Configuration Guide for : Real Time Instructed Imbalance Energy Settlement / Date: 075/012/13091106/1201/1312/19/2013
Settlements & Billing
BPM Configuration Guide:Real Time Instructed Imbalance Energy Settlement
CC 6470
Version 5.21
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 Dates
1.Purpose of Document
The purpose of this document is to capture the business and functional requirements for the MRTU SaMC Real Time Instructed Imbalance Energy Settlement, Charge Code 6470.
2.Introduction
2.1 Background
With the implementation of MRTU, the current radial zonal model will be replaced with Full Network Model and Locational Marginal Price (LMP) model, which will also eliminate the use of Zones for the Settlement of Energy transactions. Locational Marginal Prices will be used in principle to settle Energy transactions. Price Locations and Aggregated Price Locations are defined on collections of network Nodes. A LMP will be calculated for each Price Location and each Aggregated Price Location.
The Real-Time Market (RTM) is a market for trading Energy and Ancillary Services in Real Time. The Bid submission for a given Trading Hour in the RTM is allowed after the Day Ahead Market result publication for the corresponding Trading Day and up to 75 minutes before the start of that Trading Hour. The Real-Time Market processes optimize Energy and Ancillary Services Bids with an objective of satisfying Real-Time Energy needs, mitigating Congestion, allowing resources providing Regulation service to return to preferred operating point within their regulating ranges and allowing recovery of Operating Reserves utilized in Real Time operation.
The Real-Time Economic Dispatch (RTED) is responsible for dispatching Imbalance Energy and Ancillary Services at regular intervals. RTED runs automatically every 5 min, at the middle of each 5-min interval. In addition RTED can be executed manually in Manual or Contingency Dispatch modes. Instructed Imbalance Energy (IIE) resulting from RT dispatched instructions will be calculated by CAISO usually by the end of next Trading Day.
The CAISO calculates and accounts for Imbalance Energy for each Dispatch Interval and settles Imbalance Energy for each Settlement Interval for each resource within the CAISO Control Area and all System Resources Dispatched in Real-Time.
Imbalance Energy consists of following:
- IIE – Instructed Imbalance Energy
- FMM Instructed Imbalance Energy Settlement (CC 6460)
- RTD Instructed Imbalance Energy Settlement (CC 6470)
- UIE – Real Time Uninstructed Imbalance Energy Settlement (CC 6475)
- UFE – Real Time Unaccounted for Energy Settlement (CC 6474)
To the extent that the sum of the Settlement Amounts for IIE, UIE, and UFE 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 for the relevant Settlement Interval.
In the Real-Time Market, the negative and positive Congestion Charges associated with a valid post-Day-Ahead TOR and ETC schedule change (including changes submitted to the Fifteen Minute Market and changes submitted closer to Real-Time where allowed by the contract) will be reversed in CC 6774 RT Congestion Offset. Because Congestion Charges are implicitly collected by the CAISO in the Real-Time settlement and there are no holders of rights to receive Real-Time Congestion revenues, all charges for Real-Time Congestion will be accumulated in a special and separate neutrality account to be distributed back to non-ETC Control Area metered Demand and exports on a per-MWh basis in Real Time Congestion Offset (CC 6774).
The CAISO calculates and accounts for Imbalance Energy for each Dispatch Interval and settles Imbalance Energy for each Settlement Interval for each resource within the CAISO Control Area and all System Resources Dispatched or scheduled in Real-Time.
Imbalance Energy consists of following:
IIE - Real Time Instructed Imbalance Energy Settlement (CC 6470) and HASP Energy, Congestion, Loss Pre-Dispatched Settlement (CC 6051)
UIE - Real Time Uninstructed Imbalance Energy Settlement (CC 6475)
UFE - Real Time Unaccounted for Energy Settlement (CC 6474)
To the extent that the sum of the Settlement Amounts for IIE, UIE, and UFE 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 for the relevant Settlement Interval.
In the Real-Time Market, the negative and positive Congestion Charges associated with a valid post-Day-Ahead TOR and ETC Self-Schedule change (including changes submitted to the Hour-Ahead Scheduling Process and changes submitted closer to Real-Time where allowed by the contract) will be reversed and settled in RTM Congestion Credit Settlement (CC 6788). Because Congestion Charges are implicitly collected by the CAISO in the Real-Time Settlement and there are no holders of rights to receive Real-Time Congestion revenues under the MRTU design, all charges for Real-Time Congestion will be accumulated in a special and separate neutrality account to be distributed back to non-ETC Control Area metered Demand and exports on a per-MWh basis in Real Time Congestion Offset (CC 6774).
2.2Description
The IIE Settlement Amount per Settlement Interval for each resource shall be calculated as the sum of the Settlement Amounts for the Standard Ramping Energy, MSS Load Following Energy, RTD Optimal EnergyEnergy Dispatched through the Real-Time Market optimization, the RTD Minimum Load Energy from units Dispatched in the Real-Time, Energy from Regulation, RTD Real-Time Pumping Energy, Ramping Energy Deviation, RTD Rerate Energy, Real-Time Self-Schedule Energy, Residual Imbalance Energy, Operational Adjustments, and the portion of Settlement Amounts for Exceptional Dispatches and emergency Energy as described below.
The Settlement Amounts for Energy dispatched through the Real-Time Market optimization, Minimum Load Energy, Energy from Regulation, Ramping Energy Deviation, Rerate Energy,Real-Time Pumping Energy, MSS Load Following Energy with gross election,and Real-Time Self-Scheduled Energy and Operational Adjustment for Day-Ahead and Real-Time shall be calculated as the product of the sum of all of these types of Energy and the Resource-Specific Settlement Interval RTD LMP. The Settlement Amount for the Standard Ramping Energy shall be zero. When the sign convention of the Instructed Imbalance Energy of the two Dispatch Intervals have the same sign or one of the Dispatch Interval IIE is equal to zero, the Real-Time Price Precalculation will compute the Resource-Specific LMP as the weighted average of the two 5-minute LMPs at the resource Location, where the weights are the resource’s specific Instructed Imbalance Energy MWh quantities in each of the two 5-minute Dispatch Intervals. If there is no Instructed Imbalance Energy or the sign convention of the Instructed Imbalance Energy of the two Dispatch Interval are different, then Settlement Interval Resource-Specific Real-Time LMP shall be calculated as the simple average of the individual LMPs for the Dispatch Intervals within the given Settlement Interval for the resource.
The Residual Imbalance Energy Settlement Amount shall be calculated as the sum of the products of the Residual Imbalance Energy quantities for the Dispatch Interval and the relevant Bid price that led to the Residual Imbalance Energy from the relevant Dispatch Interval in which the resource was dispatched. Further qualificationdescription on the price used is provided in the business rules section.
Energy instructions that are considered RTD Exceptional Dispatches or that are used to accommodate emergency Energy conditions represent transactions that are entered manually by the operator into the Real-Time Market optimization software so that they will be accounted for and be included in the communication of Dispatch Instructions to Scheduling Coordinators. RTD Exceptional Dispatch and emergency Energy instructions are not determined by the optimization software and shall not be eligible to set the LMP and are settled differently depending on the types of RTD Exceptional Dispatch or emergency Energy conditions that apply. The IIE for RTD Exceptional Dispatch and emergency Energy are first paid at the Resource-Specific Settlement Interval RTD LMP in CC 6470, and depending on the exact Energy type, the Excess Cost Payment will either be paid or charged in CC 6482, Real-Time Excess Cost for Instructed Imbalance Energy payment, or CC 6488, Exceptional Dispatch Uplift Settlement. CC 6482 settles the Excess Cost Payments for incremental Energy transactions where the Settlement type is one of the emergency “exceptional” Energy types (“SYSEMR” or “TEMR”). Decremental Energy transactions due to RTD Exceptional Dispatch or emergency Energy conditions are settled completely (without any excess cost breakdown) in CC 6470. CC 6488 covers Excess Cost Payments for both incremental and decremental Energy associated with RTD Exceptional Dispatches to mitigate or resolve Congestion due to Outage or derate conditions, transmission Constraints, or transmission-related modeling limitations.
The cost difference between the applicable Dispatch Interval Exceptional IIE Price and 10-minute Resource-Specific Settlement Interval LMP is calculated by resource and summed for each Settlement Interval. The following table describes the Settlement of Exceptional Dispatch and emergency Energy and Real Time Excess Cost Payments for Instructed Energy Settlement (CC 6482). Real Time Excess Cost Payments are allocated in two-tiers based total negative Uninstructed Imbalance Energy in Real Time Excess Cost Payments for Instructed Imbalance Energy Allocation (CC 6486) and Measured Demand in Excess Cost Neutrality Allocation (CC 6480). The Exceptional Dispatch Uplift Settlement is allocated to the Participating Transmission Owner (PTO) in whose PTO Service Territory the transmission-related modeling limitation is located.
Exceptional Dispatch/Transaction Type / Exceptional Dispatch Settlement Category / IIE Settlement(CC 6470) / Excess Cost for INC IIE
(CC 6482) / Exceptional Dispatch INC and DEC Uplift Settlement
(CC 6488)
Exceptional Dispatches used for System Emergency Conditions, to Avoid Market Intervention, Over-generation Conditions or to Prevent or Relieve Imminent System Emergencies including forced start-ups and shutdowns / SYSEMR / Paid or Charged at Resource-Specific Settlement Interval LMP / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) Bid, (2) the Default Energy Bid, or (3) negotiated price / N/A
Exceptional Dispatches used for System Emergency Conditions, to Avoid Market Intervention, Over-generation Conditions or to Prevent or Relieve Imminent System Emergencies including forced start-ups and shutdowns due to environmental, unit specific issues, or the Pmin issues / SYSEMR1 / Paid or Charged at Resource-Specific Settlement Interval LMP / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) Bid, (2) the Default Energy Bid, or (3) negotiated price / N/A
Energy purchased by the CAISO from a utility in another Control Area as a result of a CAISO request for assistance in System Emergency conditions, in order to avoid an intervention in market operations, or to prevent or relieve an imminent System Emergency / TEMR / Paid or Charged at Resource-Specific Settlement Interval LMP / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) supplier pre-established price, (2) negotiated price, or (3) default price as specified in CAISO Tariff / N/A
The Exceptional Dispatch associated with an Energy Bid or no bid to resolve Congestion as a result of a transmission-related modeling limitation not associated with a particular TO. / TModel / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
The Exceptional Dispatch associated with an Energy Bid or no bid to resolve Congestion as a result of a transmission-related modeling limitation due to the submission of inaccurate or incomplete information from a specific TO / TMODEL1 / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
The Exceptional Dispatch associated with an Energy Bid or no bid to resolve Congestion as a result of a transmission-related modeling limitation due to the submission of inaccurate or incomplete information from a specific TO / TMODEL2 / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
The Exceptional Dispatch associated with an Energy Bid or no bid to resolve Congestion as a result of a transmission-related modeling limitation due to the submission of inaccurate or incomplete information from a specific TO / TMODEL3 / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
The Exceptional Dispatch associated with an Energy Bid or no bid to resolve Congestion as a result of a transmission-related modeling limitation not associated with resources particular TO of resources / TMODEL4 / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
The Exceptional Dispatch associated with an Energy Bid or no bid to resolve Congestion as a result of a transmission-related modeling limitation due to the submission of inaccurate or incomplete information from a specific TO / TMODEL5 / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
The Exceptional Dispatch associated with an Energy Bid or no bid to resolve Congestion as a result of a transmission-related modeling limitation due to the submission of inaccurate or incomplete information from a specific TO / TMODEL6 / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
The Exceptional Dispatch associated with an Energy Bid or no bid to resolve Congestion as a result of a transmission-related modeling limitation due to the submission of inaccurate or incomplete information from a specific TO / TMODEL7 / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
Exceptional Dispatches for Non-Transmission-Related Modeling Limitations / NonTModel / INC IIE paid or Charged at max (Resource-Specific Settlement Interval LMP, Bid, the Default Energy Bid, or negotiated price)
DEC IIE paid or Charged at min (Resource-Specific Settlement Interval LMP, Bid, the Default Energy Bid, or negotiated price) / N/A / N/A
AS Testing / ASTest / Paid or Charged the max (Resource-Specific Settlement Interval LMP or Energy Bid) / N/A / N/A
Pre-commercial Operations testing for Generators / PreTest / Paid or Charged the max (Resource-Specific Settlement Interval LMP or Energy Bid) / N/A / N/A
TOR or ETC Schedule Changes after HASP / TORETC / Paid or Charged at the Resource-Specific Settlement Interval LMP. However, Congestion Charge reversal shall be made in CC 6788. / N/A / N/A
TOR or ETC Schedule Changes after HASP / TORETC1 / Paid or Charged at the Resource-Specific Settlement Interval LMP. However, Congestion Charge reversal shall be made in CC 6788. / N/A / N/A
Black Start / BS / Not included (settled in 3101) / N/A / N/A
Voltage Support / VS / Not included (settled in 3303) / N/A / N/A
RMR Test Energy / RMRT / Paid at Resource-Specific Settlement Interval LMP
Difference between Contract Price and Resource-Specific Settlement Interval LMP is paid on the RMR Invoice / NA / NA
RMR Energy Condition 2 / RMRRC2 / Paid at the Default Energy Bid Price / NA / NA
RMR Energy/ RMR/Substitution
Condition 1/2 / RMR/RMRS / Paid at Resource-Specific Settlement Interval LMP
Difference between Contract Price and Resource-Specific Settlement Interval LMP is paid on the RMR Invoice / N/A / N/A
OTHER / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / Paid or Charged the difference between Resource-Specific Settlement Interval LMP and one of the following: (1) negotiated price, (2) calculated price determined by CAISO Tariff
or in the case of T Model Bid
(1) Bid, (2) the Default Energy Bid, or (3) negotiated price
SLIC / SLIC / Paid or Charged at Resource-Specific Settlement Interval LMP / N/A / N/A
3.Charge Code Requirements
3.1Business Rules
Bus Req ID / Business Rule1.0 / RTD Instructed Imbalance Energy (IIE) is the calculated Energy expected to be produced or consumed as a result of responding to Real-Time Dispatch Instructions