煤矿高压电缆绝缘在线监测研究

详细信息

Research of online monitoring of high voltage cable insulation degradation of coal mine

1.
School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, China
2.
Yangzhou Maintenance Branch, Jiangsu Electric Power Company, Yangzhou 225000, Chi

摘要: 分析了煤矿高压电缆出现水树枝老化、电树枝老化和整体均匀劣化下的电气特性，采用小波消噪技术和基于正交分解的信号分离技术进行接地线电流噪声处理，通过接地线电流的变化趋势和设定阈值来判断电缆是否发生绝缘劣化。Matlab仿真结果表明，研究各条线路的绝缘参数变化与相应接地线电流不同分量的关系，可实现对煤矿高压电缆绝缘在线监测特征信号的提取。
- 煤矿高压电缆 /
- 电缆绝缘 /
- 接地线电流 /
- 在线监测 /
- 小波消噪
Abstract: Electrical characteristics of coal mine high voltage cable was analyzed under situation of water tree aging, electrical tree aging and overall uniform deterioration. Wavelet noise canceling technology and signal separation technology based on orthogonal decomposition were used for noise signal processing of grounding line current. Changing trends and set threshold of grounding line current were used to determine whether cable insulation deterioration occurs. Matlab simulation results show that researching relationship between insulation parameters changing of each line and different components of corresponding grounding-line current enables extraction of characteristic signal of online monitoring of high voltage cable insulation degradation of coal mine.
- coal mine high voltage cable /
- cable insulation /
- grounding line current /
- online monitoring /
- wavelet denoising