Since a large amount of reactive power consumption by the converter at the time of convertion

10 panel filters are installed in Xingren converter station for the purpose of reactive power compensation and harmonic filtering. In order to reduce the inrush current and transients

the special closing angle detection device POW is installed at the circuit breaker of panel filter during the control period of circuit breaker.In this paper

the closing operation principle and the control strategy of the POW are introduced

the fault causes of the POW are analyzed since operation from 2007 at Xingren converter station and the suggestions on operation and maintenance of the POW device are proposed.