由于用水阻器作为电气负荷具有结构简单、造价低廉、适用性广等优点,从而在水电站中得到广泛的应用。三相三极容器式水电阻中的电流场是一种三维似稳场,由于其端部场较复杂,要得到正确的解析解答较为困难,其等效电导位一般只有通过模拟试验及近似理论公式来推算。本文采用子面元数值计算法来 As the water resistor as an electrical load has the advantages of simple structure, low cost, wide applicability and so on, thus being widely used in hydropower stations. The current field in three-phase three-electrode water resistance is a kind of three-dimensional asymptotic field. Due to the complexity of its end field, it is difficult to obtain the correct analytical solution. The equivalent conductance is generally only obtained through simulation and approximate theory Formula to calculate. In this paper, the use of sub-surface element numerical method