| Yunnan–Guangdong HVDC | |
| Country: | China |
| Province: | Yunnan, Guangdong |
| Direction: | west-east |
| Start: | Chuxiong |
| Finish: | Suidong, Zengcheng |
| Owner: | China Southern Power Grid |
| Substation Manufacturer: | Siemens |
| Construction: | 2007 |
| Est: | 2010 |
| Type: | overhead transmission line |
| Current Type: | Ultra HVDC |
| Length Km: | 1418 |
| Capacity: | 5,000 |
| Ac Voltage: | 500 kV |
| Dc Voltage: | 800 kV |
| Poles No: | 2 |
The Yunnan–Guangdong HVDC is a high-voltage direct current transmission system connecting Chuxiong in the Yunnan to Suidong, Zengcheng in Guangdong, China. It is the first HVDC link in the world operating at a transmission voltage of 800 kV.[1] The transmission line is operated by China Southern Power Grid. In 2007, the order to supply the system was awarded to Siemens Energy.[2] The first pole was put into operation in December 2009 with the second pole to follow in June 2010.[3]
The transmission system has a transmission capacity of 5,000 MW and a rated DC current of 3,125 A. It has a total length of .[4] It transmits electricity from the hydropower plants in the Yunnan to the Guangdong, including cities of Guangzhou and Shenzhen.[1]
Yunnan–Guangdong HVDC shares the grounding electrode together with HVDC Guizhou - Guangdong II at Linwu (coordinates: 23°44′48″ N 113°17′09″E).