8 pm, 8th July 2012, Jinping-Sunan ±800kV UHVDC project was commissioned successfully. The lower end of the converter station was ready for commercial operation. Jinping-Sunan project was the first application of A5000 UHVDC converter valve, a proprietary technology developed and owned by C-EPRI Electric Power Engineering Co., Ltd.

The performance of A5000 UHVDC converter valve was well proved during the commissioning of the project. It passed all the tests successfully, such as AC system ground fault test, electrode ground fault test, 3-hour full load operation test and 2-hour over load operation test, etc., without any error report.

The successful operation of A5000 in Jinping-Sunan ±800kV UHVDC project marks a great milestone for China’s first self-developed UHVDC converter valve with complete and independent Intellectual Property Right. 

Jinping-Sunan UHVDC transmission project is SGCC’s second UHVDC transmission project. Rated ±800kV/4500A, this UHVDC link travels over a distance of 2100km, running through 8 provinces and municipalities from Xichang in the west to Jiangsu in the east.