Analysis of DC voltage balancing of cascaded STATCOM on startup or standby state

DC voltage balancing is one of important factors affecting the normal operation of cascade STATCOM device. At present, there are many discussions and researches about the DC voltage in normal operation, but few in the device start up or standby. The distribution of cascaded STATCOM DC voltage is discussed, based on cascaded STATCOM equivalent model, on the startup and standby modes. The analysis shows that the balancing problem of DC voltage also exists in the standby state, and puts forward the solving measures. Solve of the DC voltage balancing problem on the startup and standby mode, is an important part of the STATCOM operation of the device. The conclusion has certain significance to the device design and fault detection.(from magazine Electrotechnical Application5/2020 on theoretical analysis.)

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