风机变频改造及自动切换功能的应用

火电厂既是电能生产企业,也是耗能大户,要提高电厂综合效益,必须降低厂用电率和发电煤耗。电厂辅机出力为长期连续运行并常常处于变负荷运行状态,送、引风机作为主要辅机,采用控制风机挡板的开度来调节出力,而作为电动机消耗的能量变化则不大,造成较大能量损耗,直接影响到厂用电率。改为变频调节后,通过改变电机转速控制出力,实现调整需要,达到节电目的。

Reformation of variable frequency speed control technique on fan

Coal-fired power plant is enery producer,but also enery-consumption,to improve the overall efficiency of power plants must reduce the power consumption rate and coal consumption.Auxiliary power output for long-term continwous operation are often runming at variable load.The large-capacity and high-voltage frequency control technology has been widely used in the energy saving field.The successful application instance of the variable frequency speed control technique on air fan and draft fan was discussed,the energy-saving effectiveness of variable frequency reformation were analyzed.After retroformation,the operation of the above system is normal,the energy-saving effectiveness is better.