继电保护出口回路自动切换装置的研制

Development of automatic switching device for the outlet circuit of relay protection

由于继电保护培训中心多套保护装置仅配备一台断路器,做开关传动试验时需要改接保护装置出口回路。在此背景下,设计一种自动切换出口回路的装置,以防止不同操作电源的互串。首先,切换装置内部的PIC单片机判断需投入的操作电源,然后切除已接入的操作电源并投入需要的操作电源,通过闭锁功能保证只有一回操作电源在连接状态。实际应用效果验证了该装置可以快速自动切换出口回路并防止互串。

Since the relay protection training center is only equipped with one circuit breaker for multiple sets of protection devices, it is necessary to change the outlet circuit of the protection device when conducting the switch drive test. Under this background, a device is designed in order to switch the outlet circuit automatically and it prevents the intersection of different operating power supplies. Firstly, the PIC microcontroller installed in the device determines the operation power supply to be put in. Then, the connected operation power is cut and the required operation power supply is to be connected. The latch function ensures that only one operation power supply is in the connection state. It is verified in practice application that the device can quickly and automatically switch the outlet circuit and prevent the intersection.