Energy Storage Metering in ERCOT Market
Explore the evolution of energy storage metering in ERCOT, including nodal pricing implementation tied to EPS meters, metering requirements, scenarios, and future considerations for wholesale storage load. Join the market discussions on the future concepts for WSL implementation.
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Presentation Transcript
Energy Storage Metering ERCOT Staff MWG July 23, 2020
Some background History of Wholesale Storage Load Commission rule on WSL clearly contemplates WSL for distribution-connected batteries Initial implementation timeline needed a quick solution to accommodate project in development ERCOT implementation required the unit to be a Generation Resource/CLR with EPS metering The market has evolved Batteries are become increasingly common deployments Market is looking at definitions for SOES NPRR 917 creates nodal pricing for SODG Market wants same pricing for batteries when charging & discharging and if this pricing is nodal then the charging energy must be separately metered Some thoughts on the future Should nodal pricing implementation be tied to EPS Meters or is it time to consider alternative implementation options? Metering requirements would be the same whether (non-WSL) nodal pricing or WSL implementation Timing seems ripe for market discussions on future concepts for WSL implementation 2 PUBLIC
Observations on metering requirements Nodal pricing of SOES Nodal WSL or nodal non-WSL Metering at the SDP to measure generation exports Separate metering of charging energy Either as currently required or with NPRR 1020 solution Metering scenarios 1. Stand alone, auxiliary loads connected at a separate delivery point 2. Stand alone, auxiliary loads connected behind the same delivery point 3. Retail load and auxiliary loads connected behind the same delivery point 3 PUBLIC
SOES - Scenario #1 Stand alone, auxiliary loads connected at a separate delivery point 4 PUBLIC
SOES Scenario # 2 Stand alone, auxiliary loads connected behind the same delivery point 5 PUBLIC
SOES - Scenario # 3 Retail load and auxiliary loads connected behind the same delivery point 6 PUBLIC
Questions? 7 PUBLIC
