Flexible Ramp up Capacity Payment
Flexible Ramp Up Capacity Payment / Date: 9/26/11
Settlements & Billing
Flexible Ramp Up Capacity Payment
CC 7050
Version5.0
CAISO, 2018 / Page 1 of 9Settlements & Billing / Version: 5.0
Flexible Ramp Up Capacity Payment / Date: 9/26/11
Table of Contents
1.Purpose of Document
2.2. 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.
2.2. 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 section 11.25, resources that resolve the flexible ramping constraint are compensated in Settlements at the shadow price of the constraint. The flexible ramping constraint shadow price is the marginal unit’s resource specific opportunity cost. The costs associated with such compensation are allocated to measured demand, which consists of metered load and exports.
2.2Description
In this Charge Code 7050, payments are applied to resources with awarded flexible ramping capacity in the real-time pre-dispatch process (RTPD). The capacity payment per resource shall be computed based on the flexible ramping up capacity award and the shadow price of the flexible ramping up constraint.
Allocation of the costs from flexible ramping capacity payments shall be made through a separate charge code, CC 7056 Flexible Ramp Cost Allocation.
3.Charge Code Requirements
3.1Business Rules
.
Bus Req ID / Business Rule1.0 / The flexible ramping up capacity payment per resource per settlement interval shall be computed based on the awarded flexible ramping up capacity of the resource and the shadow price for the flexible ramping constraint that it helps resolve.
1.1 / Currently, only flexible ramping up (as opposed to ramping down) capacity shall be evaluated and awarded in the market optimization. (Fact)
1.2 / This charge code can be a payment or a charge, although in most cases, it will be a payment. The shadow price comes in as positive, which results in a payment, and in a few cases, the shadow price can be negative, which then results into a charge or a negative payment.
2.0 / An RTPD interval spans 15minutes. There are four (4) RTPD intervals per hour, starting at the beginning of a Trading Hour, and repeating every 15minutes thereafter. A settlement interval is defined to be a 10-minute interval. There are six (6) settlement intervals per hour, starting at the beginning of a Trading Hour, and repeating every 10 minutes thereafter. (Fact)
2.1 / The hourly ramp up capacity (in MW) award for a resource for each RTPD interval shall be divided by 12 to come up with the relevant 5-minute interval ramp up MW for the resource.
2.2 / The shadow price for flexible ramping up capacity of a resource per RTPD interval shall be replicated in each of the three 5-minutes of that same RTPD interval to come up with 5-minute interval shadow prices.
2.3 / A 5-minute flexible ramp up capacity assessment per resource shall be calculated as the product of the 5-minute interval ramp up MW and the corresponding 5-minute interval shadow price for the resource.
2.4 / Each two consecutive 5-minute flexible ramp up capacity assessments for a resource (over a settlement interval) shall be summed up to get the settlement interval flexible ramping up capacity payment for the resource.
3.0 / The flexible ramp up capacity payment per BA per settlement intervalis the sum of the BA’sflexible ramping capacity payments for all its resources for that settlement interval.
4.0 / All awarded flexible ramping capacity shall be deemed delivered and all of the awarded capacity shall be compensated.
4.1 / Compensation from flexible ramping capacity for a resource shall not be counted towards the revenue of the resource in the computation of bid cost recovery.
5.0 / 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.
3.2Predecessor Charge Codes
Charge Code/ Pre-calc NameNone
3.3Successor Charge Codes
Charge Code/ Pre-calc NameCC 7056 – Flexible Ramp Cost Allocation
3.4Inputs – External Systems
Row # / Variable Name / Description1 / BAResourceFlexRampUpCapacityAwardBrtF’S’hc / Flexible ramping up capacity award for resource r, associated with Business Associate B, resource type t, entity component type F’, entity component subtype S’, for the 15-minute RTPD interval c. (MW)
2 / BAResourceFlexRampUpShadowPrice Brthc / The shadow price for flexible ramping up constraint associated with resource r, Business Associate B, resource type t, for the 15-minute RTPD interval c. ($/MW)
3 / PTBChargeAdjustmentFlexRampUpPaymentAmountBJhi / Pass Through Bill (PTB) amount for this Charge Code to be settled with Business Associate B, identified by PTB ID J, for Trading Hour h, Settlement Interval i. ($)
3.5Inputs - Predecessor Charge Codes or Pre-calculations
Row # / Variable Name / Predecessor Charge Code/Pre-calc Configuration
None
3.6CAISO Formula
3.6.1BASettlementIntervalResourceFlexRampUpCapacityPayment
BASettlementIntervalResourceFlexRampUpCapacityPaymentBrtF’S’hi=
BADispatchIntervalResourceFlexRampUpCapacityAssessmentBrtF’S’hif
3.6.1.1BADispatchIntervalResourceFlexRampUpCapacityAssessment
BADispatchIntervalResourceFlexRampUpCapacityAssessment BrtF’S’hif =
(-1)*BADispatchIntervalResourceFlexRampUpCapacityAward BrtF’S’hif
* BADispatchIntervalResourceFlexRampUpShadowPrice Brthif
3.6.1.2BADispatchIntervalResourceFlexRampUpCapacityAward
BADispatchIntervalResourceFlexRampUpCapacityAward BrtF’S’hif =
BAResourceFlexRampUpCapacityAwardBrtF’S’hc/ 12
Implementation Note: The 15-minute flexible ramping up capacity award is an hourly value. In converting BAResourceFlexRampUpCapacityAward BrtF’S’hc to a 5-minute value above, attribute c is dropped and is replaced by attribute f for the 5-minute interval output.
3.6.1.3BADispatchIntervalResourceFlexRampUpShadowPriceBADispatchIntervalResourceFlexRampUpShadowPriceBrthif =
BAResourceFlexRampUpShadowPriceBrthc
Implementation Note: The 15-minute RTPD shadow price shall be replicated in each of the 5-minute intervals of the 15-minute RTPD interval. With this process, attribute c is dropped and is replaced by attribute f for the 5-minute interval output.
3.6.2BASettlementIntervalFlexRampUpCapacityPayment
BASettlementIntervalFlexRampUpCapacityPayment Bhi=
BASettlementIntervalResourceFlexRampUpCapacityPayment BrtF’S’hi
3.6.3CAISOSettlementIntervalTotalFlexRampUpCapacityPayment
CAISOSettlementIntervalTotalFlexRampUpCapacityPaymenthi=
(BASettlementIntervalFlexRampUpCapacityPayment Bhi+
PTBChargeAdjustmentFlexRampUpPaymentAmountBJhi)
Implementation Note: The above charge type is provided as part of reporting structure and is not configured as 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 / BADispatchIntervalResourceFlexRampUpCapacityAward BrtF’S’hif / The 5-minute interval flexible ramp up MWh for resource r, Business Associate B for resource type t,Entity Component Type F’, Entity Component Subtype S’,for Trading Hour h, Settlement Interval i, DispatchInterval f. (MWh)
3 / BADispatchIntervalResourceFlexRampUpShadowPrice Brthif / The 5-minute interval shadow price of the flexible ramping up constraint associated with resource r, Business Associate B, resource type t,for Trading Hour h, Settlement Interval i, DispatchInterval f. ($/MWh)
4 / BADispatchIntervalResourceFlexRampUpCapacityAssessment BrtF’S’hif / The 5-minute flexible ramp up capacity assessment per resource r, Business Associate B, resource type t,Entity Component Type F’, Entity Component Subtype S’,for Trading Hour h, Settlement Interval i, DispatchInterval f. ($)
5 / BASettlementIntervalResourceFlexRampUpCapacityPaymentBrtF’S’hi / The settlement interval flexible ramp up capacity payment per resource r, Business Associate B, resource type t,Entity Component Type F’, Entity Component Subtype S’,for Trading Hour h, Settlement Interval i. ($)
6 / BASettlementIntervalFlexRampUpCapacityPayment Bhi / The payment to Business Associate B for the total awarded flexible ramp up capacity of all resources associated with B for Trading Hour h and Settlement Interval i. ($)
7 / CAISOSettlementIntervalTotalFlexRampUpCapacityPayment hi / The CAISO total flexible ramp up capacity payment to all Business Associates for Trading Hour h and Settlement Interval i. ($)
4.Charge Code Effective Date
Charge Code/Pre-calc Name / Document Version / Effective Start Date / Effective End Date / Version Update Type
CC 7050 – Flexible Ramp Up Capacity Payment / 5.0 / 12/13/11 / Open / Configuration Impacted
CAISO, 2018 / Page 1 of 9