Switching controller and switching control system for circuit breaker

Abstract

The MPU for switching control arithmetic operation 210 in the switching control arithmetic operation unit 200 performs arithmetic operations to determine a predetermined delay time (synchronous delay count value D) for each circuit breaker 1100. The synchronous delay count value is sent to each switching command control unit 400 of the corresponding circuit breaker. The hardware counter 20 of the switching command output control unit 450, for the switching command signal received from the superordinate device 2000, counts the synchronous delay count value D, which is the delay time. When the semiconductor switch of the switching command output unit 10 turns ON after counting completes, the switching command signal (circuit breaker drive current) after the synchronous switching control is output to the circuit breaker drive coil 1110 of the circuit breaker 1100. A switching controller for circuit breaker and a switching control system for circuit breaker are provided, which can implement cost saving and space saving, even if switching of a circuit breaker in a lower branch system, such as a power distribution system, is controlled.

1 . A switching controller for circuit breaker, to which at least one of electrical quantities of the system voltage and main circuit current, state quantity of each circuit breaker, and at least one of an opening command signal and closing command signal for each circuit breaker, are input, and which, at a desired phase of the system voltage or main circuit current, controls the opening command signal to open the circuit breaker, or controls the closing command signal to close the circuit breaker, comprising:
 a first area which performs arithmetic operations to determine an individual synchronous closing delay time for the closing command signal, or performs arithmetic operations to determine an individual synchronous opening delay time for the opening command signal when the opening/closing command signal of each circuit breaker has been input; and   a second area which controls delay of the closing command signal based on the synchronous closing delay time, or controls delay of the opening command signal based on the synchronous opening delay time when the opening/closing command signal has been determined by the first area, and outputs each of these delay-controlled opening/closing command signals to each corresponding circuit breaker.   
   
   
       2 . The switching controller for circuit breaker according to  claim 1 , wherein:
 the second area has one or more switching command control units which controls delay of the opening command signal or closing command signal, and the number of the switching command control units is the same as that of the circuit breakers to be controlled.   
   
   
       3 . The switching controller for circuit breaker according to  claim 1 , wherein:
 the first area and second area are connected via a parallel transmission medium.   
   
   
       4 . The switching controller for circuit breaker according to  claim 1 , comprising:
 a third area, which is a communication unit for communicating with a display operation device which displays and stores synchronous switching control related data including main circuit current waveforms and system voltage waveforms before and after the switching operation of the circuit breaker, stroke waveforms of the circuit breaker, switching operation time of the circuit breaker and state quantity of the circuit breaker.   
   
   
       5 . The switching controller for circuit breaker according to  claim 4 , wherein:
 the third area has a data storage unit in which the synchronous switching control related data is stored, and the data storage unit is divided into a plurality of parts according to the number of the circuit breakers.   
   
   
       6 . The switching controller for circuit breaker according to  claim 1 , wherein:
 the circuit breakers are non-phase segregated operation-type circuit breakers.   
   
   
       7 . A switching control system for circuit breaker, which is configured by individually connecting a plurality of the switching controllers for circuit breaker described in  claim 4 , with the display operation device via a communication network. 
   
   
       8 . The switching control system for circuit breaker according to  claim 7 , wherein:
 a wireless communication unit is provided in at least one of the switching controller for circuit breaker and the display operation device, and   a part or all of the communication network is a wireless communication network.   
   
   
       9 . The switching control system for circuit breaker according to  claim 7 , wherein:
 the third area has a web server which accumulates synchronous switching control related data, and   the display operation device has a web browser which displays the synchronous switching control related data when the data has been acquired via the communication network.