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风机是矿山耗电量较大的设备,一般占全矿用电量15％左右。而主扇风机又是根据矿井中后期的供风量来选择的,投产初期因用风量较小、风机效率较低、电能浪费较大,这种状况要持续十年左右才能逐渐趋向平衡。兖州矿物局鲍店煤矿针对1986年投产以来存在的主扇风机低效率运行的问题,确定采用串级调速进行技术改造。串级调速的原理是在电机转子侧引入一个可调的附加电势,以改变附加电势来改变电机的转差功率,从而实现对电机的无级精确调速,同时将部分转差功率馈送到电网中去,达到节能的目的。串级调速装置于1990年底投入正
The fan is a large power plant equipment, generally account for about 15% of the total mine electricity consumption. The main fan is based on the mine in the late for the air supply to choose the early production due to the smaller amount of air used, the fan efficiency is low, large power waste, this situation will continue to ten years or so to gradually balance. Baozhou Coal Mine Yanzhou Bureau of mineral products for 1986 put into operation since the existence of the main fan of the inefficient operation of the issue to determine the use of cascade speed technical transformation. The principle of cascade speed regulation is to introduce an adjustable additional potential on the rotor side of the motor to change the additional potential to change the slip power of the motor so as to realize stepless and precise speed regulation of the motor while feeding part of the slip power to Go to the grid, to achieve the purpose of energy conservation. Cascade speed control device put into positive by the end of 1990