行波技术在矿井供电系统中的应用

Application of traveling wave technology in mine power supply system

煤矿高压供配电系统的安全运行,是保证煤矿高产高效的必需条件之一。降低高低压电缆故障,利用在线监测手段实现实时监测、提前预警,对有效解决因电缆故障造成的供配电系统不能持续安全运行的问题是十分有效且必要的。通过分析电缆故障的成因,对比直流叠加法、温度监测法、局部放电法、可恢复故障法4种电缆故障监测技术的优缺点,最终确定采用基于行波技术的小电流接地选线技术和故障测距技术,设计建立高压电缆在线监测供电系统。该系统实现了高压电缆的绝缘状况监测、进行预警、故障定位、接地精准选线等功能,从而保证矿井的供电安全。

The safe operation of high-voltage power supply and distribution systems in coal mines is one of the necessary conditions to ensure high production and efficiency in coal mines.Therefore,reducing high and low voltage cable faults using online monitoring methods to achieve real-time monitoring and early warning is very effective and necessary to effectively solve the problem that the power supply and distribution system cannot continue to operate safely due to cable faults.This article analyzes and compares the advantages and disadvantages of four cable fault monitoring techniques:DC superposition method,temperature monitoring method,partial discharge method,and recoverable fault method by analyzing the causes of cable faults.Finally,the small current grounding line selection technology and fault location technology based on traveling wave technology are adopted to design and establish an online monitoring power supply system for high-voltage cables.The system realizes the insulation status of high-voltage cables,early warning,fault location,and accurate grounding line selection,thereby ensuring the safety of power supply.