一种综合应用工频法和行波法的组合故障测距法  

New Fault Locating Method Based on the Traveling Wave Method Combining with Frequency Parameters Method

作　　者：李振兴[1] 田斌[1,2] 吴李群 王欣[1] 方绍晨[1] 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]国网恩施供电公司,湖北恩施445000

出　　处：《高压电器》2018年第2期240-245,251,共7页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(51477090);强电磁工程与新技术国家重点实验室(华中科技大学)开放基金资助项目(2016KF003)~~

摘　　要：为提高输电线路的故障测距性能,笔者综合分析了工频法和行波法二者之间的测距特点,并提出了一种综合应用工频量法和单端行波法的组合故障测距法。首先,基于输电线路的沿线电压幅值分布规律,利用切线交叉的工频测距原理,初步确定故障区域,接着,在此基础上用A型行波法精确地测出故障位置。通过引入行波测距避免工频测距后续的迭代计算,克服迭代不收敛或收敛至伪根的问题,提高测距精度;用工频初步测距,缩小行波波头辨识范围,提高行波测距可靠性。经仿真验证:所提组合法比工频法测距精度更高,比行波法的波头识别更加准确可靠。In order to improves the performance of ranging,by comprehensive analysis the characteristics of mainfrequency parameters fault location method and traveling wave method,this paper presents a new method whichtakes into account the characteristics and application of those two fault location methods. First,based on the voltagedistributon along the transmission line,according the tangent intersection of two voltage distribution curve to recog-nize the fault distance approximately,then obtained the accurate location results by A-type traveling-wave method.The proposed method by introducing traveling wave to evades the iterative calculation of frequency parameters faultlocation,keeps clear of false root or no convergence;use main frequency parameters method to narrow the search fur-ther,overcomes the difficulty in recognizing traveling-wave fronts. The simulation indicates that the proposed meth-od not only have higher precision than main frequency parameters method,but also have the ability to accuratelyidentify wave fronts.

关 键 词：输电线路 故障测距 行波测距法 工频测距法 组合测距法 

分 类 号：TM755[电气工程—电力系统及自动化]