综合零序电流信号分量的单相接地故障选线方法
Single-phase grounding fault line selection method combining zero sequence current signal components
赵森豪 1耿蒲龙2
作者信息
- 1. 太原理工大学 煤矿电气设备与智能控制山西省重点实验室, 山西 太原 030024
- 2. 太原理工大学 煤矿电气设备与智能控制山西省重点实验室, 山西 太原 030024;晋能控股装备制造集团技术中心, 山西 晋城 048006
- 折叠
摘要
文章提出了一种优化变分模态分解(VMD)参数与综合零序电流信号分量的选线方法,旨在解决目前矿井经消弧线圈接地供电系统发生单相接地故障时,存在的故障信号特征提取困难、噪声信号影响严重等问题.该方法利用鲸鱼优化VMD参数对零序电流信号进行分解,并根据非工频分量能量、工频分量极性和波形相关性的多重判据进行故障线路判别.利用RTDS/RSCAD搭建矿井供电系统模型,仿真测试了不同的故障情况,包括不同故障线路的故障接地电阻、故障初始相位角、故障点位置.结果显示,无论故障条件如何,该方法都有更加准确和可靠的选线结果.
Abstract
In order to address the problems that arise when a single-phase ground fault occurs in the current mine grounding power supply system,we propose a line selection method based on parameter optimization variational mode decomposition(VMD)combined with the thorough component of zero-sequence current.These faults are caused by the difficulty of extracting signal features from the arc suppression coil and the significant influence of noise signal.In this method,the whale optimized VMD is used to decompose the zero-sequence current signal,and the fault line is identified according to multiple criteria of non-power frequency component signal energy,power frequency component signal polarity and waveform correlation.RTDS/RSCAD is used to build a mine power supply system model,and different fault conditions are simulated and tested,including fault grounding resistance,fault initial phase angle,and fault point location of different fault lines.The results show that this method has a more intuitive line selection effect under the premise of ensuring accuracy and reliability,regardless of the fault conditions.
关键词
单相接地故障/变分模态分解/鲸鱼优化算法/综合信号分量/波形相关性Key words
single phase ground fault/VMD/whale optimization algorithm/composite signal component/waveform correlation引用本文复制引用
基金项目
山西省"1331工程"提质增效建设项目(晋教科[2021]4号)
出版年
2024
NETL
NSTL
万方数据