Energy Storage Technologies in ERCOT Market
This content delves into the energy storage technologies introduced in the ERCOT market, including background information, guiding principles, metering configurations, data aggregation processes, and more. It covers the initiation of energy storage modeling, settlement rules, and considerations for various storage technologies such as batteries, flywheels, CAES, and more.
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
Storage Technologies Austin Rosel ERCOT March 8, 2017
Energy Storage Background Energy Storage Modeling and Settlements was initiated by PUCT rule, PUCT Project 39917 ERCOT market rules were initiated with NPRR 461 Rules were written to consider multiple types of storage technologies Batteries Flywheels CAES (Compressed Air Energy Storage) Pumped storage Electro chemical capacitors Thermal energy storage 2 PUBLIC
Energy Storage Guiding Principles 1. An energy storage resource has the option of receiving wholesale storage load treatment. 2. Wholesale Storage Load is defined in NPRR461 as Energy that is separately metered from all other Facilities to charge a technology that is capable of storing energy and releasing that energy at a later time to generate electric energy . 3. Load for an energy storage Load Resource must be separately metered to be considered wholesale storage load 4. Storage facility energy that is re-generated is treated in the same manner as traditional generation. The re-generated energy can self- serve associated Load behind the same POI at the generation site and/or be valued as an injection to the ERCOT system. 3 PUBLIC
Energy Storage Guiding Principles, Contd 5. Wholesale storage load is exempt from charges and credits based on Load Ratio Share or per MWH basis 6. Wholesale storage load will not be included in the ERCOT 4CP calculations. 7. Wholesale storage load pricing shall be based on the LMP at the electrical bus, not the LMP of the Load Zone 4 PUBLIC
Energy Storage Metering Metering configurations: will be based on ERCOT system design and capabilities for accounting for the wholesale storage load and site generation have separate wholesale storage load metering for each energy storage Load Resource will NOT be allowed if they do not conform to a design that allows ERCOT to settle the site 5 PUBLIC
Energy Storage Data Aggregation Data Aggregation processes: wholesale storage load will be included to determine total UFE will NOT be assigned Unaccounted for Energy (UFE) be included in Adjusted Metered Load (AML) be included in ERCOT 4CP calculations be included in TRE fee calculations have transmission and/or distribution losses added 6 PUBLIC
Energy Storage Settlement Settlement processes: wholesale storage load will be settled by QSE and Settlement Point be settled through Real-Time Energy Imbalance at a Resource Node be settled using an energy-weighted price at the bus (ESR load is LMP weighted average by telemeter ESR load) will NOT be included in any Load-shared charges and credits be settled using a Load Zone Settlement Point Price 7 PUBLIC
Current Energy Storage Resources Batteries: There are currently four batteries receiving Energy Storage Resource settlement CAES: There a few CAES projects in the works, but none are confirmed or operational 8 PUBLIC
RTEIAMT at Resource Node Settlement - 6.6.3.1(2) 9 PUBLIC
WSLAMTTOT - 6.6.3(3) Always <= 0 10 PUBLIC
RTEIAMT at Resource Node Settlement - 6.6.3(4) Can be + or - 11 PUBLIC
Supplemental Info http://www.ercot.com/calendar/2012/11/2/33277-RCWG esr_generation_metering_discussions_ver_5 00 12 PUBLIC
