现代行波故障测距原理及其在实测故障分析中的应用—D型原理  

Modern travelling wave-based fault location principle and its applications to actual fault analysis——type D principle

作　　者：陈平[1] 葛耀中[1] 徐丙垠[2] 李京[2] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049 [2]山东科汇电气股份有限公司,山东淄博255031

出　　处：《继电器》2004年第3期14-17,28,共5页Relay

摘　　要：输电线路上的实际暂态行波波头总是存在一定的上升时间,这使得故障初始行波浪涌到达线路两端测量点的时刻难以被准确标定,从而导致现有的双端行波故障测距方法存在不可避免的测距误差。在分析D型双端现代行波故障测距原理及其准确性的基础上提出了带补偿量的D型双端行波故障测距算法,该算法利用故障初始行波浪涌波头起始点所对应的绝对时刻与测距装置直接检测到该行波浪涌到达时绝对时刻之间的相对时间差来对测距误差进行补偿。实测故障分析表明,D型现代行波故障测距原理具有很高的可靠性,其绝对测距误差不超过1km。A rising time always exists in the wavefront of an actual transient travelling wave appearing on a transmission line. This makes it difficult to be tagged for the arrival time of the fault induced initial surge at both ends of one transmission line, resulting in unavoidable location error in the existing double-ended travelling wave-based fault location methods. Based on the analysis of type D double-ended modern travelling wave-based fault location principle and its accuracy, the compensated type D fault location algorithm is presented in this paper, which compensates the location error with the relative time difference between the absolute time corresponding to the start point of the fault caused initial surge and the detected arrival time of the fault caused initial surge by the fault locator at each end of the measured line. The actual fault analysis shows that the type D principle possesses very high reliability, and its absolute location error does not exceed 1 km.

关 键 词：输电线路 行波故障测距原理 实测故障分析 电力系统 全球定位系统 

分 类 号：TM711[电气工程—电力系统及自动化]