【摘要】 根据Ｖ～ａ曲线的概念，给出了负荷节点电压，发电机无功输出以及节点相角与负荷增长率的关系，使静态电压稳定判据可靠且实用．考虑到电压问题的非线性，推出了状态变化量修正公式，使逐次线性迭代法求静稳极限的结果更趋近于系统真实解．在多个ＩＥＥＥ推荐电网以及实际电力系统中的计算表明，本方法计算速度快，计算结果准确，适合于电网的实时应用．更多还原

【Abstract】 The relation between state variables (load bus voltages, reactive power output of generators and bus angles) and load increment ratio is determined and a more reliable creterion for static voltage stability is obtained according to the concept of V～α Curve. A modified formula of state variables is derived because voltages vary nonlinearly and thus the computed results of voltage stability index appoach to real values closely. Simulations on several IEEE testing systems and a real power system in South China show that the algorithm presented in the paper can save CPU time, provide an accurate index and be applicable to real power systems.更多还原