The Smart Electric Power Alliance (SEPA) has announced a new report that covers the technical capabilities of distributed energy resources (DERs) – including solar, storage, energy efficiency and demand management – to provide critical grid-support services to help utilities maintain reliability as they integrate more intermittent renewables.
SEPA says that the “Distributed Energy Resources Capabilities Guide,” the third release of its Beyond the Meter series focused on energy system transition, evaluates each DER resource for its potential to provide specific kinds of support, such as load following and balancing, and voltage and frequency regulation, as shown in the guide’s DER capabilities matrix.
“Traditionally, utilities and regulators have looked to fast-starting but expensive ‘peaker’ plants for flexible backup for renewables,” said Ryan Edge, SEPA research analyst and lead author on the report. “But going forward, DERs could provide equally flexible and less costly solutions. For example, peakers typically take 10 minutes or more to ramp up; batteries and advanced inverters could provide much faster response times – in some cases, even less than one second.”
Edge noted that some of the resources in the guide are currently prevented from providing specific capabilities – although they could – due to regulatory constraints or current market conditions. In other instances, such as in PJM Interconnection’s market, they are already being used for ancillary service regulation.
“Our impetus for writing this report is to help familiarize utility planners and grid operators with these resources now, so they can integrate them into their systems as energy markets and regulatory landscapes evolve – and the technologies get even better,” Edge said.
“SEPA’s ‘DER Capabilities Guide’ is an excellent resource for our industry,” commented Carmine Tilghman, senior director of energy supply at Tucson Electric Power, which is currently conducting a number of DER pilots. “With so many technologies and programs, coupled with varying operational and reliability requirements around the country, it can sometimes be difficult to sort fact from fiction when discussing the capabilities of these distributed resources. SEPA does a great job identifying the various technologies and providing simple, accurate explanations of the necessary services and what they mean.”
More information on the new guide is available here.
Chart courtesy of SEPA