Performance Indices for the Dynamic Performance of FACTS and FACTS with Energy Storage

Abstract

The integration of energy storage into flexible AC transmission systems (FACTS) devices leads to increased controller flexibility by providing decentralized active power capabilities. Combined FACTS/energy storage systems (ESS) can improve power flow control, oscillation damping, and voltage control. This article presents performance indices that have been developed for quantifying the active power, reactive power, and voltage performance enhancement of different FACTS combinations. The dynamic responses of a shunt (StatCom), a StatCom/battery energy storage system (BESS), a synchronous series compensator (SSSC), a SSSC/BESS, and a unified power flow controller (UPFC) are presented to support the validity of the developed indices.