电力系统稳定性问题的求解，迄今主要有两种方法：逐步积分的数值解法和利用李雅普·诺夫直接法理论的求解法。
There are mainly two kinds of method to solve the stability issue of electric power sys-tem thus far, one is step by step integral method, the other is directive method based on Liyapunov theory.
数学模型系以对图解法几何图形的解算为依据，并以逐步逼近计算法求解。
The mathematical model is based on the calculation of geometrical figures by graphic method and the solution is obtained by successive approximation.
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