Webinar: Evolution of ERCOT’s Frequency Control and Ancillary Services for Higher Levels of Inverter-Based Generation

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Featured Speaker: Julia Matevosyan, ERCOT 

Julia Matevosyan is Lead Planning Engineer at the Electric Reliability Council of Texas (ERCOT), Resource Adequacy Group, primarily working on adequacy of system inertial response, system flexibility, frequency control and performance issues related to high penetration levels of inverter-based generation. Her other interests are integration of storage and distributed generation. Julia is a member of CIGRE Working Group C2/C4.41 “Impact of High Penetration of Inverter-based Generation on System Inertia of Networks” and serves on a number of the technical advisory committees for projects related to high penetration of inverter-based generation carried out by NREL, EPRI, NERC, Hawaiian Electric, Xcel Energy and the EU-SysFlex project consortium.

Julia received her BSc from Riga Technical University in Latvia, and her MSc and PhD from the Royal Institute of Technology (KTH) in Sweden. Prior to joining ERCOT she was with the consulting firms Parsons Brinkerhoff (now WSP) and Sinclair Knight Merz (now Jacobs), working primarily on system planning studies, grid interconnection and grid code compliance studies for wind power plants around the world.

Moderator: Charlie Smith, ESIG Executive Director

Registration Cost: FREE

Webinar Abstract: ERCOT serves as the independent system operator (ISO) for approximately 90% of the electric load in Texas. The Texas Interconnection only connects to the neighboring grids through 1.2 GW of HVDC ties. Therefore, ERCOT is solely responsible for maintaining reliability at the interconnection level. By the end of 2018, approximately 23.5 GW of inverter-based generation was installed in ERCOT (wind, solar and storage). More than 42 GW of inverter-based generation is expected to be online by the end of 2021, based on the projects in the interconnection queue with signed interconnection agreements. As the penetration of inverter-based generation (so far primarily wind) has grown in the ERCOT system, the ISO has been proactive and introduced a number of innovative and dynamic measures to maintain frequency performance of the interconnection (such as primary frequency response requirement from all generators, system inertia monitoring, and reserve sufficiency monitoring). This webinar will discuss these measures, when and why they were introduced, and related initiatives underway at ERCOT.