分析区域备自投系统对故障范围识别的需求,提出了一种基于突变量方向原理的故障范围识别方案.方案中区域备自投系统各子站实时检测、发送本地测点的突变量方向值,方向值经短路电流展宽,主站同步接收、记录区内所有测点的突变量方向值,并保存一定时长的历史数据,当主站检测到跳闸失压时根据跳闸前各断路器测点的突变量方向值识别故障范围.该方案能够满足各种故障失压情况下的识别要求,原理简单可靠,不需增加额外设备及二次回路.%The requirement of areal automatic switchover system for fault range identification is analyzed and a scheme of fault range identification based on fault component direction is proposed.The slave stations of switchover system detect and transmit the fault component direction values of local measuring points in real time,which are spread by the short circuit currents and synchronously received by the master station for recording.The fault component direction values are stored for a certain period.When the master station detects the voltage-loss due to tripping,it identifies the fault range according to the fault component direction values of different circuit breakers.The proposed scheme can correctly identify the fault ranges of different voltage-loss conditions,simple and reliable,no additional equipment and secondary circuit required.
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