对网侧绕组接1 000 kV交流、直流侧额定电压为±1 100 kV的特高压换流变压器绕组布置方案进行了研究，分析了各主绝缘结构布置方案的优缺点，选出了最佳结构布置方案，并对其主绝缘结构电场进行了计算，计算结果表明，所推荐的绝缘结构布置合理，绝缘裕度满足工程要求。

The winding arrangement is studied for the UHV converter transformer, whose line side winding connected 1 000 kV AC and rated voltage at DC side was ±1 100 kV DC. Through analyzing the advantages and disadvantages of different main insulation structure schemes, the scheme is recommended. Moreover, the electric field calculation for its main insulation structure is carried out, which shows that the recommended insulation structure arrangement is reasonable, and the insulation margin can meet the engineering requirements.