1 ERCOT Wholesale Settlement Module 3. 2 BENA iq = -1 * (Σ (RI iz + LI iz + URC iz + MISD iz + MISR...
-
Upload
warren-davidson -
Category
Documents
-
view
237 -
download
0
Transcript of 1 ERCOT Wholesale Settlement Module 3. 2 BENA iq = -1 * (Σ (RI iz + LI iz + URC iz + MISD iz + MISR...
1
ERCOT Wholesale ERCOT Wholesale SettlementSettlement
Module 3Module 3
2
BENAiq= -1 * (Σ (RIiz + LIiz + URCiz+ MISDiz+ MISRiz)z +
TCRPAYBei + Σ CSCBei ) * LRSiq
Can you tell these apart?
Introduction
3
Definitions
Settlement Overview
Settlement Calculations
Topics
4
Key Definitions
5
Operating Day - Date of power flow
Settlements- Process used to resolve financial obligations;
Assess administrative and miscellaneous fees; Provide
transmission-billing determinants
Settlement Statement- A statement issued by ERCOT reflecting
a breakdown of market charges
Settlement Invoice- A notice for payment or credit due rendered
by ERCOT
Definitions
6
Initial Statement- Posted 10 days after Operating Day
Final Statement- Posted 59 days after Operating Day
True Up Statement- Posted 6 months after Operating Day
Resettlement Statement- Ad Hoc; posted as needed
Definitions
7
Charge Type- Line item on settlement statement
Settlement Interval- A period of time for which market services
are settled
Bill Determinants- Variables used to calculate a Charge Type
Definitions
8
Recorder - A sequence of alpha-numeric values to identify data
Example: NMLEIOL_H04_99_MYRESOURCEID,1
Channel - Indicates the iteration of the settlement run (Initial, Final, True-Up, Resettlement)
Definitions
9
Overview
10
Bilateral transactions
QSEs
Load Serving Entities
Resources
Electricity sellersElectricity sellers Electricity buyersElectricity buyers
QSEsBilateral
transactions
ERCOT SETTLEMENTSERCOT SETTLEMENTS
$ $
Overview
11
All cash flow defined from ERCOT perspective:
NEGATIVE amountsERCOT pays Market Participant
POSITIVE amountsMarket Participant pays ERCOT
“VISA Bill” Rule
Overview
12
Market Participants’ Roles
QSE: Daily review of Settlement Statements Download of Data Extracts Shadow Settlement and Validation Research Discrepancies Register Disputes Weekly review of Invoices Settle with ERCOT
Overview
13
Market Participants’ Roles
LSE / Resources: Download of Data Extracts Research Discrepancies Settle with QSE
Overview
14
ERCOT’s Daily Settlement Procedures:Validate Settlement Statements for publishingCreate and publish Invoices (Weekly)Facilitate Invoice Payment Processes (Weekly)Participate in UFE AnalysisDispute Research and ResolutionProvide Settlement information (ERCOT, PUCT, Market
Participants)
ERCOT's Roles
Overview
15
Questions
16
Settlement Calculations
17
ERCOT MUST REMAIN REVENUE NEUTRAL!
Settlement Calculations
18
All payments for Market Services will have a corresponding cost allocation.
Common forms of cost allocation Obligation Direct Assignment Load Allocation BENA
Charge types are grouped into payments and cost recovery for market services.
Settlement Calculations
Revenue Neutrality
19
ERCOT settles for services procured to manage the Texas power grid.
Capacity Settlement
Settlement Calculations
Settlement of What?
Energy Settlement
20
Capacity Settlement
21
Learning Objectives:Learning Objectives:
Ancillary ServicesAncillary Services
Replacement ReserveReplacement Reserve
OOMCOOMC
Capacity Settlement
22
QSE’s AS obligation quantity based on its Load Ratio Share (LRS)
QSE’s have opportunity to self-arrange their obligation
ERCOT will procure at Market Clearing Price all AS obligations not self-arranged.
Ancillary Services
Capacity Settlement
23
Ancillary Services Capacity
ERCOT
Obligation per Load Ratio Share
$
$
Emergency Short Supply
Capacity
$
Self Arrangement(reduces obligation)
Ancillary Services
Capacity Settlement
24
QSEObligation
(MW)
Self Arranged
(MW)
Amount Short (MW)
Bid Amount
(MW)Bid Price
($/MW)Procurement
(MW)1 500 250 250 100 15 02 300 300 0 100 12 503 200 0 200 400 10 400
Total 1000 550 450 600 12 450
QSEPayment
($)Allocation
($)1 0 30002 -600 03 -4800 2400
Total -5400 5400
Ancillary Service Example Calculation
Capacity Settlement
25
Procured Ancillary Service Capacity
PCASqi = -1 * (CASqi * MCPCASi )
Terms
PC : Ancillary Service Capacity Payment
C: Capacity Procured
MCPC: Market Clearing Price for CapacityProtocol 6.8.1.2
Translation: The payment for Ancillary Service Capacity is equal to the Amount of Capacity procured times the Clearing price for that Service.
Subscripts
i: Interval
q: QSE
Capacity Settlement
26
LAASqi = ASPi * NTOASqi
Protocol 6.9.1
Terms
LA: Load Allocated Ancillary Service Charge
ASP: Ancillary Service Price
NTO: Ancillary Service Net Obligation per QSE
Translation: The Load Allocation Charge for an ancillary service is equal to the Ancillary Service Price times the Net Obligation for the QSE.
Subscripts
i: Interval
q: QSE
Ancillary Service Cost Allocation
Capacity Settlement
27
Learning Objectives:Learning Objectives:
Ancillary ServicesAncillary Services
Replacement ReserveReplacement Reserve
OOMCOOMC
Capacity Settlement
28
Providers of Replacement Reserve (RPRS) are paid for three distinct types of service:
Capacity Insufficiency
Zonal Congestion
Local Congestion
Section 6.8.1.10 and 6.8.1.11
Capacity Settlement
29
Units selected for Capacity Insufficiency or Zonal Replacement are paid:
the higher of their bid or,
the highest MCPC for all Replacement Reserve procured during the procurement processes.
Section 6.8.1.10 and 6.8.1.11
Capacity Settlement
30
Units selected for Local Replacement are paid:
Resource Category Generic Startup Cost for starting
Resource Category Minimum Energy Cost minus MCPE for operating at the LSL.
Section 6.8.1.10 and 6.8.1.11
Capacity Settlement
31
Payment from the Market is collected through the following charges:
RPRS Zonal Congestion Charge
RPRS Uplift Charge
Section 6.9.2.1.1
Capacity Settlement
32
RPRS Zonal Congestion Charge
RPRS Zonal Congestion costs will be directly allocated to QSEs whose schedules have an impact on a congested Commercially Significant Constraint
Note that clearing RPRS for Zonal Congestion creates shadow prices for capacity and triggers corresponding TCR payments.
Section 7.3.4.2
Capacity Settlement
33
RPRS Uplift Charge
ERCOT nets:
The total payments for Zonal, Local and Capacity Insufficiency RPRS and
The direct assigned Congestion impact and TCR Payments
The difference is uplifted at Load Ratio Share to all QSEs.
Section 6.9.2.1.2
Capacity Settlement
34Section 6.9.2.1.2
RPRSUplift
Charge
Capacity Insufficiency
Zonal Replacement
Local Replacement
TCR Payments
Zonal Congestion
Impact
Capacity Settlement
35
UCRP = -1 * [ Σ ( PCRP + LPCRP ) + TCRPAYRP + Σ CSCRP ]* LRS
RPRS Uplift Charge
Variables
UC = RPRS Uplift ChargePC = Cost of Capacity for Zonal
Congestion and Capacity Insufficiency
LPC = Cost of RPRS for Local Congestion
US = RPRS Under Scheduled ChargeTRCRPAY = TCR Payment per HourCSC = RPRS CSC Impact Capacity
ChargeLRS = Load Ratio Share
Subscripts
RP = Replacement Reserve
Section 6.9.2.1.2
Capacity Settlement
36
Learning Objectives:Learning Objectives:
Ancillary ServicesAncillary Services
Replacement ReserveReplacement Reserve
OOMCOOMC
Capacity Settlement
37
What is OOMC?
Replacement Reserve procured out of merit order
Looks a lot like Local Replacement Reserve
ERCOT-wide cost is uplifted to QSEs (LRS)
Capacity Settlement
OOMC
38
Units selected for OOMC are paid:
Resource Category Generic Startup Cost minus energy revenue during ramp (back 12 intervals), plus
Resource Category Minimum Energy Cost minus MCPE for operating at the LSL
or
Replacement Bid, if cheaper.
Section 6.8.1.10 and 6.8.1.11
Capacity Settlement
39
Energy Settlement
40
Learning Objectives:Learning Objectives:
Balancing EnergyBalancing EnergyResource ImbalanceResource ImbalanceLoad ImbalanceLoad ImbalanceOOMEOOMEUninstructed Resource ChargeUninstructed Resource ChargeCongestionCongestionMismatched SchedulesMismatched SchedulesBENABENA
Energy Settlement
41
Represents the increase or decrease in energy
dispatched by Settlement Interval in Real Time to
ensure the balancing needs of ERCOT.
The energy is supplied by ERCOT through
acquisition of resources (generating units and
interruptible demands) to meet load variations not
covered by Regulation Service.
Energy Settlement
Balancing Energy
42
Zonal Instructed Deviation (up/down) from ERCOT to
QSE Used to solve power balance and/or congestion Settled at zonal MCPE
How is this paid?
Balancing Energy
Energy Settlement
43
Learning Objectives:Learning Objectives:
Balancing EnergyBalancing EnergyResource ImbalanceResource ImbalanceLoad ImbalanceLoad ImbalanceOOMEOOMEUninstructed Resource ChargeUninstructed Resource ChargeCongestionCongestionMismatched SchedulesMismatched SchedulesBENABENA
Energy Settlement
44
Scheduled Generation - Metered Generation
Paid/charged at MCPE
Why an imbalance?
Instructed Deviations
Uninstructed Deviations (may be subject to URC)
Do all Resource Imbalances result in payments to the QSE?
Resource Imbalance
Protocol 6.8.1.13
Energy Settlement
45
Situation:Situation: SQSE has scheduled to generate at 208 MW from their SQSE has scheduled to generate at 208 MW from their resource in the South Zone for IE 1630.resource in the South Zone for IE 1630.
The Resource actually generates at 220MW.The Market Clearing Price for Energy, South CM Zone is $17.09/MWh
Conditions:Conditions:
SQSESQSE
Resource Imbalance Example
Energy Settlement
46
Scheduled Generation
Actual Generation
0
220MW
Resource Imbalance Example
Energy Settlement
208MW
55MWh 52MWh
SQSESQSE
47
For a given interval and zone,
RI = (Scheduled Generation – Actual Generation) * MCPE
Therefore, for interval 1630, SQSE’s Resource Imbalance in the South Zone is
RI = (52MWh - 55MWh) * $17.09/MWh = - $51.57
Resource Imbalance Example
Energy Settlement
SQSESQSE
48
RIizq = (QRSizq - MRizq) * MCPEiz
Resource Imbalance
Protocol 6.8.1.13
Terms
RI : Resource Imbalance Amount
QRS: Scheduled Resource
MR: Metered Resource
MCPE: Market Clearing Price for Energy
Translation: Resource Imbalance is the difference between the Scheduled and Actual Resource output times the Clearing Price for Energy.
Subscripts
i: Interval
z: Zone
q: QSE
Energy Settlement
49
Learning Objectives:Learning Objectives:
Balancing EnergyBalancing EnergyResource ImbalanceResource ImbalanceLoad ImbalanceLoad ImbalanceOOMEOOMEUninstructed Resource ChargeUninstructed Resource ChargeCongestionCongestionMismatched SchedulesMismatched SchedulesBENABENA
Energy Settlement
50
Scheduled Load - Adjusted Metered Load
Paid/charged at MCPE
Why an Imbalance?UFEForecast InaccuraciesRelaxed Balanced Schedule (section 4.3.1)LaaR’s
Load Imbalance
Protocol 6.9.5.2
Energy Settlement
51
Situation:Situation: SQSE schedules 140 MW (35 MWh / interval) of Load in SQSE schedules 140 MW (35 MWh / interval) of Load in the South Zone for IE 1630the South Zone for IE 1630
Adjusted Metered Load = 160 MW (40 MWh / interval) in the South Zone.Market Clearing Price for Energy = $17.09/MWh in the South
Conditions:Conditions:
SQSESQSE
Load Imbalance Example
Energy Settlement
52
Actual Load
Scheduled Load
0
140
160
South Zone
Load Imbalance Example
Energy Settlement
35MWh 40MWh
SQSESQSE
53
For a given interval and zone,
LI = -1*(Scheduled Load – Actual Load) * MCPE
Therefore, for interval 1630, SQSE’s Load Imbalance in the South Zone is
LI = -1*(35MWh - 40MWh) * $17.09/MWh = $85.45
SQSESQSE
Load Imbalance Example
Energy Settlement
54
Actual Load
Scheduled Load
0
200
208
SQSESQSE
North Zone
Load Imbalance Example
Energy Settlement
52MWh 50MWh
55
For a given interval and zone,
LI = -1*(Scheduled Load – Actual Load) * MCPE
Therefore, for interval 1630, SQSE’s Load Imbalance in the North Zone is
LI = -1*(52MWh - 50MWh) * $17.09/MWh = -$34.18
SQSESQSE
Load Imbalance Example
Energy Settlement
56
LIizq = -1 * (SLizq - AMLizq) * MCPEiz
Load Imbalance
Protocol 6.9.5.2
Translation: Load Imbalance is the difference between the Scheduled and Actual Load times the Clearing Price for Energy.
Terms
LI : Load Imbalance Amount
SL: Scheduled Load
AML: Adjusted Metered Load
MCPE: Market Clearing Price for Energy
Subscripts
i: Interval
z: Zone
q: QSE
Energy Settlement
57
Learning Objectives:Learning Objectives:
Balancing EnergyBalancing EnergyResource ImbalanceResource ImbalanceLoad ImbalanceLoad ImbalanceOOMEOOMEUninstructed Resource ChargeUninstructed Resource ChargeCongestionCongestionMismatched SchedulesMismatched SchedulesBENABENA
Energy Settlement
58
What is OOME?
Out of merit order, unit-specific energy deployment
Procured by ERCOT when no market solution
Paid according to a generic cost structure (Protocol Section 6.8.1.1)
ERCOT-wide cost is uplifted to QSEs based on Load-Ratio-Share (LRS)
Energy Settlement
OOME
59
The OOME Up and OOME Down payments are intended to cover only the amount above the billable quantity times MCPE. MCPE times billable quantity is paid in Resource Imbalance.
If the calculated OOM Up payment is insufficient --- additional verifiable costs may be paid if submitted in a timely manner.
OOME Payment Methodology
Energy Settlement
OOME
60
Situation:Situation: SQSE receives an OOME instruction for IE SQSE receives an OOME instruction for IE 1600 to move the output of Unit 1 to 150 MW1600 to move the output of Unit 1 to 150 MW
SQSESQSE
Data for SQSE for IE 1600:
RP_Unit1 = 100 MW (25 MWh per 15 minute interval)
Metered Generation by Unit1 = 36 MWh
Instructed Output Level= 150MW (37.5 MWh per interval)
Unit 1 is a Gas-Steam Reheat Boiler unitGeneric Cost (Per Protocol 6.8.2.1) = $61.41 per MWh
MCPE = $15.80 per MWh
Energy Settlement
OOME Example
61SQSESQSE
Instructed Output
0
144
150
Metered Output
Resource Plan andGeneration Schedule100
OOME Example
Energy Settlement
37.5MWh 36MWh 25MWh
62
OOME Example
Energy Settlement
As with all settlement equations,
OOME Payment = -1 * Quantity * Price
Price is fairly easy:
Price = (Generic Cost – MCPE) or 0, whichever is greater.
In this example, Price = $61.41- 15.80 = $45.61 per MWh
Why do we subtract the MCPE from the Generic Cost?
SQSESQSE
63
OOME Example
Energy Settlement
Quantity is a little more difficult:
Quantity = The change in energy output in response to the instruction with a maximum of the instruction itself.
SQSESQSE
64
OOME Example
Energy Settlement
The unit’s response = Metered Output – Resource Plan= 36 MWh – 25 MWh= 11 MWh
The unit’s instruction = Instructed Output – Resource Plan= 37.5 MWh – 25 MWh= 12.5 MWh
Since the response does not exceed the instruction, ERCOT will pay SQSE for the unit’s response of 11 MWh.
SQSESQSE
65
OOME Example
Energy Settlement
Putting it all together,
OOME Payment = -1 * Quantity * Price
= -1 * 11 MWh * $45.61/MWh
= -$501.71
SQSESQSE
66
PEOOMUPiuq = -1 * EOOMUPiuq * Max [(RCGFCc – MCPEiz),0]
Terms
PE: Price paid for OOM Energy
E: Amount of OOME Energy Provided
RCGFC: Resource Category Generic Fuel Cost
MCPE: Market Clearing Price for Energy
Translation: The OOM Energy premium payment is equal to the Energy provided times the difference between MCPE and the Generic cost for the OOME service.
Protocol 6.8.2.3
Subscripts
i: Interval
z: Zone
q: QSE
c: resource category
u: generation unit
Energy Settlement
OOME
67
where EOOMUPiuq = Max (0, Min ((MRiuq – OLiuq), IOOMUPiuq))
Terms:
MR = Metered Resource
OL = Resource Plan Output Level
I = OOME Instruction
PEOOMUPiuq = -1 * EOOMUPiuq * [Max (RCGFCc – MCPEiz),0]
Subscripts
i: Interval
z: Zone
q: QSE
c: resource category
u: generation unit
Energy Settlement
OOME
Protocol 6.8.2.3
68
Learning Objectives:Learning Objectives:
Balancing EnergyBalancing EnergyResource ImbalanceResource ImbalanceLoad ImbalanceLoad ImbalanceOOMEOOMEUninstructed Resource ChargeUninstructed Resource ChargeCongestionCongestionMismatched SchedulesMismatched SchedulesBENABENA
Energy Settlement
69
Uninstructed Resource Charge (URC)
A QSE who schedules resources will be paid the full
Market Clearing Price for Energy Up to the amount of
instructed deviations
An Uninstructed Deviation Charge Back will be
calculated at a factor of the MCPE. The Uninstructed
Deviation Charge Back will be applied to each
Congestion Zone in which a QSE has a deviation from
schedule plus instructions.
Uninstructed Resource Charge
70
Integrated Amount of
ERCOT Regulation is less than -25
MWhrs
Uninstructed Resource
Charge
Over Generation in a zone where
MCPE is positive
Metered Resource is greater than larger of 101.5% of (or 5MWh over) total schedule
plus Instruction
Uncontrollable Renewable Resource has generated
more than 150% of its Schedule
Price Chasing
Uninstructed Resource Charge
71
Integrated Amount of
ERCOT Regulation is
greater than 25 MWhrs
Uninstructed Resource
Charge
Under Generation in a zone where
MCPE is negative
Metered Resource is less than lesser of 98.5% of (or
5MWh under) total schedule plus Instruction
Uncontrollable Renewable Resource generates less than 50% of Schedule.
Cost Optimization
Uninstructed Resource Charge
72
Learning Objectives:Learning Objectives:
Balancing EnergyBalancing EnergyResource ImbalanceResource ImbalanceLoad ImbalanceLoad ImbalanceOOMEOOMEUninstructed Resource ChargeUninstructed Resource ChargeCongestionCongestionMismatched SchedulesMismatched SchedulesBENABENA
Energy Settlement
73
Settlement of Zonal Congestion
QSE impact is determined by the bilateral schedule
The net Resource schedule (Resource – Obligation) for each zone is multiplied by the zonal shift factor for each Commercially Significant Constraint (CSC).
The CSC impacts are added together
The QSE is charged the Impact on the CSC multiplied by the Shadow Price on the CSC.
Congestion Management - Zonal
74
Congestion Management - Example
Congestion Management - Zonal
SouthZone
NorthZone
South to North CSC
West to North CSC
South to West CSC
WestZone
75
Shift Factors
CM Zone names
Average Weighted Shift Factor
West to North
Average Weighted Shift Factor
South to North
Average Weighted Shift Factor
South to West
West2004 0.489911548 -0.004425342 -0.016725781
North2004 -0.008056712 -0.120276952 -0.003225342
South2004 0.002302236 0.503257831 0.104328870
CSC Zonal Average Weighted Shift Factors
Congestion Management - Zonal
76
https:tcr.ercot.com
Congestion Management - Zonal
Where do you find the real shift factors?
77
Situation:Situation: SQSE schedules 548 MW of Resource from the South SQSE schedules 548 MW of Resource from the South Zone and delivers 140 MW to the South Zone and 408 MW to the Zone and delivers 140 MW to the South Zone and 408 MW to the North Zone.North Zone.
The South to North congestion Path is constrained.
MCPE_North = $28.84MCPE_South = $17.09MCPESPC_SN = $32.91
Congestion Management - Zonal
SQSESQSE
Congestion Management - Example
78
Congestion Management - Example
Congestion Management - Zonal
South
West North
Res = 548MW
Load = 140MW
Res = 0MW
Load = 408MW
SQSESQSE
79
SQSE’s South Zone Schedule impacts the South to North constraint as follows:
Impact = (Resource – Obligation)(1/4 hr) * SFSN
= (548 MW – 140MW)(1/4 hr) * 0.503257831= 51.33 MWh
SQSESQSE
Congestion Management - Example
SQSE’s North Zone Schedule impacts the South to North constraint as follows:
Impact = (Resource – Obligation)(1/4 hr) * SFSN
= (0 MW – 408MW)(1/4 hr) * -0.120276952= 12.27 MWh
Congestion Management - Zonal
80
Now the Congestion Charge for a particular CSC is simply a quantity times a price:
Congestion Charge = (Sum of Impacts) * Shadow Price= (51.33 MWh + 12.27 MWh)($32.91/MWh)= $2093.08
SQSESQSE
Congestion Management - Example
Congestion Management - Zonal
81
ICSCiq = Σ((QSSiqz – SOiqz) * SFZCSC)z
Protocol 7.3.4.1
CSC Schedule Impact
Terms
I: Scheduled MW Impact per CSC
QSS: QSE Supply Schedule
SO: Scheduled Obligation
SF: Shift Factor
Subscripts
i: Interval
q: QSE
z: zone
CSC: Commercially Significant Constraint
Congestion Management - Zonal
82
CSCBECSCiq = SPCCSCi * MAX(0, ICSCiq)
Congestion: CSC Impact
What happens if my impact is negative?
Terms
I: Scheduled MW Impact per CSC
CSCBE: Energy Related Congestion Charge
SPC: Shadow Price
Subscripts
i: Interval
q: QSE
CSC: Commercially Significant Constraint
Congestion Management - Zonal
Protocol 7.3.4.1
83
CSCBECSCiq = SPCCSCi * ICSCiq
Congestion: CSC Counterflow
Terms
I: Scheduled MW Impact per CSC
CSCBE: Energy Related Congestion Charge
SPC: Shadow Price
Subscripts
i: Interval
q: QSE
CSC: Commercially Significant Constraint
Congestion Management - Zonal
Protocol 7.3.4.1
84
Situation:Situation: If SQSE had bid for and purchased 100 TCRs for If SQSE had bid for and purchased 100 TCRs for this month at $3 a piece, then the impact is as follows:this month at $3 a piece, then the impact is as follows:
SQSESQSE
Cost of TCRs = 100 * $3 = $300 (covers entire month)
Cost of congestion from IE 1630 = $2,093.08
Payment from TCR = TCR/4 * MCPESPC_SN
= (100/4) * $32.91 = $822.75
SQSE cost for Congestion = $2,093.08 – $822.75 = $1270.33(minus the monthly amortized cost of the TCR)
Congestion Management – TCR Example
Congestion Management - Zonal
85
Limit = 500 MW
200 MW
300 MW
100 MW OVERLOAD
“Generate at 200”
200 MW
Question: How does ERCOT select the unit?
Congestion Management - Local
86
In real time, ERCOT manages Local Congestion using unit specific deployments.
Units selected are paid by their Bid Premiums if a Market Solution is used.
Units selected are paid as OOM if no Market Solution exists.
Charge uplifted to QSEs on a Load Ratio Share Basis.
Congestion Management - Local
Congestion Management – Unit Selection
87
Learning Objectives:Learning Objectives:
Balancing EnergyBalancing EnergyResource ImbalanceResource ImbalanceLoad ImbalanceLoad ImbalanceOOMEOOMEUninstructed Resource ChargeUninstructed Resource ChargeCongestionCongestionMismatched SchedulesMismatched SchedulesBENABENA
Energy Settlement
88
QSE A
R O
QSE A 100MW (South)
100MW QSE B (South)
QSE B
R O
QSE A 120MW (South)
120MW QSE B (South)
Mismatch
Mismatched Schedules
Energy Settlement
What happens if the following schedule is not resolved?
89
QSE A
R O
QSE A 100MW (South)
100MW QSE B (South)
QSE B
R O
QSE A 120MW (South)
120MW QSE B (South)
Mismatch
Energy Settlement
QSE A 100MW (South)
ERCOT 20MW (South)
Resolved in Settlement
Mismatched Schedules
90
Translation: The mismatch payment or charge is equal to the mismatch amount delivered to or received from ERCOT times the MCPE.
Terms:
MISD: Payment for mismatched amount delivered to ERCOT
MISR: Charge for mismatched amount received from ERCOT
MISAMTD: Mismatched amount delivered to ERCOT
MISAMTR: Mismatched amount received from ERCOT
MCPE: Market Clearing Price for Energy
Energy Settlement
MISDiqz = -1 * MISAMTDiqz * MCPEiz
MISRiqz = MISAMTRiqz * MCPEiz
Subscripts
i: Interval
z: Zone
q: QSE
Mismatched Schedules
91
Learning Objectives:Learning Objectives:
Balancing EnergyBalancing EnergyResource ImbalanceResource ImbalanceLoad ImbalanceLoad ImbalanceOOMEOOMEUninstructed Resource ChargeUninstructed Resource ChargeCongestionCongestionMismatched SchedulesMismatched SchedulesBENABENA
Energy Settlement
92
BENA
ResourceImbalance
Load Imbalance
Mismatch Energy
Delivered
TCR Payments
$ $
$
$Uninstructed
Resource Charge
$
Mismatch Energy
Received$
Balancing Energy CSC
Charges
$
Balancing Energy Neutrality Adjustment
Energy Settlement
93
BENAiq= -1 * (Σ (RIiz + LIiz + URCiz+ MISDiz+ MISRiz)z +
TCRPAYBei + Σ CSCBei ) * LRSiq
Terms
BENA: Balancing Energy Neutrality Adjustment
RI: Resource Imbalance
LI: Load Imbalance
URC: Uninstructed Resource Charge
MISD: Mismatched Energy Delivered
MISR: Mismatched Energy Received
TCRPAY: Transmission Congestion Right Payments
CSC: Direct Assigned Congestion Cost
LRS: Load Ratio Share Protocol 9.6.1
Energy Settlement
Balancing Energy Neutrality Adjustment
94
BENAiq= -1 * (Σ (RIiz + LIiz + URCiz+ MISDiz+ MISRiz)z +
TCRPAYBei + Σ CSCBei ) * LRSiq
Translation: The Balancing Energy Neutrality Adjustment is equal to the Sum of the Load Imbalances, Resource Imbalances, Uninstructed Resource Charges, Mismatch Charges, TCR Payments and Direct Assigned Congestion costs allocated at Load Ratio Share.
Energy Settlement
Balancing Energy Neutrality Adjustment
Protocol 9.6.1
95
Questions