感应电动机负荷参数对暂态电压稳定性的影响

以简单电力系统为研究对象,采用考虑机电暂态过程的三阶感应电动机负荷模型,通过时域仿真分析了输电线路电抗、负荷母线并联补偿容抗和感应电动机负荷参数的变化对电力系统暂态电压稳定极限切除时间的影响。分析结果表明:上述参数对电力系统暂态电压稳定性都有影响,其中,输电线路电抗、感应电动机负荷的比例、定子电抗、转子电阻、转子电抗、转子初始滑差等参数对电力系统暂态电压稳定性的影响较大。

Influence of Induction Motor Load Parameters on Power System Transient Voltage Stability

Taking simple power system as the subject investigated and using third-order model of induction motor load in which the electromechanical transient process is taken into account,the influence of the variations of transmission line reactance,shunt capacitive reactance on load bus and induction motor load parameters on critical clearing time of power system transient voltage stability is analyzed by time-domain simulation.The analysis results show that all of above-mentioned parameters have influence on power system transient stability,and the system transient stability is more easily influenced by transmission line reactance,the proportion of induction motor load in total loads,stator reactance,rotor resistance,rotor reactance and initial rotor slip.