China News Service, Nanjing, December 10 (Huang Lei and Zhu Xiaoying) The power "artery" spanning 5 provinces and cities in the east and west of China, 2087 kilometers long, with a total investment of about 30 billion yuan-Baihetan-Jiangsu ±800 kV UHV Construction of the DC transmission project started on the 10th.
The Baihetan-Jiangsu ±800 kV UHV DC transmission project is the core project of the national "West-East Power Transmission".
The project has a total length of 2087 kilometers, passing through 5 provinces and cities in Sichuan, Chongqing, Hubei, Anhui and Jiangsu. It starts at the Baihetan converter station in Liangshan Prefecture, Sichuan and ends at the Yucheng converter station in Suzhou, Jiangsu. , Chongqing Jiangjin Yangtze River, Hubei Zhongxiang Han River, Anhui Ma'anshan Yangtze River and other four major leaps.
The project has a maximum power transmission capacity of 8 million kilowatts, which is equivalent to the highest power load of a large and medium-sized city in Jiangsu.
The project is planned to be completed in 2022 and is expected to boost the benefits of upstream and downstream industries of 48 billion yuan.
A reporter from China News Agency learned that the Yucheng Converter Station in Suzhou will apply conventional DC and flexible DC hybrid cascade technology for the first time in the world's DC transmission field.
Its R&D and application can quickly achieve millisecond-level energy balance controllable self-recovery energy dissipation devices, alleviating the voltage stability pressure caused by the reduction of thermal power units in the East China Power Grid, thereby greatly improving the power receiving capacity of the East China Power Grid.
For a long time, China's energy resources and power load have been unevenly distributed. About 80% of the country's coal and water resources are distributed in the northwest, while about 80% of the power load is concentrated in the central and eastern regions.
The installed capacity of hydropower in Sichuan has a large proportion of installed capacity, but its regulating capacity is insufficient.
Jiangsu is a province with a large energy consumption and a small resource. The electricity consumption of the whole society ranks second in the country throughout the year. More than 92% of coal, more than 94% of crude oil, and more than 99% of natural gas rely on external supply.
"In the future, Sichuan clean hydropower will be sent to the Yangtze River Delta city cluster, which is conducive to the further optimized allocation of energy resources across the country." said Yu Yuezhong, deputy general manager of State Grid Jiangsu Electric Power Engineering Consulting Company and project manager of Yucheng Converter Station.
In recent years, a number of UHV projects such as Jinsu, Yanhuai, Xitai, and Huaishang have been completed successively, and clean power sources from energy bases in the northwest and southwest have been continuously sent to the east.
After the completion of the Baihetan-Jiangsu ±800 kV UHV DC transmission project, the number of UHV foreign power transmission projects in Jiangsu will increase to five, and it is expected that the annual external power supply to the Jiangsu transmission area will reach 180 billion kWh.
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