一种接地网雷电流冲击数值模型模拟的计算方法

Calculation method of numerical model simulation for grounding grid lightning current impact

通过傅里叶级数对双指数函数的雷电流进行分解,得到各个频率分量。在此频域特性的基础上提出一种计算接地参数的等效模型,利用电路的节点电压法得出接地网雷电冲击数值模型模拟的计算方法。根据该方法运用MATLAB进行编程,将运行的结果与权威的接地分析软件CDEGS的结果相比较,证明了提出的计算方法正确、可行。

Double exponential function of lightning current is decomposed by fourier series to acquire components of every frequency. On the basis of characteristics of the frequency domain, this paper proposes the equivalent model to calculate grounding parameters, a model which works out numerical model simulation for grounding grid lightning cur- rent impact by node voltage method. It also proposes to program by MATLAB according to the method and compare the result with that acquired by authoritative grounding analysis software CDEGS, so as to verify the correctness and feasibility of the method.