These algebraic equations keep the form of power system stability DAE model unchanged, also they need neither to inverse matrix nor compute the determinant, in the meantime they have the same advantage of rapid convergent speed as the direct method.

• 该方程保留了电力系统稳定微分-代数模型的形式不变,也未涉及到矩阵求逆或行列式值的计算,同时该方程也具有直接法计算分岔时速度快的优点。