摘要
对国内外学者关于架空线-电力电缆混合线路故障定位的研究进行了梳理和综述。首先分析了混合线路故障定位存在的特殊问题,然后对架空-电缆混合输电线路故障定位方法的研究现状进行了总结。现有的混合线路故障定位方法有故障分析法、行波法、频率分析法以及智能法等。其中,故障分析法和行波法的准确性主要受混合线路参数不均一的影响;行波法因故障行波会在线缆连接点处发生复杂的折反射过程而导致反射波头难以识别;能否准确地确定故障暂态信号的固有频率值将直接影响频率法故障定位精度;智能法需对样本集进行离线训练,且需存储大量数据,应用起来较为困难。最后,对下一步需要开展的研究工作进行了展望。
The research on fault location of overhead line and power cable is reviewed.Firstly the special problems in fault location of hybrid transmission lines are analyzed,and then the research status of fault location methods for hybrid transmission lines is summarized.The existing methods of fault location for hybrid transmission lines mainly include fault analysis,traveling wave method,frequency analysis and intelligent method.Among them,the accuracy of fault analysis method and traveling wave method is mainly affected by the uneven parameters of the hybrid transmission line.For frequency method,whether the natural frequency of fault transient signal can be determined accurately directly affects the fault location accuracy of spectrum analysis.The offline training of the sample set and the storage of a large amount of data is required for the intelligent method.Finally,the future research work is prospected.
作者
张怿宁
ZHANG Yining(CSG EHV Power Transmission Company Maintenance&Test Center,Guangzhou 510663,China)
出处
《电力工程技术》
2020年第6期44-51,共8页
Electric Power Engineering Technology
基金
中国南方电网有限责任公司科技项目(CGYKJXM20180146)。
关键词
混合线路
故障定位
故障分析法
行波法
频率分析法
hybrid transmission lines
fault location
fault analysis method
travelling wave method
frequency analysis method
