电磁暂态计算中 MOA 的线性和非线性混合模型

Linear and Nonlinear MOA Modeling of Electro Magnetic Transient Behavior

提出了一种综合线性和多指数非线性的ＭＯＡ模型，使ＭＯＡ的特性曲线和多指数模型相比更为平滑，更加符合实际的特性曲线．在电磁暂态计算中，用牛顿法求解ＭＯＡ时，如ＭＯＡ采用多指数模型，会产生数值振荡，而采用ＭＯＡ的线性和非线性混合模型，可避免数值振荡的发生．和采用拟牛顿法相比。

A modefied MOA (metal oxides surge arrester) model is presented; it uses both the linear and multi exponential model in contract to using only the latter. The results are smoother and better to represent the actual MOA characteristics. Oscillations of the non linear equations that would normally prevail in the elecro magnetic transient calculations when using the Newton method are eliminated while the speed of calculation exceeds that of the quasi Newton method.