Research on Mechanical Condition Detection Method for Load Switch Based on Motor Current Measurement

ZHAO Xiaohui; QIU Fangchi; SHI Hengtong; JIANG Chao; PENG Yi; YE Fengshu; XU Zhibin

doi:10.13296/j.1001-1609.hva.2020.06.047

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Research on Mechanical Condition Detection Method for Load Switch Based on Motor Current Measurement

更新时间：2025-04-26

- Research on Mechanical Condition Detection Method for Load Switch Based on Motor Current Measurement
- High VoltageApparatus Vol. 56, Issue 6, Pages: 324-328(2020)
- 作者机构：
  
  1. 深圳供电局有限公司
  2. 2. 缤谷电力科技(上海)有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.06.047
  CLC： TM564;TM933.1
- Published：2020
- 稿件说明：
移动端阅览
[1]赵晓晖,邱方驰,时亨通,江超,彭毅,叶枫舒,徐志斌.基于电机电流测量的负荷开关机械状态检测方法研究[J].高压电器,2020,56(06):324-328.

ZHAO Xiaohui, QIU Fangchi, SHI Hengtong, et al. Research on Mechanical Condition Detection Method for Load Switch Based on Motor Current Measurement[J]. High voltageapparatus, 2020, 56(6): 324-328.
[1]赵晓晖,邱方驰,时亨通,江超,彭毅,叶枫舒,徐志斌.基于电机电流测量的负荷开关机械状态检测方法研究[J].高压电器,2020,56(06):324-328. DOI： 10.13296/j.1001-1609.hva.2020.06.047.

ZHAO Xiaohui, QIU Fangchi, SHI Hengtong, et al. Research on Mechanical Condition Detection Method for Load Switch Based on Motor Current Measurement[J]. High voltageapparatus, 2020, 56(6): 324-328. DOI： 10.13296/j.1001-1609.hva.2020.06.047.

摘要

配网中大量使用负荷开关进行负载电流及故障电流的开断

由于负荷开关拒分拒合导致配网事故时有发生

文中研究了一种基于电机电流测量的负荷开关状态检测方法。在实验室采用现场常用的交流驱动电机负荷开关

通过对其传动齿轮箱添加沙粒及粘贴胶带等方式

构建了3种不同严重程度的负荷开关机械故障

对电机电流时域及频域信号进行了测量及分析。结果表明随着负荷开关机械故障严重程度增加

电机动作转矩增大

导致电机电流幅值增加、暂态持续时间增加、暂态过度时间减少及信号频域低频分量幅值增加

通过这4个参数可实现负荷开关机械故障严重程度的有效诊断。

Abstract

A large number of load switches are used in the distribution network to break the load current and faultcurrent. Due to the rejection of the load switch

the distribution network accident occurs. This paper studies a loadswitch state detection method based on motor current measurement. In the laboratory

the AC drive motor load switchcommonly used in the field is used. By adding sand and adhesive tape to the transmission gear box

three kinds of me-chanical failures of the load switch with different severity are constructed

and the time domain and frequency do-main signals of the motor current are measured and analyzed. The results show that as the severity of the mechanicalfailure of the load switch increases

the motor’s operating torque increases

resulting in an increase in the motor cur-rent amplitude

a increase in transient duration

a decrease in transient excess time

and an increase in the ampli-tude of the low frequency component in the frequency domain. The parameters can be used to effectively diagnose theseverity of the mechanical failure of the load switch.

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