The opening and closing polar control method in the phase control breech operating mechanism and the phase control breech operating mechanism

摘要

Through the opening and closing equipment for electric power such as breaker, control the occurrence of the transient magnetization rush current in the transformer which is connected to electric power system. Residual magnetic flux transaction of operation section 50a has with the residual magnetic flux sensing station 53 which detects the residual magnetic flux which remains behind in the breaker opening and closing state identification section 51 which detects the opening and closing state of voltage rate of change sensing station 52a and the breaker which detect the transformer voltage rate of change of each every phase and transformer 30. Residual magnetic flux sensing station 53 decides, when breaker 10 is a contact parting state, whether in the period when it is identified, no residual magnetic flux re-is calculated on the basis of the transformer voltage rate of change which is detected, when deciding, that recalculate of residual magnetic flux is needed, as recalculate residual magnetic flux, recalculate it sets the residual magnetic flux which does as new residual magnetic flux.