NYISO’s Business Issues Committee voted Wednesday to recommend approval of Tariff revisions to streamline the ISO’s transmission planning and expand its scope to capture the grid’s ability to deliver energy from the future generation resource mix to the forecasted load.
The changes rename the Congestion Analysis and Resource Integration Study (CARIS) as the draft System & Resource Outlook and double the assessment periods to 20 years, consistent with the study period for proposed economic or public policy transmission projects. They also remove language requiring time-intensive staff work of little value, such as the evaluation of generic solutions to the same “top three” congested paths each cycle.
The new rules also will affect the ISO’s consideration of non-bulk power transmission facilities by incorporating transmission owners’ local transmission plans into the economic planning process.
“We wanted to make this clarification because we are planning on working with transmission owners a bit closer in our model development just to make sure that we’re capturing all the information necessary and have the coordination we find necessary to produce the best study possible,” Manager of Economic Planning Jason L. Frasier said. If the Management Committee and Board of Directors approve the Attachment Y Tariff revisions, the ISO will make a Section 205 filing with FERC in January.
Clarification: Landfill Gas Covered under Tailored Availability Metric
The BIC also voted to recommend MC approval of a clarification to apply the ISO’s new Tailored Availability Metric (TAM) rules to landfill gas resources, as well as wind and solar. (See “Tailored Availability Metric OK’d,” NYISO Management Committee Briefs: April 29, 2020.)
FERC accepted the TAM rules in September for intermittent resources for implementation with the day-ahead market run for May 1, 2021 (ER20-2337).
The clarification will replace the terms “wind and solar resources” with “intermittent power resources,” which includes landfill gas, in section 5.12.14.3 of the Market Administration and Control Area Services Tariff.
The TAM rules change how the ISO measures the amount of unforced capacity (UCAP) intermittent resources can sell — calculated as installed capacity less the resource’s derating factor. While thermal resources’ derating is based on forced outages, intermittent resources’ derating is based on their historic performance during certain peak load hours.
The BIC also approved modifications to the Control Center Requirements Manual to incorporate tariff modifications made in November related to utilization of meter services entities (MSEs) for demand-side resources. (See “Other Approvals” in NYISO OKs Changes on Hybrid, Fast Start Resources, TCCs.)