Patent ID: 8018097
Filing Date: 2011-09-13
Classification: H01H,H02J,Y02B,Y02E,Y04S

Abstract:
1. A switching control system of circuit breaker, comprising: one or more switching control units of circuit breaker each of which inputs electrical quantity of at least one of power system voltage and main circuit current, state quantity of a circuit breaker, and at least one of an opening command signal and closing command signal of the circuit breaker, and performs control to cause the circuit breaker to open or close at a desired phase of the power system voltage or main circuit current; and a display operation unit, which is connected with the switching control unit of circuit breaker via a communication network and performs display operation to operate and monitor the operation and state of the switching control unit of circuit breaker, characterized in that: the switching control unit of circuit breaker comprises: a first area serving as switching control arithmetic operation means for causing the circuit breaker to open or close at a desired phase of the power system voltage or main circuit current; and a second area serving as communication arithmetic operation means for transmitting/receiving information from the display operation unit or transmitting information of the first area, via the communication network, wherein the switching control arithmetic operation of the first area can be executed independently from the communication arithmetic operation of the second area for the communication network by disposing information transfer means between the first area and the second area, and the switching control unit of circuit breaker further comprises: a third area serving as switching command control means, which is connected with the first area via a parallel transmission medium, and outputs a delay-controlled opening command signal or a delay-controlled closing command signal to the circuit breaker based on a switching control arithmetic operation result of the first area; a semiconductor switch circuit for circuit breaker switching control in which a plurality of semiconductor switches for circuit breaker switching control are connected, in order to output a delay-controlled opening command signal or a delay-controlled closing command signal to the circuit breaker in the third area; a bypass circuit which is connected in parallel with the semiconductor switch circuit for circuit breaker switching control; and a bypass circuit selector switch which prevents current from simultaneously flowing into the semiconductor switch circuit for circuit breaker switching control and the bypass circuit, wherein the bypass circuit selector switch selects the bypass circuit side when an abnormality is detected in the switching control unit of circuit breaker, or when a bypass circuit change-over command signal from the outside is input.