The hottest UHV multi terminal Hybrid DC demonstra

2022-08-13
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The construction of the world's first UHV multi terminal Hybrid DC demonstration project was fully launched

on May 15, China Southern Power Company fully launched the construction of the UHV multi terminal DC demonstration project in Guangdong and Guangxi (hereinafter referred to as "kunliulong DC project"). The project will realize a number of innovations in power technology and create a number of world firsts: the UHV multi terminal DC transmission project with the largest capacity in the world, the first

on May 15, China Southern Power Company fully launched the construction of the UHV multi terminal DC demonstration project in Guangdong and Guangxi (referred to as "kunliulong DC project"). The project will realize a number of innovations in electrical technology and create a number of world firsts: the world's largest UHV multi terminal DC transmission project, the first UHV multi terminal Hybrid DC project, the first UHV flexible DC converter station project, and the first flexible DC transmission project with the ability of DC fault self removal of overhead lines

Kunming Liulong DC project starts from Yunnan kunbei converter station in the west, and ends at Guangxi Liubei converter station and Guangdong Longmen converter station in the East. It adopts ± 800 kV three terminal Hybrid DC technology, with a total length of 1489 kilometers and a transmission capacity of 8 million KW. After the completion of the project, Yunnan clean hydropower will be directly transmitted to the load centers of Guangdong and Guangxi to meet the "14th five year plan" and the subsequent coordinated economic development of the southern region and the power demand for the economic development of Guangdong Hong Kong Macao Bay area. It can reduce the coal consumption of Guangdong Hong Kong Macao Bay Area by 9.2 million tons and the carbon dioxide emission by 24.5 million tons every year, effectively promote energy conservation and emission reduction and air pollution prevention, and make a positive contribution to the clear water and blue sky of Guangdong

the Kunming Liulong DC project adopts a more economical and flexible multi terminal DC system to distribute Yunnan Hydropower to Guangdong and Guangxi, the Yunnan kunbei converter station at the sending end adopts UHV conventional DC, and the Guangxi Liubei converter station and Guangdong Longmen converter station at the receiving end adopt UHV flexible DC. Flexible DC represents the development direction of DC transmission technology in the future. Compared with conventional DC, its technical advantage lies in breaking through the bottleneck that conventional DC has a great impact on the receiving end power system. "Just like the release of water after the opening of the sluice of a large reservoir, the more water required to be 100mm/min in ISO 8295 (GB 10006 is equivalent to ISO 8295), the higher the requirements for the downstream acceptance capacity, and if it cannot be accepted, it will 'flood the golden mountain'. The same is true for electricity, and if it cannot be accepted by the receiving end, it will affect the safety of the system." Rao Hong, chief technical expert of southern power, said, "The control of flexible DC is very flexible, and it can quickly respond to the state change of electricity. The impact testing machine (auto parts testing machine) produced by Shanghai Yihuan Instrument Co., Ltd The plastic granulator is widely used to work in a wide range of fields of the national economy, such as rubber, plastics, textiles, wires and cables, composite materials, leather, waterproof coiled materials, non-woven fabrics, geotextiles, paper and other non-metallic materials, as well as metal materials such as metal wires, metal foils, metal plates and metal bars, to carry out experimental mechanical properties such as stretching, tightening, bending, shearing, peeling and tearing, so as to support the safe and stable operation of electricity. "

"the construction of kunliulong DC project is an important measure to implement the west to East power transmission strategy and promote the consumption of clean energy. It is also a practical need to realize the optimal allocation of resources and serve the construction of Guangdong Hong Kong Macao Great Bay area. The project is planned to be put into operation in 2020 and put into operation in 2021. At that time, the channel power transmission capacity of 8million kW will be increased, and the annual power transmission capacity will exceed 32billion kwh." Li Qingkui, Secretary of the Party group and chairman of China Southern Power Corporation, said

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