基于ZM综合负荷模型地区电网静态电压稳定分析

提出一种适用于地区电网静态电压稳定分析计算的改进奇异值分解法.该方法在形成雅可比矩阵时,考虑了ZM综合负荷模型的稳态特性对电压稳定的影响,通过对扩展雅可比矩阵进行奇异值分析,得到弱稳定节点和静稳裕度.通过算例仿真验证了该方法的有效性和合理性,算例结果表明考虑动态设备的稳态特性后的分析结果更能反映电网的真实状态,从而有利于电压稳定控制决策.

Analysis of Steady-state Voltage Stability of Local Power Grid Based on ZM Composite Load Model

An improved singular value decomposition method for analyzing steady-state voltage stability of local power grid is proposed in the paper. While forming the Jacobian matrix, and considering the influence of ZM composite load model's stability characteristics on the steady-state voltage stability, the method achieves the weak stable nodes and static stability margin through singular value analysis of extended Jacobian matrix. The efficiency and rationality of the method are evaluated by a test system simulation, showing that to take into account the steady-state characteristics of the dynamic device can well reflect the true state of the grid, and thus is favorable for voltage stability control decision-making.