中文摘要：

笔者以变压器内部常见的油纸绝缘结构为例．利用自编程对换流变压器阀侧绕组直流电场。进行了计算，并通过有限元软件ANSYS仿真，验证了文中方法的正确性。基于纸板材料电导率的各向异性特性，推导了电导率各向异性情况下直流电场的数学模型，给出了离散格式，分析了电导率对直流电场的影响，并对1台500kV换流变压器进行了计算。计算结果表明，考虑材料的各向异性后纸板中场强减小，油中场强增大，变化的幅度与电导率初值有关。

英文摘要：

Taking the commonly used oil-paper insulation structure for example, DC electric field at valve side of a converter transformer is calculated with the self-coded program. The programming method is verified by simulation via the finite element software ANSYS. Based on the anisotropie characteristic of conductivity of paperboard material, a mathematical model of DC electric field in the condition of anisotropic conductivity is derived, the discrete format is given, and the effect of conductivity on DC electric field is analyzed. A 500 kV converter transformer is calculated, and the results show electric field strength increases in oil and decreases in that, by considering the anisotropy of the material, the paperboard, and the magnitude of the field strength variation depends on initial value of conductivity.