环型电网中备用电源自投系统的实现方案

以三亚电网部分110 kV电网为例，在具有多个电源点组成的环型电网中，在没有完善的通讯通道的情况下，提出了切实可行的解决方案。通过备自投系统中各装置相互配合，保证各变电站备自投装置都能可靠正确动作。各装置以采集本地信息为主，根据本地信息判断远方故障及装置的动作情况，而决定本装置应采取的动作措施。针对该电网中存在的大量小电源给备自投的正确动作带来问题，采取相角变化量作为进线电源跳闸的一条辅助判据。

A scheme for realization of spare power automatic-switching-device in a ring net

This paper proposes an automatic-switching solution for a ring network which includes two or more power sources and an incomplete communication network,by taking a part of 110 kV grid in Sanya as an example.Devices in some stations cooperate as a system to prove the correctness of all operations.The device judges remote system events and device operations through local data,so as to make corresponding operations.Meanwhile,a solution for small sources which disturbed the device is proposed as well.In some st...