Research on routine test of HVDC converter valve and its engineering practice

As one of core equipments for HVDC power transmission project, the DC converter valve is complicated in structure and its manufacture is difficult, therefore overall routine test of DC converter valve is an important measure to ensure the performance of both assembling and components of DC converter valve to cope with design requirements, and is also the precondition for its engineering application. The routine test method for the converter valve is researched. By means of analyzing the stress of the converter valve during the operation and combining with IEC 60700 standard, the items of the routine test for the converter valve and the test requirements are put forward; the procedures of the routine test is established and test circuit and corresponding test scheme are researched and applied to ±800 kV UHVDC power transmission project from Jinping to Sunan. The reasonability and effectiveness of the proposed test method are verified by actual test results.