电网络和矩阵理论在变电所接地故障诊断中的应用

2021-07-17 20:43:16王海滨
河南科技 2021年7期

王海滨

摘 要:为解决传统变电所接地故障诊断方法中诊断幅值低的问题,基于电网络和矩阵理论设计变电所接地故障诊断方法。基于电网络,采集、处理变电所接地故障数据,提取离散型变电所接地故障信号,计算故障信号特征能量;基于矩阵理论,建立故障诊断矩阵,上传故障诊断数据,实现故障诊断定位。实例分析结果表明,本文设计的故障诊断方法能解决传统变电所接地故障诊断方法中诊断幅值低的问题。

关键词:电网络:矩阵理论:接地故障

中图分类号:TM862文献标识码:A文章编号:1003-5168(2021)07-0096-03

Application of Electrical Network and Matrix Theory in Substation Grounding Fault Diagnosis

WANG Haibin

(The Operation Management Co., Ltd of China Railway Construction Electrification Bureau Group,Xiangyang Hubei 441100)

Abstract: In order to solve the problem of low diagnosis amplitude in traditional substation grounding fault diagnosis methods, a substation grounding fault diagnosis method was designed based on electrical network and matrix theory. Based on the electric network, the grounding fault data of substation is collected and processed, the discrete grounding fault signal of substation is extracted, and the characteristic energy of fault signal is calculated; Based on the matrix theory, the fault diagnosis matrix is established, the fault diagnosis data is uploaded, and the fault diagnosis location is realized. The results show that the fault diagnosis method designed in this paper can solve the problem of low diagnosis amplitude in traditional substation grounding fault diagnosis methods.

Keywords: electric network;matrix theory;ground fault

過电流保护会造成变电所接地故障[1]。为避免接地故障影响变电所的稳定运行,需要加强故障诊断。我国以往主要通过小波分析,利用高性能的图像,实现变电所接地故障诊断。但该方法在实际应用中存在故障诊断幅值低的问题,导致故障诊断精度低[2]。电网络指的是由若干元器件共同组成的电气网络,能够有效采集、处理以及传输数据。因此,将电网络应用于变电所接地故障诊断中尤为必要。此外,矩阵理论中包含数据特征值与特征向量的线性变换,能够导出算子,在数据观测中起到重要作用。基于此,本文将电网络和矩阵理论同时应用于变电所接地故障诊断中,从根本上提高变电所接地故障诊断幅值。

1 变电所接地故障诊断方法

1.1 基于电网络采集、处理变电所接地故障数据

在变电所接地故障诊断中,首先使用数据采集装置,对变电所接地发生故障的单元进行数据排查,从而获取故障信息。……

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