电力系统自动化2012，Vol.36Issue(23)：93-97,125,6.
基于频域参数识别方法的配电网单相接地故障选线
Fault Line Selection in Distribution Networks Based on Parameter Identification Method in Frequency Domain
摘要
Abstract
The distribution networks in China are mostly the ungrounded neutral system or the resonant grounded system.Timely selection of the fault line is of great significance to power systems after fault.This paper proposes a parameter identification method in frequency-domain to solve this problem.By using the matrix pencil method to extract frequency-points and their information in zero-sequence voltage and zero-sequence current,spectral leakage in discrete Fourier transformation is avoid.With the estimated frequency points,an equation is established in frequency-domain,which will help to calculate the capacitance value and further identify the fault line.Compared with the time-domain method,this method requires a lower sampling rate and has higher accuracy.Moreover,the frequency-band in this new method is wider than the traditional frequency-band of the first capacitive frequency band filtering method.In theory,a filtering process is not needed in this method.Verified by simulation in ATP-EMTP and data from real time digital simulator(RTDS),the new method is quite effective in fault line selection with an ability to overcome transition resistor and is free from the impact of arc-suppression.关键词
配电网/故障选线/矩阵束算法/最小二乘估计/模型参数识别Key words
distribution network/fault line selection/matrix pencil algorithm/least squares estimate/model parameter identification分类
信息技术与安全科学引用本文复制引用
索南加乐,李宗朋,王莉,焦在滨,马超..基于频域参数识别方法的配电网单相接地故障选线[J].电力系统自动化,2012,36(23):93-97,125,6.基金项目
国家自然科学基金资助项目 （）
国家重点基础研究发展计划（973计划）资助项目 （）
