A new topology of a battery energy storage system

Abstract

This paper describes a new topology of a battery energy storage system (BESS) that can provide simultaneously fast control of both its MW and MVAr outputs to improve power system operation and control. The proposed BESS topology also provides several other important contributions to the power systems such as active harmonic filtering to meet power quality standards, load leveling, damping of inter-area oscillations, damping of transient stability, effective and fast control of power flow along a transmission line corridor, many of the flexible AC transmission system (FACTS) features, and emergency supply on loss of AC source (very similar to UPS applications). This paper shows that BESS can offer an important resource for improving power system control.