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目前,我国煤矿正朝着大型化、生产机械化、控制监测自动化等方面发展。同时,国家对节能提出了更高的要求,颁发了《企业节约能源管理升级暂行规定》,把节能工作作为考核企业上等级的重要条件,对煤矿供电提出了新的要求。煤矿井下功率因数一般在0.5～0.65之间。这主要是井下大量使用异步电机,负荷率又不高所致。另外,供电距离、设备容量
At present, China’s coal mines are moving toward large-scale production mechanization, control and monitoring automation development. At the same time, the state put forward higher requirements on energy conservation and issued the Interim Provisions on Enterprise Energy Saving Management Upgrade, taking energy-saving work as an important condition for assessing enterprises’ upper grades and putting forward new requirements on coal mine power supply. Coal mine power factor is generally between 0.5 ~ 0.65. This is mainly a large number of underground use of asynchronous motors, the load factor is not high. In addition, the power supply distance, equipment capacity