Configuration Guide for: Internal - CG CC 6774 Real Time Congestion OffsetReal Time Congestion Offset / Date: 01/31/11
Settlements and Billing
BPM Configuration Guide: Real Time Congestion Offset
CC 6774
Version 5.32
CAISO, 2018 / Page 1 of 24Settlements and Billing / Version: 5.32
Configuration Guide for: 6774 Real Time Congestion Offset / Date: 01/31/1111/13/14
Table of Contents
1.Purpose of Document
2.Introduction
2.1Background
2.2Description
3.Charge Code Requirements
3.1Business Rules
3.2Predecessor Charge Codes
3.3Successor Charge Codes
3.4Inputs – External Systems
3.5Inputs - Predecessor Charge Codes or Pre-calculations
3.6CAISO Formula
3.7Outputs
4.Charge Code Effective Date
1.Purpose of Document
The purpose of this document is to capture the requirements and design specification for a SaMC Charge Code in one document.
2.Introduction
2.1Background
If the CAISO calculates Related to Section 11.5.4.2 of the CAISO Tariff, in allocating the non-zero amounts from of the sum of IIE, UIE, and UFE, the CAISO will first compute the Real-Time Congestion Offset (CC 6774) and allocate it to all Scheduling Coordinators based on Measured Demand, excluding demand associated with ETC or /TOR/CVR Self-Schedules for which IFM and RTM Congestion Credits wasere provided and excluding demand associated with ETC, or TOR Self-Schedules for which IFM Congestion Credits was provided.
CAISO will then compute the Real-Time Marginal Cost of Losses Offset and allocate it to all Scheduling Coordinators based on Measured Demand, excluding Demand associated with TOR Self-Schedules for which IFM and RTM Marginal Cost of Losses Credit for Eligible TOR Self-Schedules were provided.
To the extent that the sum of the Settlement Amounts for IIE, UIE, and UFE, less the HASP and RT Energy Congestion revenues computed within Real-Time Congestion Offset (from CC 6774) less the Real-Time Marginal Cost of Losses Offset does not equal zero, the CAISO will assess Charges or make Payments in Real Time Imbalance Energy Offset (CC 6477) for the resulting differences to all Scheduling Coordinators based on a pro rata share of their Measured Demand excluding demand quantity for the valid and balanced portion of TOR contract self-schedules in Real-Time and Net Measured Demand of Load Following MSSs.
For the three allocations above, Measured Demand allocation basis for MSS as specified in the Tariff11.5.4.2 shall be applied.
Neutrality is achieved in the three offset accounts for the non-zero sum of IIE, UIE, UFE and HASP and RT A/S Congestion revenues while factoring in the congestion credits and loss credits/charges.
CC6774 will provide neutrality for the congestion portion, while CC6477 will provide neutrality for the remaining balance, through a two bucket allocation approach as described above. CC6774 covers the HASP and RT Ancillary Service/S and Energy Congestion revenues and factoring in the congestion credits to ETC/TOR holders. CC6477 will cover the sum of IIE, UIE, and UFE less the HASP and RTM Energy Congestion revenues and factoring in the loss credits and charges to TOR holders.
The Real-Time Congestion Offset amounts to be allocated will come from the congestion revenues from FMMHASP Energy computed in CC 6051460, from DA Virtual Awards liquidated in HASP or RTFMM as computed in CC 6053 and CC 6473, from Real-Time Energy as computed within CC 6774, and from AS Imports as computed in CC 6711, 6721, 6715, 6725, 6755, and 6765, minus the RTM Congestion Credits computed in CC 6788..
RTM Congestion Credits to ETC/TOR Holders (CC 6788) would appear as a reduction to the Congestion revenues in CC 6774 (RT Congestion Offset).
2.2Description
This Charge Code implements the first step of neutrality for IIE, UIE and UFE as provided for in CAISO MRTU Tariff Section 11.5.4.2. In particular, this Charge Code allocates the HASP and RTM Energy and AS Congestion revenues net the RTM Congestion Credit settlement amount to Scheduling Coordinators based on their Measured Demand excluding ETC/TOR/CVR Self-Schedules for which IFM and RTM Congestion Credits were provided.
For every Trading Hour, the Real-Time Congestion Offset Amount is computed as the sum of:
(a)the Congestion revenues from FMMHASP (from CC 6051460) and Real Time Energy (calculated within CC 6774) including any Operational Adjustments, with the revenue computed based on the Day-Ahead Schedule deviation of metered quantities plus UFE multiplied by the applicablerelevant MCC at each relevant pricing node or aggregation using relevant price and quantity granularities.
(b)the Congestion revenues from AS Imports in the HASP (CC 6711, 6721) and in Real-Time Market (CC 6715, 6725, 6755, 6765)
(c)the CAISOSettlementIntervalTotalRTMCongestionCreditSettlementAmount from CC 6788, and
(d)the virtual award HASP and RTM congestion revenues from CC 6053 and CC 6473. respectively
This offset amount is allocated to Measured Demand excluding the valid and balanced ETC/TOR schedules for which Real-Time Market Congestion Credits were provided and to ETC/TOR /CVR schedules for which IFM Congestion Credits were provided. In addition, for Scheduling Coordinators of MSS operators that have elected to Load Follow or net Settlement, or both, the offset amount is allocated based on the MSS Aggregation Net Non-ETC/TOR Measured Demand.Measured Demand allocation basis for MSS as specified in the Tariff 11.5.4.2 shall be applied.
The SCs that scheduled ETC/TOR /CVR shall have their Measured Demand reduced by the valid and balanced schedule quantities for which IFM and RTM Congestion Credits were provided prior to being allocated the Real-Time Congestion Offset. This holds true even if the congestion credits were credited to the contract designated BillingSC, which maybe different from the aforementioned SCs.
Congestion Credits for CVRs are only applicable through the Transition Period (through 2010).
3.Charge Code Requirements
3.1Business Rules
Bus Req ID / Business Rule1.0 / This Charge Code allocates per hour, the Real Time Congestion Offset Amount to Scheduling Coordinators based on their Measured Demand excluding valid and balanced ETC/TOR/CVR Self-Schedules (SS) for which IFM and RTM Congestion Credits were provided.
1.1 / This Charge Code shall be calculated daily on an hourly basis.
1.2 / The allocation amount to each SC is the product of the RTCongestionOffsetRate and their Measured Demand less the Demand quantity associated with the recognized valid and balanced ETC/TOR/CVR SS for which IFM and RTM Congestion Credits were provided to the designated Billing SC.
1.3 / The valid and balanced ETC/TOR/CVR Self-Schedules per contract shall be deducted from the Measured Demand of the SC who scheduled contract self-schedules.
1.4 / For an MSS, regardless of gross or net settlement election, the Measured Demand basis shall be the MSS Aggregation Net Non-ETC/TOR/CVR Measured Demand. Calculation is done at each MSS bubble on the net metered load excluding valid and balanced ETC/TOR/CVR Self-Schedules (SS) for which IFM and RTM Congestion Credits were provided. The calculated value is then summed across all MSS bubbles for the MSS Aggregator. To this value, the exports quantity excluding valid and balanced ETC/TOR/CVR at those exports where applicable is added to come up with the Measured Demand basis.
(Fact)
1.5 / This allocation can be a payment or a charge.
2.0 / For every Trading Hour, the Real Time Congestion Offset Amount is the sum of:
a) CAISOSettlementIntervalTotalRTMCongestionCreditSettlementAmt hi(from CC 6788) summed over the hour,
b) Hourly HASP AS Imports congestion revenues from Spin and NonSpin (from CC 6711, and CC 6721)
cb) All hourly Real Time AS Imports congestion revenues from all Ancillary Services (CC6715, 6725, 6755, 6765)
cd) The Energy Congestion revenues from FMM HASP (6051BDCC 6460) and Real Time Energy (6774BD774) including any Operational Adjustments, with the revenue computed based on the Day-Ahead Schedule deviation of (metered quantities plus UFE) multiplied by the relevant MCC at each relevant pricing node or aggregation,
e) the CAISO total net congestion revenues from Virtual Awards assessed at HASP MCC in CC 6053, and
df) the CAISO total net congestion revenues from Virtual Awards assessed at RT MCC in CC 6473.
2.0.1 / The total congestion revenue from Real-Time Energy per Settlement Interval is the sum of congestion revenues from all resources, where congestion revenue are computed as follows:
(a)for Generators, the product of 1) the sum of (ai) Settlement Interval Total RTIIE 1, (b) Settlement Interval Residual Imbalance Energy, (c) Settlement Interval Exceptional Dispatch Energy excluding Voltage Support and Black Start, (d) Settlement Interval MSS Load Following Energy, and (e) Settlement Interval Uninstructed Imbalance Energy,Imbalance Energy less Standard Ramping Energy and (2)ii) Settlement Interval ResourceReal Time MCC;
(b)for Nodal Loads, the product of (i) SettlementInterval RT Imbalance Energy and (ii) SettlementIntervalResourceRealTimeMCC;
(c)for LAP Loads, the sum of (i) Real-Time Congestion Revenue From Lap Load Amount and (ii) Real-Time Congestion Revenue Neutrality Load Amount.
(d)the Real-Time Congestion Revenue From Lap Load Amount is the product of (i) Settlement Interval RT Imbalance Energy and (ii) Hourly RTM LAP SettlementIntervalLAPResourceRealTimeMCC Price;
(e)the Real-Time Congestion Revenue Neutrality Load Amount is the product of: (i) Day Ahead Load Schedule, and
(ii) the summed product of (1) Hourly Real Time Lap MCC normalized to the member PNodes based on metered demand, and (2) the change in Day Ahead Load Distribution Factors and Real Time Load Distribution Factor;
(f)for System Resources and Tie Generators:
(1) for Non-dynamic System Resources, the product of 1) the sum of (a) Settlement Interval Total IIE 1, (b) Settlement Interval Residual Imbalance Energy, (c) Settlement Interval Exceptional Dispatch Energy excluding Voltage Support and Black Start, (d) Settlement Interval Operational Adjustment Energy, and 2) Settlement Interval Real Time MCC(i) Operational Adjustment not covered in the HASP (SettlementIntervalOAfromDAorRTEnergy) and (ii) SettlementIntervalResourceRealTimeMCC ;
(2) for Dynamic System Resources, the product of 1) the sum of (a) Settlement Interval Total IIE 1, (b) Settlement Interval Residual Imbalance Energy, (c) Settlement Interval Exceptional Dispatch Energy excluding Voltage Support and Black Start, and (e) Settlement Interval Uninstructed Imbalance Energy, and 2) Settlement Interval Real Time MCCof (i) Settlement Interval RT Imbalance Energy less Standard Ramping Energy and (ii) SettlementIntervalResourceRealTimeMCC;
(g)for UFE adjustments, the product of (i) the UFE quantity per UDC (obtained as the sum of all UFE quantities of BAs for that UDC) and (ii) the Hourly Settlement Interval UFE UDC MCC (computed in Real Tijme Price Pre-Calculation); and
(h)for MSS Operators that have elected net Settlement the sum (i) the product of 1) the sum of (a) Settlement Interval Total IIE 1, (b) Settlement Interval Residual Imbalance Energy, (c) Settlement Interval Exceptional Dispatch Energy excluding Voltage Support and Black Start, (d) Settlement Interval MSS Load Following Energy, and (e) Settlement Interval Uninstructed Imbalance Energy, and 2) Settlement Interval Real Time MSS MCC, the product of (i) Settlement Interval RT Imbalance Energy less Standard Ramping Energy and (ii) the product of Settlement Interval Exceptional Dispatch Energy excluding Voltage Support and Black Start and Settlement Interval ResourceReal TimeM SSMCC.
(i)(h)
2.0.2 / Settlement Interval RT Imbalance Energy is defined for each Resource Location as the difference between its metered quantity and its Day-Ahead Schedule.
2.0.32 / Each resource is mapped to the appropriate Price Node or Aggregated Pricing Node location.
2.1 / The RTCongestionOffset rate is the quotient of: (1) the Real Time Congestion Offset Amount, and (2) the CAISO Measured Demand excluding balanced ETC/TOR Self-Schedules for which IFM and RTM Congestion Credits were provided.
3.0 / PTB Charge Allocation adjustment is not allowed for this charge code.
4.0 / The net imbalance amount calculated as the sum of (1) total amounts for charge codes 6711, 6721, 6715, 6725, 6755, 6765, (2) the RTM Congestion Credit settlement amount in CC 6788 (3) CAISOHourlyTotalHASPEnergyCongestionAmt h from CC 6051, (4) the congestion revenues from Virtual Awards computed in CC 6053 and CC 6473; minus (5) the RT Congestion Offset amount in CC 6774, in a given Trading hour, is attributed to rounding and must be output to CC 4989 Rounding Adjustment Allocation.
3.2Predecessor Charge Codes
Charge Code/ Pre-calc NameMeasured Demand over Control Area Pre-calculation
Real Time Energy Quantity Pre-calculation
Real Time Price Pre-calculation
CC 6711 - HASP Congestion - AS Spinning Reserve Import Settlement
CC 6721 - HASP Congestion - AS Non-Spinning Reserve Import Settlement
CC 6715 – Real Time Congestion – AS Spinning Reserve Import Settlement
CC 6725 – Real Time Congestion – AS Non-Spinning Reserve Import Settlement
CC 6755 – Real Time Congestion – AS Regulation Up Import Settlement
CC 6765 – Real Time Congestion – AS Regulation Down Import Settlement
CC 6788 – Real Time Market Congestion Credit Settlement
CC 6051 - HASP Energy, Congestion, and Loss Predispatched Settlement
CC 6474 – Real Time Unaccounted for Energy Settlement
CC 6475 – Real Time Uninstructed Imbalance Energy Settlement
MSS Netting Precalc
CC 6053 – Convergence Bidding HASP Energy, Congestion, Loss Settlement
CC 6473 – Convergence Bidding Real-Time Energy, Congestion, Loss Settlement
CC 6460 – FMM Instructed Imbalance Energy Settlement
3.3Successor Charge Codes
Charge Code/ Pre-calc NameCC 6477 – Real Time Imbalance Energy Offset
3.4Inputs– External Systems
Row # / Variable Name / Description1 / HourlyPredispatchFlag Brth / A flag associated with a resource, the value is 1 (“True”) when the resource is predispatchable in the HASP; otherwise, the value is 0 (“False”) or is Null or the BD is not created.
21 / DALoadSchedule BrtuT’I’M’AA’R’pW’F’S’vVL’mdh / DA Load Schedule is the energy scheduled in Day-Ahead Market to be consumed by End-Use Customer. (Load Schedule quantity is a negative value).DA Load Schedule associated with Business Associate B for for Non-Participating Load Resource r, Resource type t, and Trading Hour h as provided by IFM where Entity Type T’, UDC Index u, MSS Gross/Net Energy Settlement Type I’, and MSS Subgroup M’, APN ID A, APN Type A’, Penalty Resource ID R’, Price Node p, MSS Emissions Pay Flag W’, Entity Component F’, Entity Component Subtype S’, RUC Participation Flag V, and Load Following Flag L’ are mapped to the Master File.
This is assumed to be negative in the formulas.
3.5Inputs - Predecessor Charge Codes or Pre-calculations
Row # / Variable Name / Predecessor Charge Code/ Pre-calc Configuration1 / BAHourlyMeasuredDemandMinusBalancedRightsQuantity_EX_RTM_CONGOFF Bmdh / Measured Demand over Control Area Pre-calculation
Note: This is assumed negative in the current charge code.
2 / CAISOHourlyMeasuredDemandMinusBalancedRightsQuantity_EX_RTM_CONGOFF mdhmdh / Measured Demand over Control Area Pre-calculation
Note: This is assumed negative in the current charge code.
3 / CAISOSettlementIntervalTotalRTMCongestionCreditSettlementAmount mdhcifhi / CC 6788 – RTM Congestion Credit Settlement
4 / CAISOHourlyTotalRTCongestionSpinAmount mdhh / CC 6715 – Real Time Congestion – AS Spinning Reserve Import Settlement
5 / CAISOHourlyTotalRTCongestionNonSpinAmount mdhh / CC 6725 – Real Time Congestion – AS Non-Spinning Reserve Import Settlement
6 / CAISOHourlyTotalRTCongestionRegUpAmount mdhh / CC 6755 – Real Time Congestion – AS Regulation Up Import Settlement
7 / CAISOHourlyTotalRTCongestionRegDownAmount mdhh / CC 6765 – Real Time Congestion – AS Regulation Down Import Settlement
8 / CAISOTotalHASPSpinCongestionAmount h / CC 6711 - HASP Congestion - AS Spinning Reserve Import Settlement
9 / CAISOTotalHASPNonSpinCongestionAmount h / CC 6721 - HASP Congestion - AS Non-Spinning Reserve Import Settlement
10 / HourlyHASPEnergyCongestionAmt Brth / CC 6051 - HASP Energy, Congestion, and Loss Predispatched Settlement
118 / SettlementIntervalOAEnergy BrtuT’I’M’F’S’mdhcifSettlementIntervalOAfromDAorRTEnergy BrtuT’I’M’F’S’hi / Real-Time Energy Quantity Pre-calculation
12 / SettlementIntervalRealTimeImbalanceEnergy BrtuT’I’M’F’S’hi / Real-Time Energy Quantity Pre-calculation
13 / SettlementIntervalStandardRampingEnergy BrtuT’I’M’F’S’hi / Real-Time Energy Quantity Pre-calculation
149 / HourlyUFEUDCMCC umdhSettlementIntervalUFEUDCMCC u / Real-Time Price Pre-calculation
1510 / SettlementIntervalRealTimeMCC BrtuM’mdhcifSettlementIntervalResourceRealTimeMCC BrtuM’hi / Real-Time Price Pre-calculation
1611 / HourlyRTMLAPMCCPrice AA’mdhSettlementIntervalRealTimeLAPMCC uM’AA’hi / Real-Time Price Pre-calculation
1712 / SettlementIntervalRealTimeMSSMCCu’M’mdhcifuM’AA’hi / Real-Time Price Pre-calculation
1813 / SettlementIntervalRealTimePNodeMCC u’M’pmdhcif uM’phi / Real Time Price Pre-calculation
1914 / UDCSettlementIntervalUFEQuantity uT’I’M’mdhcif Business_Associate_UFE_Quantity BuM’mdhi / CC 6474 – Real-Time Unaccounted for Energy Settlement
20 / BASettlementIntervalMSSGenerationQuantity BuT’I’M’F’S’mdhi / CC 6475 – Real Time Uninstructed Imbalance Energy Settlement
21 / BASettlementIntervalMSSLoadDemandQuantity BuT’I’M’F’S’mdhi / CC 6475 – Real Time Uninstructed Imbalance Energy Settlement
1522 / BAResEntitySettlementIntervalMeteredCAISODemandQuantity BrtuT’I’Q’M’AA’F’R’pPW’QS’d’Nz’VvHn’L’mdhcif / MSS Netting Precalc
2316 / SettlementIntervalNodalMeteredCAISODemandQuantity_MDOverCA IntervalNodalMeteredCAISODemandQuantity_MDOverCA AA’mdhiAA’mdhcif / Measured Demand over Control Area Pre-calculation
2417 / HourlyNodalLDFChangeDAtoRT uM’AA’pmdh HourlyDANodalLDF uM’AA’ph / Real Time Price Pre-calculationCC 6475 – RT Uninstructed Imbalance Energy Settlement
25 / HourlyRTNodalLDF uM’AA’ph / Real Time Price Pre-calculation
26 / CAISOHourlyTotalVirtualAwardHASPCongestionAmount mdh / CC 6053 - Convergence Bidding HASP Energy, Congestion, Loss Settlement
2718 / CAISOHourlyRTVirtualSupplyOrDemandAwardCongestionSettlementAmountmdh / CC 6473 - Convergence Bidding Real –Time Energy, Congestion, Loss Settlement
19 / CAISO5MFMMEnergyCongestionAmount mdhcif / CC 6460 – FMM Instructed Imbalance Energy Settlement
20 / SettlementIntervalTotalIIIE1 BrtuT’I’M’F’S’mdhcif / Real-Time Energy Quantity Pre-calculation
21 / SettlementIntervalResidualIIE BrtuT’I’M’F’S’mdhcif / Real-Time Energy Quantity Pre-calculation
22 / SettlementIntervalMSSIIE BrtuT’I’M’F’S’mdhcif / Real-Time Energy Quantity Pre-calculation
23 / SettlementIntervalRealTimeUIE BrtuT’I’M’F’S’mdhcif / Real-Time Energy Quantity Pre-calculation
24 / SettlementIntervalTotalExceptionalIIEnoVSBS BrtuT’I’M’F’S’mdhcif / Real-Time Energy Quantity Pre-calculation
3.6CAISO Formula
Note: The formulas here assume that Demand quantities are negative while Supply quantities are positive, in particular, the external input for Measured Demand of Load (LOAD) and Exports (ETIE), as well as the corresponding Day-Ahead Schedules for those demand resources follow this sign convention. The same sign convention is assumed in coming up with the Imbalance Energy quantities.
3.6.1The pro-rata allocation of the Real Time Congestion Offset amount to Scheduling Coordinator B for Trading hour h
RTCongestionOffsetAllocation BmdhBh = (RTCongestionOffsetRatemdhh*BAHourlyMeasuredDemandMinusBalancedRightsQuantity_EX_RTM_CONGOFFBmdhBmdh)