In China, where power is often located far from the city's electricity center, transmission lines need to span hundreds or even thousands of kilometers. EHV technology can minimize losses and increase long-haul transmission while increasing transmission efficiency.
Sulfur hexafluoride gas insulated metal enclosed transmission line (GIL) is the ideal solution for underground power transmission and minimum transmission loss. GIL is ideal for UHV transmission when harsh geographical conditions do not allow the laying of overhead lines or underground cables select.
The Huainan-Nanjing-Shanghai 1000 kV UHVAC transmission project built by State Grid Corporation of China is the first of the 12 key transmission channels in the national air pollution prevention and control action plan. After the completion of the project, it is estimated that the annual saving of coal for power generation can be reduced 9600 tons of sulfur dioxide emissions, nitrogen oxides 530,000 tons.
The Sutong GIL integrated pipe corridor passes through the river from the bottom of the Yangtze River and is the world's first UHV crossing tunnel with a length of 5.7 km and the deepest exploration reaching 75 meters at the bottom of the Yangtze River.In this project, ABB is responsible for providing The design, delivery and commissioning of the 1000 kV GIL ABB's solutions will maximize energy transmission and minimize transmission losses, help to secure the energy security of the East China UHV grid and support economic and social development.
Zhang Jinquan, Senior Vice President of ABB Group and Head of China Division of Power Grid Division, said: "We are very pleased to participate in the world's first UHV tunnel project and provide GIL solutions. ABB is committed to enhancing customer value through innovation. Our UHV Technology will support China to achieve high-capacity power transmission, enhance grid transmission capacity and reduce environmental impact. '