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随着煤炭工业现代化的发展。煤矿的井型日趋增大,大型井有的年产400～500万吨,甚至更大,采掘工艺现代化要求采掘机械的功率日益增大,综合机械化采煤工作面的用电负荷达数千千瓦,全矿井的用电负荷也会增大到数万千瓦,为了满足井下用电需要,保证井下供电系统的经济合理运行,传统的采用6千伏电压下井已不能满足需要,应该考虑井下高压电压等级的升压,即将6千伏下井供电提高到10千伏下井供电。另一方面从国家规定的电压等级标准来看,目前我国执行的1983年国家经委颁发的《全国供用电规则》中规定高压供电电压的国家标准,额定电压为10KV、35KV……并规定除发电厂直配电压可采用3KV、6KV以外,其他等级的电压应逐步过渡到上列额定
With the development of coal industry modernization. The well type of coal mines is increasing day by day. Some large-scale wells have an annual output of 400-500 million tons or more. The modernization of the mining technology requires that the power of the mining machinery is increasing day by day. The power consumption of the mechanized coal mining face can reach several thousand kilowatts , The mine’s electricity load will increase to tens of thousands of kilowatts, in order to meet the underground electricity needs to ensure the economic operation of the underground power supply system, the traditional use of 6 kV voltage downhole can not meet the need, we should consider the underground high voltage The level of boost, about 6 kilovolt downhole power supply to 10 kV downhole power supply. On the other hand, according to the standard of voltage level stipulated by the state, the national standard for high-voltage supply voltage stipulated by the State Economic Commission for 1983, which is currently implemented in China, is rated at 10KV and 35KV. Power plant direct distribution voltage can be 3KV, 6KV, other levels of voltage should be gradually transition to the above rated