电网设备状态智能校核及操作到位研判技术研究

Research on intelligent checking of power grid equipment status and research and judgment of operation in place

针对因电网设备运行状态较差,且实际操作与校核误差较大造成电网事故频率较高的问题,研究电网设备状态智能校核及操作到位研判技术。经过电网设备状态智能校核基本步骤后,将采集到的电网设备故障行波信号进行变分模态分解,比较典型故障行波固有频率与线路故障行波频率,判断故障发生的区间,计算故障精确距离,结合电网设备状态智能校核结果,完成电网设备操作到位研判。结果表明,电网设备状态校核结果符合实际情况,且故障距离误差较小,达到了预期目标。

Aiming at the problem of high frequency of power grid accidents caused by poor operation status of power grid equipment and large error in actual operation and check,the intelligent check and operation in place judgment technology of power grid equipment status is studied.After the basic steps of intelligent verification of power grid equipment status,the collected fault traveling wave signals of power grid equipment are decomposed by variational mode decomposition,the natural frequency of typical fault traveling wave and line fault traveling wave are compared,the fault interval is judged,and the accurate fault distance is calculated.Combined with the results of intelligent verification of power grid equipment status,the research and judgment of power grid equipment operation in place is completed.The results show that:the state check results of power grid equipment are in line with the actual situation,and the fault distance error is small,which achieves the expected goal.