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为满足±1100 kV特高压直流换流阀绝缘型式试验要求，针对±1100 kV特高压换流阀冲击电压试验实施方法进行研究。采用伽辽金边界元法分析了冲击本体屏蔽罩的表面电场分布，依据试验室现有条件，研究屏蔽罩表面场强随其半径的变化规律，提出场强的控制措施，从而抑制电晕产生，防止阀试验大厅空气间隙的击穿。根据 IEC 标准，提出满足±1100 kV特高压换流阀冲击试验要求的电路拓扑，研究等效负载的设计，为±1100 kV特高压换流阀冲击试验的实施提供理论依据。“,”In order to meet the requirements of dielectric tests on ±1 100 kV ultra high voltage direct current (UHVDC) converter valve, the impulse test method of ±1 100 kV UHVDC converter valve has been studied. Surface electric field intensity on shielding cases of the impulse test equipment was calculated by using Galerkin boundary element method. According to existing conditions, a feasible measure was proposed, which can be employed to decrease electric field dramatically and avoid corona discharge of shielding cases. In addition, the test circuits for ±1 100 kV converter valve were put forward, and the design for equivalent loads was studied.