| 基于激光测距及多特征合判的输配电线外力破坏故障定位方法 |
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| 引用本文：侯元红,尹延麒,崔桂兴,万鹏,李博.基于激光测距及多特征合判的输配电线外力破坏故障定位方法[J].电网与清洁能源,2021,37(7):73~78 |
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| 基金项目:国家电网有限公司科技项目（5228041900RQ） |
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| 中文摘要:为了提升输电线故障维修的效率，减少因电路故障带来的经济损失，提出一种基于激光测距及多特征合判的输电线故障定位方法。首先，利用信号频谱将各频率点上的能量分布作为概率分布以进行信息熵统计，设计相应的能量门限以防止噪声干扰，通过多特征合判手段提取故障信号；然后，根据Ｔ型故障点的架空线结构来分析故障区域段特性，采用双端行波测距技术来确定具体故障位置；最后，通过分析激光测距检测的工作流程，将其搭载于现场终端内测量故障点与现场终端的距离，修正坐标位置，并通过坐标系转换，将2个空间直角坐标系进行基准变换，得到输电线路故障的具体位置。实验结果表明，所提方法可以大幅度提高输电线故障定位的精准度，加快输电线故障点的修复速率，具有很强的实用价值。 |
| 中文关键词:激光测距 多特征合判 故障定位 输电线路 |
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| A Fault Location Method of Transmission Line Based on Laser Ranging and Multi-Feature Joint Judgement |
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| Abstract:In order to improve the efficiency of transmission line fault maintenance and reduce the economic loss caused by circuit faults， a transmission line fault location method based on laser ranging and multi-feature joint judgment is proposed. First， the signal spectrum is used to take the energy distribution at each frequency point as the probability distribution for information entropy statistics， and the corresponding energy threshold is designed to prevent noise interference， and the fault signal is extracted by the multi-feature joint judgment method； the characteristics of the fault area is analyzed according to the overhead line construction of the T-shaped fault， and the double-ended traveling wave ranging technology is obtained to determine the specific fault location； through the analysis of the laser ranging detection workflow， it is mounted into the field terminal to measure the distance between the fault point and the field terminal， and correct the coordinate position. Through the coordinate system conversion， the two spatial rectangular coordinate systems are subjected to the reference transformation， and the specific location of the transmission line fault is obtained. The experimental results show that the proposed method can greatly improve the accuracy of transmission line fault location and speed up the repair efficiency of transmission line fault points， which has strong practical value. |
| keywords:laser ranging multi feature judgment fault location transmission line |
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