NPRR 1209 Illustration Examples for Ancillary Service Resource Responsibilities
Dive into NPRR 1209 to understand how adjustments for Ancillary Service Resource Responsibilities are calculated in cases of SOC insufficiency, with detailed examples and calculations provided for clarity. Explore scenarios of sufficient SOC, insufficient SOC, multiple AS carrying, and intra-hour obligation changes.
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Presentation Transcript
NPRR 1209 Illustration with Examples PRS Special Meeting ERCOT staff November 30, 2023
Purpose and Context Purpose: to provide greater clarity on how adjustments to Ancillary Service (AS) Resource Responsibility due to insufficient State of Charge (SOC) under NPRR 1209 will be calculated and applied using different examples. 2 PUBLIC
NPRR 1209: Recap Provides for consideration of SOC insufficiency in the determination of Systematic AS Failed Quantity Calculations under NPRR 1149 SOC insufficiency will be reflected in adjustments to telemetered AS Resource Responsibilities (in a priority order) Adjusted values will then be used in adjustments to AS failed quantity calculations for a Qualified Scheduling Entity s (QSE s) portfolio 3 PUBLIC
SOC Insufficiency Calculation Security-Constrained Economic Dispatch (SCED) level data snapshots used to calculate values. Energy Management System (EMS) will calculate the insufficient Up Ancillary Service MW amount by dividing the insufficient State of Charge (SOC) MWh amount by the remaining time in the current Operating Hour. A similar process will be used to calculate the insufficient Down Ancillary Service MW amount by dividing the insufficient SOC headroom MWh by the remaining time in the Operating Hour. 4 PUBLIC
Examples The list of examples outlined below are meant to help illustrate whether/how AS insufficiency values are calculated and applied under different scenarios: 1. Sufficient SOC 2. Insufficient SOC 3. Insufficient SOC with carrying multiple AS 4. An example showing an intra-hour obligation change Each example includes: A slide which illustrates how adjustments to AS Resource Responsibility are applied with a calculated SOC insufficiency value A detailed calculation slide which illustrates how the average SOC insufficiency value is calculated using SCED-level 5 PUBLIC
Example 1: Sufficient SOC 6 PUBLIC
Example 1: Sufficient SOC 7 PUBLIC
Example 2: Insufficient SOC 8 PUBLIC
Example 2: Insufficient SOC 9 PUBLIC
Example 3: Insufficient SOC With Carrying Multiple AS 10 PUBLIC
Example 3: Insufficient SOC With Carrying Multiple AS 11 PUBLIC
Example 4: Intra-hour obligation change 12 PUBLIC
Example 4: Intra-hour obligation change 13 PUBLIC
