The completion of the main project of the transmission of electricity from the east to the Huaihe River

According to reports, the Suidong project is the first double-circuit UHV AC transmission line with the highest voltage level and largest capacity in the world, representing the latest achievements and levels of UHV technology in China. The installation of power transmission lines across the Huaihe River Electrical Tower is the most difficult part of the project. This morning, the main project of the cross-Huaihe line will be completed.

The transmission of electric power from Huai'nan to Shanghai's UHV power transmission project is an important part of the UHV backbone grid of the State Grid. It is currently the world's highest voltage class and largest capacity, and it is the first double-circuit line project on the same tower. After a total of 21 counties and cities in 4 provinces (cities). The Sui-Dong Electric Project is an important part of the national 11th Five-Year Plan for Electric Power Development and a major strategy for optimizing the allocation of energy resources in East China. The Huaihe River Crossing Project, known as the Throat Project, is located in Huainan City, Anhui Province, the starting point of the UHV. The total length of the crossing section is 2,445 meters, and the height of the tower crossing the tower is 198 meters. Today's main project was successfully completed, which also marked a perfect period for this bid.

The demonstration project of the UHV AC transmission line with the highest voltage class and largest capacity in the world and the Huai'nan-Shanghai 1000 kV UHV AC transmission line demonstration project in the world is currently in full implementation. The project will greatly ease the current power shortage in East China.

In fact, this must be understood from the distribution of China's resources. China's resources and energy demand are in reverse distribution. Resources are mainly distributed in the north and northwest, but over 70% of the electricity demand is in the southeast. The transformation of resources on the spot into electricity, through UHV long-distance transmission, is the greatest significance of the Sui-Dong East project. It is actually the goal of turning coal in the west into electricity, coal from the air, and sending electricity to the Yangtze River Delta. The project's long-term power transmission capacity reaches 10 million kilowatts, which is equivalent to building 10 new million kilowatt-class power plants in Shanghai. The annual transmission of variable electricity is about 50 billion kwh, which is equivalent to the standard for sending coal of 16 million tons. It can be said that the effect is very great.

The main network in East China is currently 500 kilovolts, and the power grid in East China is very dense and criss-cross. The development is approaching its limit. Currently, the problem of excessive current in this area is very prominent, and some short-circuit problems also arise. To build a special high-voltage project from Qindong to the east, one is to increase the voltage level and increase the transmission capacity. In addition, the 500kV short-circuit capacity exceeding the standard can be fundamentally solved, which can meet the long-term development needs of East China Power Grid.

By the end of the 11th Five-Year Plan period, Huainan coal-electric power base had already put into production 8.55 million kilowatts of power, and the power projects that had already carried out preliminary construction work had reached more than 6 million kilowatts. In such a large-capacity case, long-distance, large-capacity, and small-area UHV line construction can be used to truly open up the power transmission highway. On the one hand, it can solve the problem of transport of coal resources in Huainan. On the other hand, it also alleviates some of the bottleneck problems encountered in the long-term high-load operation of East China Power Grid. Tao Yong, general manager of the State Grid East China Transmission and Transformation Engineering Company, said that the “Dongguan East Power Transmission Project” is China’s first UHV AC double-circuit transmission tower on the same tower. It can be said that it represents the highest level of technical research and engineering application of the world’s power grids. The construction can also be said to lead the development of UHV AC transmission in China.