Analysis on the effects of STATCOM on CSG based on RTDS

In 2013, CSG installed three ± 200Mvar STATCOMs on the 500kV substations which are adjacent to the receiving ends of multiple HVDC lines. This paper describes a test bed based on the RTDS Simulator that was developed to analyze the impacts of installing these STATCOMs. The impacts of the STATCOMs on voltage recovery and (U) HVDC fault recovery were investigated. The study shows the use of multiple STATCOMs can lead to an improvement in the voltage recovery capability at the inverter station, reduce the occurrence of commutation failures for some faults and improve HVDC power recovery. For some contingencies such as a circuit breaker failure, the improvements were significant. Meanwhile, for other contingencies of long time faults such as commutation failures caused by circuit breaker failure, the STATCOMs had negligible benefit.