Dogbone for Transformers

The key national west-to-east power transmission project invested and constructed by China Southern Power Grid-Wudongde Power Station Power Transmission Guangdong Guangxi UHV Multi-terminal DC Demonstration Project (Kunliulong DC Project for short) has been put into production ahead of schedule. This is the world’s first ±800 kV UHV multi-terminal flexible DC transmission “high-speed road”, spanning Yunnan, Guizhou, Guangxi, and Guangdong, with a total length of 1452 kilometers. It has continuously sent the abundant hydropower from Wudongde Power Station, the world’s seventh largest hydropower station, to the power load center of the Guangdong-Hong Kong-Macao Greater Bay Area, injecting strong green energy into the rapidly recovering Greater Bay Area.

The project was fully started in December 2018, with a total investment of 24.26 billion yuan. It is planned to be completed and put into production before the 2021 flood season. China Southern Power Grid Corporation thoroughly implements the Party Central Committee’s concept of green development and regional coordinated development, does a good job of “six stability”, implements the “six guarantees” task, implements the “two new and one heavy” construction requirements, and integrates the efforts of the entire company to promote project construction. Do everything possible to get back the delayed construction period of the new crown pneumonia epidemic. This phased production is from Yunnan to Guangdong flexible DC bipolar low-end, 30 days ahead of schedule.

The Kunliulong DC project mainly relies on Wudongde Power Station to transmit Yunnan hydropower to Guangxi, Guangdong. The project started at Kunbei Converter Station in Yunnan and sent electricity to Liubei Converter Station in Guangxi and Longmen Converter Station in Guangdong, so it is referred to as “Kun Liulong”. The project is of great strategic significance. Its completion and commissioning will further optimize the energy structure of the five southern provinces and regions, and support a more stable and safer green power grid from west to east.