Improving stability of power system by forced commutation static VAr compensator

Recent development of high power semiconductor switching devices with turn off ability makes it possible to use voltage source type forced commutation (VSFC) power converters for high power reactive compensation in a large power system. The authors have investigated to improve the stability of an AC transmission system or an AC/DC interconnected power system by installing the VSFC-SVC. Computer simulation results indicate that the voltage source type forced commutation static VAr compensator of even small rating can significantly improve the system stability.<
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