基于灰色综合关联度的柔性直流配电网故障定位  

FAULT LOCATION BASED ON COMPREHENSIVE GREY RELATIONAL DEGREE FOR FLEXIBLE DC DISTRIBUTION NETWORK

作　　者：徐岩 胡紫琪 董浩然 马天祥 Xu Yan;Hu Ziqi;Dong Haoran;Ma Tianxiang(State Key Laboratory of New Energy and Electric Power Systems(North China Electric Power University),Baoding 071003,China;State Grid Hebei Electric Power Co.,Ltd.,Electric Power Research Institute,Shijiazhuang 050021,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),保定071003 [2]国网河北省电力有限公司电力科学研究院,石家庄050021

出　　处：《太阳能学报》2023年第4期324-331,共8页Acta Energiae Solaris Sinica

基　　金：河北省重点研发计划(20314301D);国家电网有限公司科技项目(kj2021-003)。

摘　　要：为解决柔性直流配电网对故障定位的准确性和快速性要求高的问题,提出一种基于灰色综合关联度的柔性直流配电网故障定位方法。利用灰色综合关联度分析线路首末线模行波差动电流波形的相似性,通过求解最佳时移来实现故障定位。在Matlab/Simulink中搭建六端柔性直流配电网模型进行仿真验证,结果表明该方法可完成全线各类故障的迅速准确定位,并有一定的抗过渡电阻能力,适用于采样频率较低的情况,具有较高的可靠性。In order to solve the problem of high accuracy and rapidity requirements for fault location in flexible DC distribution networks,a fault location method for flexible DC distribution network based on grey relational degree is proposed.The similarity of the first and last line mode traveling wave differential current waveforms is analyzed using grey relational degree,and the fault location is achieved by solving the optimal time shift.Finally,a six-terminal flexible DC distribution network model is built in Matlab/Simulink for simulation and validation,showing that the method can complete the rapid and accurate location of all types of faults on the whole line,and has a certain resistance to transition resistance,suitable for the case of low sampling frequency,and has high reliability.

关 键 词：直流配电网 故障定位 相关性 灰色关联度 行波差动电流 

分 类 号：TM73[电气工程—电力系统及自动化]