包含负荷及系统动态的电力系统电压稳定仿真

SIMULATION OF POWER SYSTEM VOLTAGE STABILITY INCLUDINGLOAD AND SYSTEM DYNAMICS

本文提出一种对系统电压稳定进行详细仿真的方法、此方法考虑了系统及负荷动态的影响，诸如系统干扰、电动机力矩及滑差、变压器抽头的的换接、坚持Ｐ、Ｑ需要的负荷、抑制励磁以防止发电机过热、以及有电压偏移负反馈的ＳＶＣ等。由于是高阶次的非线性全模，作者采用一种既精确又快速的方法来进行积分，还应用了一种毋需经过高阶次矩阵求逆就可便捷地求解高阶次Ｊａｃｏｂｉ矩阵的方法。作者选用具有大系统特性的九机系统作为研究对象，并给出了研究结果。

This paper presents methods and resultsof comprehensive simulation of the voltage stability of apower system. System and load dynamics like systemdisturbance, motor slip and torque, transformer tapchanging, persistent PQ demanding lcad, overheat pro-tection with excitation reduction and SVC with voltagedeviation feedback are considered. Being high orderand nonlinear, a fast and accurate method is devised forthe integration and an efficient mathod developed forthe solution of high order Jacobian equation withoutlarge inversion. A nine machines system whichhas the nature of a large power system is chosen as anexample of the stuty system.