Configuration Guide for: Flexible Ramp Supply Cost Allocation Reversal / Date: 10/12/125/27/16
Settlements & Billing
BPM Configuration Guide: Monthly Flexible Ramp Supply Cost Allocation Reversal
CC 7057
Version5.0
CAISO, 2018 / Page 1 of 7Settlements & Billing / Version: 5.0
Configuration Guide for: Flexible Ramp Supply Cost Allocation Reversal / Date: 10/12/125/27/16
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
A flexible ramping constraint applies as part of the market optimization for the real-time unit commitment or pre-dispatch process (RTPD), and the real time dispatch (RTD) process. This constraint addresses certain reliability and operational issues observed in the ISO’s operation of the grid.
In accordance with Tariff, resources that resolve the flexible ramping constraint are to be compensated in Settlements at the Flexible Ramping Constraint Derived Price. The Flexible Ramping Constraint Derived Price is equal to the lesser of:
1) $800/MWh; or
2) the greater of: a) zero, or b) Real-Time Spinning Reserve Ancillary Service Marginal Price; or the c) Flexible Ramping Constraint Shadow Price minus seventy-five percent of the maximum of zero or the simple average Real-Time System Marginal Energy Cost in an applicable RTUC interval .
The Flexible Ramping Constraint Shadow Price is the marginal unit’s resource specific opportunity cost. The costs associated with such compensation net of rescinded amounts are allocated twenty-five percent to daily gross negative supply deviations and seventy-five percent to hourly measured demand, which consists of metered load and exports. At the end of each month, the costs allocated to daily gross negative supply deviations will be reversed and re-allocated to monthly gross negative supply deviations.
2.2Description
In Charge Code 7057 -Monthly Flex Ramp Up Supply Cost Allocation Reversal, the daily Flexible Ramp Supply costs allocated to suppliers are summed to a monthly total and then reversed. The monthly total Flexible Ramp Supply costs will then be reallocated in Charge Code 7058 Monthly Flex Ramp Up Supply Cost Allocation based upon monthly gross negative supply deviations.
3.Charge Code Requirements
3.1Business Rules
.
Bus Req ID / Business Rule1.0 / The Charge Code will reverse the daily Flexible Ramp Up Supply Costs Amounts allocated to suppliers.
2.0 / The CAISO total Flexible Ramp Up Supply Cost Reversal Amount will be reallocated to suppliers in Charge Code 7058 – Monthly Flexible Ramp Supply Allocation.
2.1 / The CAISO total Flexible Ramp Up Supply Cost Reversal Amount shall be allocated to monthly gross negative supply deviations.
3.0 / The net imbalance amount calculated as the sum of the final Settlement amounts for Charge Codes 7057 and 7058 in a given trade month is attributed to rounding and must be output to CC 4999 Monthly Rounding Adjustment Allocation.
3.2Predecessor Charge Codes
Charge Code/ Pre-calc NameCC 7056 – Flexible Ramp Up Cost Allocation
3.3Successor Charge Codes
Charge Code/ Pre-calc NameCC7058 – Monthly Flex Ramp Up Supply Cost Allocation
CC 4999 – Monthly Rounding Adjustment Allocation
3.4Inputs – External Systems
Row # / Variable Name / Description3.5Inputs - Predecessor Charge Codes or Pre-calculations
Row # / Variable Name / Predecessor Charge Code/Pre-calc Configuration
1 / BADailyResourceFlexRampSupplyCostAllocationAmount BrtF’S’md / CC 7056 – Flexible Ramping Cost Allocation
3.6CAISO Formula
3.6.1BAMonthlyResourceFlexRampSupplyCostAllocationRevAmount
BAMonthlyResourceFlexRampSupplyCostAllocationRevAmount BrtF’S’m = (-1) *BAMonthlyResourceFlexRampSupplyCostAllocationAmount BrtF’S’m
3.6.2BAMonthlyResourceFlexRampSupplyCostAllocationAmount
BAMonthlyResourceFlexRampSupplyCostAllocationAmount BrtF’S’m= BADailyResourceFlexRampSupplyCostAllocationAmount BrtF’S’md
3.6.3BAMonthlyFlexRampSupplyCostAllocationRevAmount
BAMonthlyFlexRampSupplyCostAllocationRevAmount Bm = BAMonthlyResourceFlexRampSupplyCostAllocationRevAmount BrtF’S’m
Implementation Note: This is provided as part of reporting structure and is not configuredas an individual charge type.
3.6.4CAISOMonthlyTotalFlexRampSupplyCostRevAllocationAmount
CAISOMonthlyTotalFlexRampSupplyCostRevAllocationAmountm=
BAMonthlyFlexRampSupplyCostAllocationRevAmount Bm
Implementation Note: This is provided as part of reporting structure and is not configuredas an individual charge type.
3.7Outputs
Output Req ID / Name / Description1 / In addition to any outputs listed below, all inputs shall be included as outputs. / All inputs.
2 / BAMonthlyResourceFlexRampSupplyCostAllocationAmount BrtF’S’m / Total Monthly Flex Ramp Supply Cost Allocation Amount per Business Associate B, resource r, resource type t, Entity Component type F’, Entity Component Subtype S’for Trade Month m
3 / BAMonthlyResourceFlexRampSupplyCostAllocationRevAmount BrtF’S’m / Total Monthly Flex Ramp Supply Cost Allocation Reversal Amount per Business Associate B, resource r, resource type t, Entity Component type F’, Entity Component Subtype S’for Trade Month m
4 / BAMonthlyFlexRampSupplyCostAllocationRevAmount Bm / Total Monthly Flex Ramp Supply Cost Allocation Reversal Amount per Business Associate B for Trade Month m
5 / CAISOMonthlyTotalFlexRampSupplyCostRevAllocationAmount m / Total Monthly Flex Ramp Supply Cost Allocation Reversal Amountfor Trade Month m
4.Charge Code Effective Date
Charge Code/Pre-calc Name / Document Version / Effective Start Date / Effective End Date / Version Update Type
CC 7057 – Monthly Flexible Ramp Supply Cost Allocation Reversal / 5.0 / 11/1/12 / Open9/30/16 / Configuration Impacted
CAISO, 2018 / Page 1 of 7