Potential distribution and optimization method for water, electricity and optical paths of large-capacity flexible converter

The present invention relates to a potential distribution and optimization method for water, electricity and optical paths of a large-capacity flexible converter, and belongs to the field of large-capacity flexible direct current transmission. The method is characterized in that: the Green's function is used to calculate parameters of a grounding grid; the self-resistance and mutual resistance arecalculated by using the mirror image method; and under uniform soil conditions, the potential distribution of an irregular grounding grid of any shape after being injected with a constant current canbe calculated. By using the method provided by the present invention, an actual substation grounding system is calculated and analyzed; and by plotting the calculated data, the potential distributionof the grounding grid surface is analyzed, and the safety of the grounding grid is improved. 本发明涉及种大容量柔直换流器水、电、光路的电位分布及优化方法，属于大容量柔性直流输电领域。采用格林函数计算接地网参数的方法，用镜像法计算自电阻和互电阻，在均匀土壤条件下，可以对任意形状的不规则接地网注入恒定电流后的电位分布进行计算。利用这方法，计算分析了个实际的变电