研究了配电网中在无信道条件下 ,故障段定位、隔离和供电恢复的新技术。当馈线发生永久性故障时 ,出线保护跳闸 ,随后各分段开关失压分闸。经过预定时延后 ,自出线开关起依序重合。在重合过程中 ,由于故障位置不同 ,出现故障电气量的时间也不同 ,因而利用出现故障量的时间差异就可准确判断故障线段。通过变电站出线开关与线路上分段开关的协调配合 ,实现消除暂时性故障 ,隔离永久性故障线段 ,恢复非故障线段的正常供电 ,并由变电站对故障线段定位上报 The new technology of fault location, isolation and power supply recovery under no-channel condition in distribution network is studied. When the feeder permanent fault occurs, the outlet protection trip, then the sub-switch sub-gate switch. After the scheduled delay, from the outlet switch in the order of coincidence. In the process of coincidence, due to the different fault locations, the time of the faulty electrical quantity is also different, so that the fault line segment can be accurately judged by the time difference of the fault amount. Through the coordination between substation outlet switch and line switch, the elimination of temporary failure, isolation of permanent fault line segment, restoration of normal power supply of non-fault line segment, and the substation to locate the fault line segment reported