计及导体互感的复杂接地网的频域分析方法

基于矩量法和电路理论，提出了一种新的分析接地网频域性能的数值方法。该方法以各段导体的轴向电流为待求变量，待求量比较少。同时，该方法考虑了导体间的互感的影响，使求解结果更加有效，可以用来分析注入电流频率为1MHz以内的接地网的接地性能。为了验证该方法的有效性，在一个试验接地网上进行了有关测试。试验表明，文中方法的结果与测试结果吻合得很好，且优于已有的不考虑互感的频域分析方法。

ANALYSIS OF THE COMPLEX GROUNDING GRIDS IN FREQUENCY DOMAIN CONSIDERING MUTUAL INDUCTANCES

Based on the method of moment and circuit theory, a new numerical method to analyze the grounding grids fed by harmonic current is presented. In the method, only longitudinal currents of the grid segments are used as unknown variables so that the mutual inductances can be considered and the number of unknown variables is small. The method can be used to analyze the grounding impedance and the ground potential rise distribution on the earth surface with the frequency of the injected currents up to 1MHz. In order to verify the method, experiments are done on a real small grounding system for test. The calculated results obtained with the method presented in this paper are in agreement with the results gotten by the experiments and better than those obtained with the method that does not consider mutual inductances.