The Yangtze River Delta region has now become another haze concentration area after North China. Reporters learned today from the power sector that East China Power Grid (including Shanghai, Jiangsu, Zhejiang, Anhui and Fujian) stepped up efforts to transport trans-regional clean energy by UHV and actively promoted the prevention and control of air pollution.
UHV AC transmission is the world's highest voltage transmission technology, but also support China's long-term sustainable development of energy and power of major strategic technologies. It is understood that there are currently two UHV AC power transmission projects in operation in the East China Power Grid, including the Huainan-Shanghai UHV AC Transmission Demonstration Project put into operation in 2013 and the UHV transmission line from North Zhejiang to Fuzhou in 2014 AC transmission project, a total of seven UHV substations and a UHV power plant, the total length of more than 2,500 km, becoming the world's longest UHV AC lines, the largest plant grid.
While increasing the DC transmission voltage level, it has the advantage of increasing the transmission distance, increasing the transmission capacity and reducing the transmission loss. At present, there are three HVDC projects in East China Power Grid, with the power transmission distance of 1907 km: Xiangjiaba-Shanghai Project, Jinping-Sunan Power Transmission Project with a distance of 2097 km, power transmission distance of 1669 km Xiluodu - West Zhejiang project, East China Power Grid has thus become the world to accept a single DC maximum transmission power, receive the largest total capacity of UHV DC power grid.
The commissioning of these UHV AC and DC projects will play an important role in improving the ability of outside incoming power and the exchange of internal power in the receiving area of ​​East China Power Grid to ease emissions. Especially for the three UHV DC projects, the sending terminals are both large-scale hydropower bases in southwest China, and therefore have a positive effect on optimizing energy structure, promoting the development of clean energy and preventing pollution.
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