为了控制微生物繁殖对电厂循环冷却水系统造成的危害,研究了脉冲电源发生器与线圈绕组相连产生的脉冲磁场对循环水中异养菌的灭活影响,并对灭活关键因素进行了分析。实验结果表明,脉冲磁场对电厂循环冷却水中的异养菌有灭活作用;灭活率对频率和输出电压有选择性,并且随着作用时间和温度的升高而升高;在扫频范围100～1000 Hz、输出电压3 V、单次作用时间为15 s,温度45℃时,异养菌灭活率达到78.8%。 In order to control the harm of microbial propagation to the circulating cooling water system in power plant, the influence of pulse magnetic field generated by pulse generator and coil winding on inactivation of heterotrophic bacteria in circulating water was studied. The key factors of inactivation were also analyzed. The experimental results show that the pulsed magnetic field has an inactivation effect on the heterotrophic bacteria in the circulating cooling water of the power plant. The inactivation rate is selective to the frequency and the output voltage and increases with the increase of the action time and temperature. The inactivation rate of heterotrophic bacteria was 78.8% at 100 ~ 1000 Hz, the output voltage was 3 V, the single acting time was 15 s and the temperature was 45 ℃.