防止异常反送电装置的关键技术研究

Study on the key technology of the devices to prevent the abnormal reversed feeding

本装置将分别采集公共电网侧和自备电源侧电压互感器和电流互感器上的交流信号,并通过装置内部处理器的计算,得出两侧有功功率的正负,综合根据两侧功率方向和装置上预设的工作方式以及是否反送电开关状态量来判断是否发生了异常反向送电,最后根据判断结果控制柱上开关的通断。

The device collected individually the ahemative signal on the voltage transformer and current transformer on the public power grid side and self-supply power source side. By computing of the inside processor, the positive and negative situation of real power can be detected. Through analyzing the power direction of the two sides, the setting working mode, and the binary state value for the reversed feeding, the abnormal reversed feeding can be detected. Finally, the switches were controlled according to the judgment result.