电力系统及其自动化学报2018，Vol.30Issue(4)：7-15,29,10.DOI:10.3969/j.issn.1003-8930.2018.04.002
直流频变电缆参数测量与故障定位原理
Measurement Method of Frequency-dependant Parameters for DC Cable and Fault Location Principle
摘要
Abstract
The research on frequency-dependent parameters has always been one of the keys to solving cable problems. In this paper,a parameter measurement method is proposed,which can be used in actual projects.By measuring the open-circuit and short-circuit impedances in the corresponding sequences at different frequencies,the distribution of parameters in frequency domain are calculated,and the accurate cable parameters that vary with frequency are ob?tained.Accordingly,a fault location method for VSC-HVDC cables is proposed by combining wavelet transform meth?od,which is suitable for the frequency-dependent parameter model.By using this model,the locations can be calculat?ed using double terminal voltage and current from both ends respectively.The proposed method changes the traditional idea that wavelet transform can only be used to identify the travelling wave head,and by applying the wavelet transform to the fault location based on the calculation of impedances,it can improve the location precision effectively.关键词
频变参数模型/故障定位/参数测量/小波变换Key words
frequency-dependent model/fault location/parameter measurement/wavelet transform分类
信息技术与安全科学引用本文复制引用
高博,张超..直流频变电缆参数测量与故障定位原理[J].电力系统及其自动化学报,2018,30(4):7-15,29,10.基金项目
国家自然科学基金资助项目(51577129,51207103) （51577129,51207103）
国家重点研发计划资助项目(2016YFB0900900) （2016YFB0900900）
天津市自然科学基金资助项目(14JCYBJC21000) （14JCYBJC21000）
