基于参数修正的交叉互联电缆单相故障测距方法  

Single-phase fault location method for cross-connected cable based on parameter modification

作　　者：杨明嘉 夏成军[1,2] 池梓斌 陈晓儒 黄龙毅 YANG Mingjia;XIA Chengjun;CHI Zibin;CHEN Xiaoru;HUANG Longyi(School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China;Guangdong Provincial New Energy Power System Intelligent Operation and Control Enterprise Key Laboratory,Guangzhou 510663,China;Huizhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Huizhou 516001,China)

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]广东省新能源电力系统智能运行与控制企业重点实验室,广东广州510663 [3]广东电网有限责任公司惠州供电局,广东惠州516001

出　　处：《电力自动化设备》2024年第8期218-224,共7页Electric Power Automation Equipment

基　　金：国家重点研发计划项目(2022YFB2403500);中国南方电网有限责任公司科技项目(031300KK52200003)。

摘　　要：由于实际线路参数易受环境影响,基于暂态信息进行参数辨识的故障测距方法的计算结果可能无法代表真实线路参数,因此提出了基于参数修正的电缆故障测距方法。以交叉互联电缆为例,根据线芯与护层间电气耦合关系,建立了基于双π参数模型的电缆单相接地故障测距方程。基于模拟退火算法,利用电缆正常运行状态下的电气信息修正电缆线路参数。应用布谷鸟算法求解所建立的故障测距方程得到故障位置。基于PSCAD/EMTDC仿真软件搭建了电缆故障模型,分析了故障距离、过渡电阻、线路参数变化因素对所提方法的影响。仿真分析结果表明,所提方法在不同因素的影响下,均具有较高的准确度,对交叉互联电缆进行故障测距有一定的参考意义。Because the actual line parameters are easily affected by the environment,the calculation results of the fault location method based on transient information may not represent the real line parameters,so the cable fault location method based on parameter correction is proposed.Therefore,a cable fault location method based on parameter modification is proposed.Taking cross-connected cable as an example,based on the electrical coupling relationship between core and sheath,the single-phase grounding fault location equation of cable is established based on the doubleπparameter model.Based on simulated annealing algorithm,the electrical information under normal running state is used to correct cable line parameters.The fault location is obtained by using the cuckoo algorithm to solve the established fault location equation.A cable fault model is built based on PSCAD/EMTDC simulation software,and the influence of fault distance,transition resistance,line parameter variation on the proposed method is analyzed.The simulative results show that the proposed method has high accuracy under the influence of different factors,and has certain reference significance for fault location of cross-connected cables.

关 键 词：参数辨识 线路参数 参数修正 交叉互联电缆 故障测距 

分 类 号：TM713[电气工程—电力系统及自动化]