Berkeley Lab report investigates the implications of a regional resource adequacy program on utility integrated resource planning

December 4, 2020

Berkeley Lab collaborated with the Western Interstate Energy Board (WIEB) and the University of Texas-Austin to investigate the implications of a regional resource adequacy (RA) program on utility integrated resource planning (IRP). This report, Implications of a regional resource adequacy program on utility integrated resource planning: Study for the Western United States, is focused on an active policy discussion to develop a novel voluntary program to share capacity resources and improve RA in the Western Interconnection. 

Please join us for a webinar hosted by WIEB to learn more about this report. The webinar will be held on January 15th, 2021 at 10 am PT. Register for the webinar here:

This report identifies two RA components of IRP that will be highly impacted by a regional RA program: resource capacity accreditation and RA targets. There are at least four resources that will require specific attention for their capacity credit calculations: (1) variable renewable resources, (2) demand-side resources, (3) hydroelectric resources, and (4) power purchase agreements. It will also be necessary to decide on a RA target reliability metric (e.g., a planning reserve margin) that is at least the minimum requirement in IRPs to ensure consistency in RA requirement calculations. The report finds that load forecasting and transmission expansion analyses will be moderately impacted, but that most of IRP components will be not significantly impacted.

The report includes a review of traditional resource adequacy practices in IRP; a case study of an existing regional RA program that interacts with IRP (Southwest Power Pool) and it presents the Northwest Power Pool (NWPP) regional resource adequacy proposal that is a focus of this research. This paper addresses three research questions:

  • How would typical IRP processes change if a utility joined a regional RA program?
  • Which RA elements would remain local (i.e. within IRP) and which would become regional (i.e. within the RA program)?
  • How much control would utilities and states retain over their utility resource mixes considering the influence of a regional RA program?

This paper is primarily written for state policymakers, public utility commission staff, and resource planners from states in the NWPP footprint that are pondering how their IRP guidelines and regulations may need to adjust to operate jointly with a regional RA program. The content of this paper may also help the NWPP RA program developer as it interacts with potential member states and utilities to understand what aspects of energy policy may be influenced by the program.

This work was funded by the Energy Resilience Division of the U.S. Department of Energy’s Office of Electricity under Lawrence Berkeley National Laboratory Contract No. DE-AC02-05CH11231.


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