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煤矿供电系统的安全运行对煤矿的安全生产具有十分重要的意义。本文将粗糙集理论中的决策表约简方法用于煤矿供电系统故障诊断中,此方法是把一次设备中得到的电流电压测量信号作为对故障分类的条件属性集,通过构建变电站故障决策表,分析在发生短路或单项接地故障时,对故障进行判断。将其应用于西山煤电集团杜儿坪110 kV变电站的短路故障诊断中,实现了正确的诊断,可直接地反映出诊断意见,为电力调度人员的日常工作提供了帮助,具有较高的实用价值。
The safe operation of coal mine power supply system is of great significance to the safe production of coal mines. In this paper, the method of decision table reduction in rough set theory is applied to the fault diagnosis of coal mine power supply system. This method takes the current and voltage measurement signals obtained from primary equipment as the condition attribute set for fault classification. By constructing the fault decision table of substation, Analysis in the event of a short circuit or single ground fault, the fault is judged. Applying it to short-circuit fault diagnosis of 110kV substation of Du’erping in Xishan Coal and Electricity Group, the correct diagnosis can be realized, which can directly reflect the diagnosis opinion and help the daily work of power dispatcher, which is of high practicality value.