)