Abstract Transmission network faults may not be located accurately in some abnormal conditions, such as traveling wave location device faults, startup failure and time recording error. In order to improve them, a novel traveling wave fault location method based on time linear dependence is proposed. The proximal point optimization algorithm (PPOA) is used to find the shortest transmission path of fault traveling wave. The linear fitting between the arrival time of the traveling wave head recorded by each substation and the transmission distance is made on the Cartesian coordinate plane, according to the characteristic that the length of the shortest path is directly proportional to the traveling wave transmission time. The information fusion for the traveling wave arrival time at each substation is achieved by linear regression analysis to correct the error information. The accurate fault location is obtained direct by coordinate information of the intersection of the fitted line and the coordinate axis. Finally, the traveling wave location system based on this method has been successfully tested in Hunan Power Grid. PSCAD simulation and field test results prove that the proposed method can effectively reduce the recording error in the arrival time of the fault traveling wave at each substation while improving the reliability and accuracy of fault location.

中文翻译：

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一种基于时间线性相关的输电网络行波故障定位新方法

摘要 在一些异常情况下，如行波定位设备故障、启动失败、时间记录错误等，可能无法准确定位输电网络故障。为了改进它们，提出了一种新的基于时间线性相关的行波故障定位方法。近点优化算法(PPOA)用于寻找故障行波的最短传输路径。根据最短路径长度与行波传输时间成正比的特点，在笛卡尔坐标平面上对各变电站记录的行波头到达时间与传输距离进行线性拟合。通过线性回归分析实现各变电站行波到达时间信息融合，修正误差信息。通过拟合线与坐标轴交点的坐标信息直接得到准确的故障定位。最后，基于该方法的行波定位系统已在湖南电网成功测试。PSCAD仿真和现场试验结果证明，该方法能够有效降低各变电站故障行波到达时间的记录误差，同时提高故障定位的可靠性和准确性。基于该方法的行波定位系统已在湖南电网成功测试。PSCAD仿真和现场试验结果证明，该方法能够有效降低各变电站故障行波到达时间的记录误差，同时提高故障定位的可靠性和准确性。基于该方法的行波定位系统已在湖南电网成功测试。PSCAD仿真和现场试验结果证明，该方法能够有效降低各变电站故障行波到达时间的记录误差，同时提高故障定位的可靠性和准确性。