A Comparative Study of the Influence of BESS and STATCOM on Post-Fault Voltage Recovery in Microgrid

Abstract

Reliable and efficient power flow in the electrical grid is crucial given network expansion and the incorporation of numerous renewable sources. Microgrids are becoming more and more important in the global energy sector due to its numerous benefits. The variable nature of distributed energy resources (DER) in microgrid makes large-scale DER integration potentially unstable for system voltage. Grid regulations place restrictions on the voltage control of DER unit, which raises the need for reactive power support. Proper placement of flexible AC transmission system (FACTS) under post-fault conditions may enable faster voltage recovery. In this work, battery energy storage system (BESS) and static synchronous compensator (STATCOM) have been considered for improving the post-fault voltage in DER integrated weakly grid-connected microgrid system. Two operation scenarios have been considered for analyzing the behavior of BESS and STATCOM individually at post-fault situation. According to the results of the simulation, BESS requires lesser rating than STATCOM for faster recovery of post-fault voltage of the system.

Advances in FACTS Technology for Transient Stability in Power Systems

“…Due to the decreasing initial cost of battery energy storage systems (BESS), there is an increasing consideration for using more STATCOMs with BESS to manage power system transients [96]. Although BESS has demonstrated superior post-fault voltage restoration performance compared to STATCOM individually [97]- [99], a hybrid solution combining both devices has been shown to yield even greater benefits for transient response [100]- [105]. In recent years, there has been growing consideration and testing of PV inverters as a means of supporting transient stability, driven by increasingly stringent grid codes and the desire to maximize the potential of already-installed PV systems [106]- [110].…”