中国电机工程学报2023，Vol.43Issue(23)：9098-9113,16.DOI:10.13334/j.0258-8013.pcsee.221891
暂态特征模量时频分析的电缆型配电网单相接地故障区段定位
Single-phase Grounding Fault Section Location of the Distribution Cable Networks Based on the Time-frequency Analysis of the Transient Featured Moduli
摘要
Abstract
The mutual couplings between the conductors and sheath of the distribution cable are complex.After a single-phase grounding fault occurs in the cable,the steady features are not obvious and the transient features are variable in complex conditions(high-impedance faults,arcs,etc.),making fault cable location difficult in a complex distribution network.Aiming at the structural features of the typical distribution cable,the feasibility of decoupling the signals in time domains is firstly verified.The general method for calculating the phase-mode transformation matrices is proposed.Then,according to the states of the moduli before and after the fault,the featured moduli,effectively reflecting the fault,are selected.Finally,considering the topology of the distribution cable network and measurement deployment,the fault section location criterion based on the space-measurement matrix is created by analyzing the amplitude distribution of the frequency component in the moduli and the polarity coefficients of the current moduli at the branch node.A 10kV distribution cable fault simulation model is created by using PSCAD/EMTDC.The calculation results of the typical cases demonstrate that the faults can be accurately located by the proposed method under different conditions,which indicates its advantages over the current methods.关键词
相模变换/特征模量/时频分析/故障定位/配电电缆Key words
phase-mode transformation/featured moduli/time-frequency analysis/fault location/distribution cable分类
信息技术与安全科学引用本文复制引用
梁睿,彭楠,张政一,李晶昊,孔令昌,王全金..暂态特征模量时频分析的电缆型配电网单相接地故障区段定位[J].中国电机工程学报,2023,43(23):9098-9113,16.基金项目
国家自然科学基金(面上项目)(52077215) （面上项目）
江苏省自然科学基金(面上项目)(BK20201348).Project Supported by National Natural Science Foundation of China(General Program)(52077215) （面上项目）
Natural Science Foundation of Jiangsu Province(General Program)(BK20201348). （General Program）
