ERCOT's Alex Lee presented an intermediate performance review of SCR819, tied to NPRR1111.
SCR819 was reactivated after the 2021 winter storm Uri and implemented in June 2024.
The goal of SCR819 was to improve control over Generic Transmission Constraints (GTCs) by curtailing all resources behind a GTC to avoid exceeding base points.
Results showed improved management of GTC flow, reducing spikes and maintaining flow closer to limits.
Examples from four different GTCs (Panhandle, West Texas, North Edinburgh to Lobo, and Zapata Starr) demonstrated improved flow control post-implementation.
ERCOT needs further analysis and testing to provide more training and guidelines for control room operators.
There was discussion about potential future improvements and additional analysis requirements.
Participants raised questions about hypothetical base points, exact system limits, and individual resource behavior affecting overall performance.
Future Actions:
ERCOT will continue testing and analysis to fine-tune settings and improve GTC flow management.
Further training and guidelines will be provided to control room operators based on continued testing and real-time data analysis.
Questions & Comments:
Clarifications were provided on hypothetical vs. actual base points and system limits.
Queries addressed resource behaviors exceeding base points and supervisory control systems (SCED) discount factors.
Participants expressed interest in seeing more quantified data on increased flow through interfaces post-implementation.
Presented by Samantha Finley from ERCOT's CRR market operations.
Discussion on LTAS data concerning submitted transactions and bidding behaviors.
Highlighted increasing performance issues and risks in ERCOT CRR LTAS auctions due to rising bid volumes.
Three resolution paths proposed to address these issues:
Administrative Guardrails: Instituting administrative limits to reduce transaction adjustment periods and long-running solution times, including limiting transactions per time of use and lowering bids per account holder.
Market Incentives: Implementing market incentives to scale back participation, such as increasing the minimum option bid price from one penny and introducing an unawarded bid fee for options.
Market Redesign: Considering market design changes, such as discontinuing multi-month bids in long-term auctions and adjusting network model percentages.
Discussion on the feasibility and impact of proposed solutions, including feedback from the council on potential market behaviors, relevant data, and suggested modifications.
Multiple stakeholders expressed support for examining transaction limits and bid adjustments, suggesting that studies should focus on separating the impact of options and obligations and assess multi-month bid removal benefits before implementing fee changes.
There was significant discussion on the potential unintended consequences of raising the minimum option bid price, advocating for possibly starting with lower incremental increases.
Consensus on conducting a study on how discontinuing multi-month bids could improve performance, and potentially prioritizing this study to address issues efficiently.
ERCOT committed to working on the study and filing an NPRR to allow use of administrative time of use limits and lowering of bids per account holder.
Stakeholders encouraged to sponsor NPRRs to expedite studies and impact analyses.
5 - NPRR1214 Reliability Deployment Price Adder Fix to Provide Locational Price Signals, Reduce Uplift and Risk - Ryan King/Shams Siddiqi
Shams Siddiqi from Rainbow Energy Marketing Corporation presented NPRR concepts, but did not have approvals from co-sponsors yet.
Siddiqi discussed the lack of an indifference payment in the ERCOT design, which causes incentive incompatibility with dispatch instructions.
Current design settles point prices at resource nodes higher than the SCED dispatch LMP due to RDPA.
Current RTC sends inefficient price signals, problematic for price-responsive resources and large flexible loads.
Siddiqi highlighted examples illustrating inefficient price signals and impacts on resources like Turkey Track Wind and Wolf Hollow.
Discussed indifference payment calculations and potential system and implementation impacts, including effects on RDPA rates and incentive compatibility.
Acknowledged ERCOT’s previous feedback and addressed issues related to energy storage resources, DC Tie curtailments, and other concerns.
Mentioned potential risks and resources required for implementing changes before and after RTC+B.
Highlighted the importance of indifference payments for system reliability and minimizing consumer costs.