Research on Simulation of Switching Re-ignition Over-voltage of Capacitor Bank Based on Series Resistance Switch
In this paper,the issue of limiting the over-voltage and inrush current by way of series resistance switch during the switching of shunt capacitor bank in the capacitor bank compensation system of a 500kV EHV substation is studied.The influence of different series resistance values is analyzed through simulation,the recommended resistance values are proposed,and the limiting effects of using ordinary circuit breaker,phase-controlled circuit breaker and series resistance switch on over-voltage and over-current are compared.The results show that the series resistance switch can effectively reduce the probability of reignition and can,at the same time,reduce the over-voltage level after reignition.It is thought from the the economic and technical perspective that the series resistance switch has lower circuit breaker specifications,better economic performance and practicality.
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