Line disassembling and test method of extra-high voltage converter transformer valve group

The invention belongs to the electric power maintenance technical field and relates to a line disassembling and test method of an extra-high voltage converter transformer valve group. The method includes the following steps that: S1, the outgoing lines of grid-side low-voltage neutral point bushings are disassembled; S2, valve-side earth switches are turned off, and grid-network earth switches are turned on; S3, the direct-current resistance of windings is tested; S4, line disassembling is performed on the high-voltage ends of grid-side voltage transformers, the valve-side earth switches are turned on, and the grid-network earth switches are turned off; S5, grid-side high-voltage bushing and grid-side winding-connected assemblies are tested; S6, the valve-side earth switches are turned off, and the grid-network earth switches are turned on, and valve tower earth switches are turned off; and S7, valve-side bushing and valve-side winding-connected assemblies are tested. With the method of the invention adopted,