500 kV HVDC Valve Impact Test Technology

The valve insulation type test of ±500 kV HVDC power transmission is the test of highest voltage grade now on the world. The impact test is a difficult point in valve insulation type test, and the requirement for testing loop and equipment is very high. The paper introduced its structural, load property, converter impact test and single valve impact test technology taken a complete quadruple valve test of Three Gorges - Shanghai ±500 kV HVDC power transmission as an example, and gave partial test result. The test result shows that the internal parameter design of this valve satisfies the technical requirements.