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分别采用单元特性曲线的局部线性化法、Ｓｕｔｅｒ曲线的牛顿———辛普生法和Ｓｕｔｅｒ曲线的局部线性化法分析了水泵断电的过渡过程，计算表明三种数值分析方法的结果完全吻合，局部线性化能保证计算结果绝对收敛．
The local linearization method of unit characteristic curve, the Newton-Simpson method of Suter curve and the local linearization method of Suter curve were respectively used to analyze the transition process of pump power-off. The results show that the results of the three numerical analysis methods are in good agreement with each other, Linearization can guarantee the absolute convergence of the calculation results.