Solar PV Frequency Control in the U.S. EI and ERCOT Interconnections -- Case Studies and Recommendations

TL;DR

This paper analyzes solar PV frequency control methods in the U.S. EI and ERCOT grids, comparing their effects and providing recommendations for future standards based on detailed case studies.

Contribution

It offers a comparative analysis of various PV frequency control strategies using realistic grid models, informing future standard revisions.

Findings

Droop, inertia, and combined control methods have distinct impacts on grid stability.

High PV penetration requires tailored frequency control approaches.

Recommendations aim to enhance grid reliability with increased solar PV integration.

Abstract

This paper studied the solar PV frequency control in the U.S. Eastern Interconnection (EI) and Texas Interconnection (ERCOT) systems. The studied frequency control approaches include droop frequency control, inertia control, and droop-inertia-combined frequency control. The control effects of different frequency controls of PV in the EI and ERCOT are studied using actual high PV penetration interconnection grid models to provide suggestions to the future revision of future PV frequency control standards.