System-wide vs Local RDPA Comparison Analysis 2022
Explore a detailed comparison of system-wide vs local Real-Time Dispatch Price Adjustment (RDPA) analysis in the ERCOT Congestion Management Working Group. The analysis covers various operating days with Renewable Energy Curtailments and pricing discrepancies, shedding light on critical insights for energy market stakeholders.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
System-wide vs Local RDPA Comparison Thomas Urquhart Engineer, Market Analysis & Validation ERCOT Congestion Management Working Group (CMWG) July 18, 2022
Background This analysis provides supplemental info for the discussion of RDPA on 6/13/2022. Five Operating Days with RUCs were analyzed: 9/21/2021 high wind, high curtailment that quickly turned into moderate wind, low curtailment around settlement interval 75 2/24/2022 stressed grid conditions; low wind, very low curtailment, high RDPA 3/29/2022 high wind, high curtailment 4/22/2022 discussed on 6/13/2022; high wind, high curtailment 5/13/2022 low wind, low curtailment For each OD, we compare: BP and LMP deltas between the pricing and dispatch runs during the SCED interval with the highest total calculated indifference payment* Current RTRDASIAMT (reliability component of AS imbalance payment) to calculated indifference payments Indifference payments by fuel type *Calculation as proposed by Shams Siddiqi here Indifference payment = LMP * BP; only consider positive values We do not consider the change to energy payments 2 PUBLIC
9/21/2021 15:15, RDPA = $0.00/MWh Red, positive values represent pricing run value > dispatch run value 3 PUBLIC
4 PUBLIC
2/24/2022 08:10, RDPA = $1,391.63/MWh Red, positive values represent pricing run value > dispatch run value 5 PUBLIC
6 PUBLIC
3/29/2022 14:45, RDPA = $16.58/MWh Red, positive values represent pricing run value > dispatch run value 7 PUBLIC
8 PUBLIC
4/22/2022 15:50, RDPA = $374.94/MWh Red, positive values represent pricing run value > dispatch run value 9 PUBLIC
10 PUBLIC
5/13/2022 14:45, RDPA = $0.00/MWh Red, positive values represent pricing run value > dispatch run value 11 PUBLIC
12 PUBLIC
Observations There are two major factors that cause large differences in the pricing run relative to the dispatch run: the removal of RUCed resources which moves LMPs up and the ramp rate relaxation to 60 minutes which moves LMPs down. The calculated indifference payments are generally lower than the current RTRDASIAMT. However, there are days with a negative RTRDASIAMT which cannot happen for the indifference payment. There isn t one fuel type that dominates indifference payments. This calculation is driven by marginal resources which are typically thermal plants. 14 PUBLIC
