On June 11, the Yunnan-Guizhou ±500 kilovolt (kV) direct current (DC) transmission line was officially put into operation. As the world’s first ±500 kV three-terminal power project developed by China Southern Power Grid (CSG) in south China, the line will effectively increase the hydropower consumption in Yunnan Province, southwest China and deliver more clean electricity to Guangdong Province in southeast China.
ABB Power Grids provided leading high-voltage (HV) technologies for the newly constructed Luquan converter station in Yunnan Province to ensure safe and reliable power supply.
The Yunnan-Guizhou transmission line is China’s first “three-terminal” DC power project that transformed from a “two-terminal” DC transmission line. It added a converter station in Luquan, Yunnan, connected with the established Guizhou-Guangdong DC transmission line and achieved the three-terminal DC transmission link across Yunnan, Guizhou and Guangdong provinces. It is expected to transmit around 6 billion kWh of hydropower every year and reduce coal consumption by 1.8 million tons and carbon dioxide (CO2) emissions by about 4.8 million tons.
Although facing the challenging schedule, ABB Power Grids supplied 500 kV gas-insulated switchgear (GIS) and gas-insulated line (GIL) to the project in 5 months, and overcame the situation of COVID-19, successfully completing the on-site installation and commission.
As a market and technology leader in GIS technology, ABB Power Grids offers ratings and applications from 72.5 kV to 1,200 kV and has a global installed base of almost 37,000 bays. GIS is a compact metal encapsulated switchgear that uses pressurized insulating gas and enables safe operations in confined spaces while significantly reducing equipment footprint. As a key equipment in HVDC projects, GIS will largely improve the safety and reliability of the power network.
Meanwhile, ABB Power Grids also contributed to the construction of the Kunliulong ±800 kV DC power project, another transmission line owned by CSG to transfer power from southwest to southeast China. The company provided key technologies, including GIS, DC dry capacitor, semiconductor and high-speed switches. ABB Power Grids’ technology will ensure reliable and efficient clean energy transmission with optimal power quality and minimal losses from Yunnan Wudongde Hydropower Station to Guangdong-Hong Kong-Macao Greater Bay Area and Guangxi Province.
The 1452-kilometer Kunliulong project is the world’s first ultra-high-voltage (UHV) multiple terminal DC project to adopt VSC-HVDC (high voltage direct current) technology, reaching 8 million kilowatts (kW) capacity. It will pass across Kunming, Guizhou, Guangdong and Guangxi provinces in south China and reduce coal consumption by 10 million tons and CO2 emissions by 26.6 million tons each year in the Guangdong-Hong Kong-Macao Greater Bay Area, effectively enhancing energy conservation and air pollution prevention.
“The two major power projects developed by CSG are essential to promote the consumption of clean energy and coordinate regional development. Although facing the great challenges amid the epidemic, we worked closely with our customers and strongly supported the project to operate as scheduled,” said Zhang Jinquan, Senior Vice President of ABB Group and Head of Greater China Region. “Our leading technology will continue to help China deliver clean electricity power across regions and speed up China’s energy transformation and high-quality economic development.”
As a leading power technology provider, ABB Power Grids pioneered, both the commercial HVDC and GIS technologies over 50 years ago. In China, ABB has participated around 40 HVDC power projects by far, including multiple HVDC transmission lines built by CSG, such as the ±800kV Nuozhadu-Guangdong and Dianxibei-Guangdong UHVDC power projects.
ABB Power Grids is a global leader and pioneer in power technologies. We create value for customers across the energy, industrial, transportation and infrastructure sectors, delivering an extensive range of digitally-advanced solutions. Active in more than 90 countries, our experts contribute deep insight that enhances reliability, efficiency and safety. Together, we are committed to shaping the future of sustainable energy for generations to come, as the partner of choice for a stronger, smarter and greener grid. www.abb.com/grid
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