中文摘要：

由于现有雷电波下的非线性电阻模型已不再适用于金属氧化物避雷器（MOA）在电流波头乓〈8bts时的仿真计算，为寻找一种适合于陡波下MOA仿真计算的模型，详细论述了反映MOA陡波下动态性能的3种电气模型的等值电路，重点讨论了IEEE推荐模型、PINCETI模型（简化的IEEE模型）的参数确定方法，两种模型均有效反映了MOA在陡波作用下的电感效应。最后举例说明了IEEE模型和PINCETI模型的具体计算方法，对模型的仿真计算值和实测值进行比较后得出：IEEE推荐模型和PINCETI模型均有较高的计算精度，其中PINCETI模型的参数确定方法较IEEE推荐模型更为简便，更适合于工程应用。

英文摘要：

This paper presents three electrical models of Metal Oxide Surge Arrester （MOA） concerning the dynamic characteristics of MOA under steep front waves in order to find a computation model for MOA under steep front waves. The model is derived from the model recommended by IEEE W. G. 3.4. 11 ,which is named as IEEE model. Parameter definition of IEEE recommended model, PINCETI model and the analysis on the accuracy of the two models are discussed in detail. The present model could not be applied to the calculation of MOA when the rise time of the current wave is less than 8 μs.. The application of IEEE recommended model and PINCETI model are introduced by the use of an specific example. Then the simulation results and the experimental data have been compared. All of the test results obtained by the manufactures are compared with the computation results of the two models. Conclusion is drawn that both the IEEE recommended model and PINCETI model present good accuracy. The main innovation introduced by the paper lays in the possibility to define an approximate dynamic model even if data about residual voltage for steep front pulse are not defined in the manufactures data sheet. Both models can predict the operation of the metal oxide arrester in the system. Because the parameter definition of PINCETI model which does not require iterative correction is much convenient than IEEE model , and the PINCETI model is much suitable for application, PINCETI model has been recommended for computation.