Configuration Guide for: GMC - Energy and Transmission Services Deviations and Market Usage Uninstructed Deviations - PIRP / Date: 04/01/09
Settlements & Billing
BPM Configuration Guide: GMC - Energy and Transmission Services Deviations and Market Usage Deviations - PIRP
CC 4546
Version 5.0
ÓCAISO, 2009 / Page 2 of 6Settlements & Billing / Version: 5.0
Configuration Guide for: GMC - Energy and Transmission Services Deviations and Market Usage Uninstructed Deviations - PIRP / Date: 04/01/09
Table of Contents
1. Purpose of Document 3
2. Introduction 3
2.1 Background 3
2.2 Description 3
3. Charge Code Requirements 4
3.1 Business Rules 4
3.2 Predecessor Charge Codes 4
3.3 Successor Charge Codes 4
3.4 Inputs – External Systems 4
3.5 Inputs - Predecessor Charge Codes or Pre-calculations 5
3.6 CAISO Formula 5
3.7 Outputs 5
4. Charge Code Effective Date 6
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
2.1 Background
Grid Management Charge Codes are monthly charges assessed on participating Scheduling Coordinators for the purpose of recovering all of the CAISO’s administrative and operating costs. These costs include, but are not limited to, startup, development and financing as well as the costs of ongoing operation and maintenance associated with the CAISO’s Control Area operator responsibilities. Grid Management Charges also include costs associated with administering the scheduling, bidding, dispatch, and settlement of all Energy and Ancillary Services.
GMC rates are calculated as set forth in Section 11 of the CAISO Tariff. The formula rate methodology provides Market Participants with the financial security of predictable GMC pricing while ensuring that the CAISO is able to recover its actual costs in a timely manner. The charges are shown as a monthly charge on the Settlements Statements for the last day of each month, with billable quantities being published on daily statements where applicable. GMC charges are one-sided and do not offset with any other Charge Code for neutrality.
2.2 Description
This charge is based on the absolute value of net uninstructed deviations over the month to reflect Participating Intermittent Resources (PIR) resources’ impact on the grid. Based on the CAISO tariff, the CAISO will provide PIRs with an independent third party, AWS True Wind Company, forecast. PIRS are required to schedule in accordance with the provided forecast in order to receive monthly netting treatment. By netting uninstructed deviations over the Settlement interval, CAISO is attempting to minimize PIRs exposure to imbalance energy charges. However, these uninstructed deviations place a burden on the transmission grid and Market Usage activities. This Charge Code is one of the Grid Management Charges CAISO uses to recover the costs of associated with managing the Control Area as well as the costs associated with Market Usage. This Charge Code is calculated based on the absolute value of net Uninstructed Deviations for a trading Month. The absolute value of net Uninstructed Deviations over the billing month is calculated as the difference between actual metered or Deemed Delivered energy and real-time dispatch instructions. Allowing netting permits SCs to load follow (match changes in load with changes in generation), which reduces inadvertent flows and imbalances on the transmission grid.
3. Charge Code Requirements
3.1 Business Rules
Bus Req ID / Business Rule /1.0 / This charge is a daily charge settled on the last day of each month.
2.0 / Where input Bill Determinants are not daily, or activity across a Bill Period is required to determine the appropriate Settlement Amount, the Charge Code shall be calculated on a monthly basis and output on the last Settlement Statement fora Trading Month.
2.1 / Where input Bill Determinants are daily, the Charge Code shall be calculated and output on a daily basis and summed to a Trading Month Value for invoicing.
3.0 / For adjustments to the Charge Code that cannot be accomplished by correction of upstream data inputs/recalculation or operator override Pass Through Bill Charge logic will be applied.
4.0 / Activity in this Charge Code is specific to Eligible PIRP resources.
5.0 / Settlements system shall be able to identify specific registered resources as exempted resources from this Charge Code.
3.2 Predecessor Charge Codes
Charge Code/ Pre-calc Name /CC 711 - Intermittent Resources Net Deviation Settlement
3.3 Successor Charge Codes
Charge Code/ Pre-calc Name /None
3.4 Inputs – External Systems
Row # / Variable Name / Description /1 / GMCPIRETSDeviationsandMarketUsageDeviationsRate / FERC approved GMC rate from settlements standing data based on applicable start and end dates.
2 / PTBChargeAdjustmentMonthlyEnergyandTransmissionServicesDeviationsAmount BJm / PTB adjustment variable for this Charge Code, amount per SC. ($)
3.5 Inputs - Predecessor Charge Codes or Pre-calculations
Row # / Variable Name / Predecessor Charge Code/Pre-calc Configuration
1 / MonthlyPIRNetDeviationQuantity Brtm / Monthly Net Uninstructed Deviation Quantity for Business Associate B, resource r, resource type t, for Trade Month m.
3.6 CAISO Formula
The ISO formula for the Monthly ETS and Market Usage Deviations charge for each PIRP Scheduling Coordinator is as follows:
3.6.1
GMCPIRETSandMarketUsageDeviationsAmount Bm = GMCPIRETSandMUDeviationsQuantity Bm * GMCPIRETSDeviationsandMarketUsageDeviationsRate
3.6.1.1 Where
GMCPIRETSandMUDeviationsQuantity Bm =
abs(MonthlyPIRNetDeviationQuantity Brtm)
3.6.1.2 GMCPIRETSDeviationsandMarketUsageDeviationsRate is the current FERC approved rate for the CAISO Control Area
3.7 Outputs
Output Req ID / Name / Description /In addition to any outputs listed below, all inputs shall be included as outputs.
1 / GMCPIRETSandMarketUsageDeviationsAmount Bm / The total GMC PIR Energy and Transmission Services Deviations and Market Usage Settlement amount attributed to Business Associate B in a Trading Month m
2 / GMCPIRETSandMUDeviationsQuantity Bm / The absolute value of the sum of net portfolio deviations of a PIR Business Associate B in Trading Month m.
4. Charge Code Effective Date
Charge Code/Pre-calc Name / Document Version / Effective Start Date / Effective End Date / Version Update Type /
CC 4546 – GMC ETS UE and MU UE - PIRP / 5.0 / 04/01/09 / Open / Documentation Edits Only
ÓCAISO, 2009 / Page 2 of 6