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针对电力用户在快切装置应用过程中遇到的实际问题,本文建立了电动机负荷PSCAD/EMTDC仿真模型,对比不同条件下电源切换的效果,对影响快速切换成功率的主要因素进行了研究,发现出馈线支路负载的动静态特性、电动机机械负载特性、快切装置动作时间,以及投入备用电源时母线残压与备用电源之间压差、相位差会对切换效果产生显著影响。
Aiming at the practical problems encountered by power users in the application of fast cutting device, a simulation model of PSCAD / EMTDC for motor load is established in this paper. By comparing the effects of power switching under different conditions, the main factors affecting the success rate of fast switching are studied. The dynamic and static characteristics of the feeder branch load, the mechanical load characteristics of the motor, the operating time of the quick cutting device, and the voltage difference between the residual voltage of the busbar and the standby power when the backup power supply is put into use, the phase difference will have a significant impact on the switching effect.