摘要
厂用电源切换过程中,母线电压经历一个从衰减到恢复的过程,线路在切换中则会产生冲击电流,母线电压和线路电流的变化影响着厂用电源切换成功与否。本文基于厂用电源切换过程中母线电压和冲击电流的特点,计及感应电动机的动态稳定特性,将感应电动机群分组,然后将每一组的感应电动机群等值成一台感应电动机,等值前后的感应电动机具有相同的功率消耗。最后针对一个厂用电系统,利用EMTDC软件进行仿真研究。结果表明,等值后的简化模型对于3种厂用电切换方式均适用。
During plant power supply switching,the voltage on bus goes through decaying to recovering,while impulse current occurs in line during this process,which affects the switching of plant power supply.Based on the characteristic of the voltage on bus and inrush current,induction motors is divided into grouping by considering dynamic stability of induction motor.Then,each group is taken as one equivalent induction motor,both of which have same power loss.In the end,the simulation is carried out in EMTDC.The results show that equivalent simplified model is suitable for three kinds of modes of plant power supply switching.
出处
《现代电力》
2011年第3期51-56,共6页
Modern Electric Power
