Summary of Commissioning Test for HVDC Power Transmission Project from Three Gorges Hydropower Plant to Shanghai

The overall process of commissioning test for HVDC transmission project from Three Gorges Power Plant to Shanghai (abbr. 3GS) is summarized and the commissioning circumstances of the HVDC system are presented. During the commissioning test, the primary and secondary equipments operate well and the functions of control and protection devices are validated. During the start and stop of HVDC system, the operation under normal voltage and reduced voltage and the operation of 3GS HVDC project under rated load and overload, the functions of control and protection devices and that of cooling system are normal. The single item testing results during the system commissioning are analyzed, thus based on design specification and relevant standards the test conclusions are given. Finally, the principal technological problems that are found and solved in the commissioning of 3GS HVDC project, the innovation for system commissioning and the experiences from the commissioning test, which are available for reference to the commissioning of HVDC transmission projects in future, are summarized.