煤矿工业现场特殊的生产环境对电气设备的安全运行提出了更高的要求，尤其是以故障电弧为主的电气故障蕴含着巨大的安全隐患。传统的故障电弧监测和保护手段一般基于电流、电压、弧光等单一信号的提取和判断，虽然组合式监测方法已被提出，但往往实现复杂，成本较高。提出电流和弧光双判据的监测方法，通过光敏三极管阵列的传感措施，结合专家系统的评估方法，可以有效判断并定位高压开关柜中的故障电弧，及时切除故障，进而提高设备的工作寿命和安全可靠性，为煤矿电力系统的安全稳定运行提供保障。%The specific on-site environment of the mining industry field puts forward higher request to the safe operation of electrical equipment. Especially the arc-fault is one of the most important causes of disasters in distribution system. The traditional methods of the arc-fault detection and protection are based on the extraction and diagnosis of the single signals such as electric current, voltage, arc light, etc. Though the combined methodology has been proposed, it is difficult to implement and the cost is increased. On the basis, a double-criterion monitoring and protection method is proposed, which takes both electric current and arc light as the monitoring parameters. By use of the sensing measures of photosensitive dynatron matrix and expert system evaluation method, arc-fault in the high-voltage switch cabinet can be effectively judged and located and the fault can be cut timely, then the service life and safety and reliability of switch apparatus can be enhanced, ensuring the safe and stable operation of the mining power system.
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