| 引用本文: | 位韶康,陈平,姜映辉.一种不受波速影响的单端行波测距方法[J].电力系统保护与控制,2013,41(13):76-81. |
| WEI Shao-kang,CHEN Ping,JIANG Ying-hui.A single-ended traveling wave ranging method avoiding wave speed influence[J].Power System Protection and Control,2013,41(13):76-81 |
|
| 摘要: |
| 分析了架空线路发生故障后行波的传播过程以及行波折、反射原理。针对双端测距的不足提出了一种基于分析单端行波前三个波头的故障测距新方法。首先，在线路两端安装实时通信装置，根据两端的第一个波头的到达时间先后识别故障点离两端母线哪一端更近，然后利用单端行波测距方法记录M端母线接收到的前三个波头到达的绝对时间，确定故障点类型，经过数学变形消去会对测距结果产生误差的主要影响因素行波传播速度 ,求出故障点位置。所提方法避开了单端行波测距中区分第二个波头性质的难题，消除了双端原理测距中线路两侧准确时间同步问题对测距精度的 |
| 关键词: 架空线路 行波 故障定位 单端测距原理 双端测距原理 |
| DOI：10.7667/j.issn.1674-3415.2013.13.014 |
| 分类号: |
| 基金项目: |
|
| A single-ended traveling wave ranging method avoiding wave speed influence |
|
WEI Shao-kang,CHEN Ping,JIANG Ying-hui
|
| Abstract: |
| The propagation and the principle of refraction and reflection of traveling waves after fault at overhead lines are analyzed. In respect to the lack of double-ended ranging, this paper proposes a new fault location method based on the analysis of the first three waves’ head of the single-ended traveling wave. First, the real-time communication device is installed at both ends of the line, according to the arrival time of the first wave’s head to determine which end of the bus the fault point approaches to. Then the absolute time of the first three waves’ head arrival received by M-end bus is recorded by using single-ended traveling wave ranging method and the types of fault point are determined. Mathematical deformation is used to eliminate wave velocity which will produce errors to fault location results and fault point location is obtained. The method proposed avoids the problem of distinguishing the nature of the second wave head in single-ended traveling wave ranging, eliminates the influence of accurate time synchronization at both sides of line on ranging accuracy of double-ended ranging principle, and eliminates the wave velocity v, thus improving the accuracy of fault location. ATP-EMTP simulation results show that the proposed method is feasible, and its fault location accuracy is higher. |
| Key words: overhead lines traveling wave fault location single-ended ranging principle double-ended ranging principle |
