China's high-end transmission technology has won the bid for the first time in the European national network, German wind power flexible DC transmission project.

It is reported that State Grid Intelligent Electroweb Research Institute Co., Ltd. (referred to as "State Grid Intelligent Research Institute") won the bid for the German offshore wind power flexible DC transmission project, which marks the first time that China's high-end transmission technology has entered Europe. it will effectively promote the high-quality development of China's semiconductor devices, high-end power equipment, offshore wind power and other related industries.

TenneT, an European transmission grid operator, issued a bid-winning notice on February 14 in Germany, confirming that the consortium composed of the National Network Intelligence Research Institute, McDermott of the United States and China Electric Power Engineering Co., Ltd. of Nanrui Group serves as the EPC general contractor of "BorWin6 offshore wind power flexible DC transmission project".

After many rounds of competition, the National Network Intelligence Research Institute stands out in the competition with ABB, Siemens and GE, and will be responsible for the core work such as the design of (HVDC) system, the design and development of flexible DC converter valve and the joint adjustment of engineering system in the construction of "BorWin6 offshore wind power flexible DC transmission project".

What does the "BorWin6 Project" do?

The "BorWin6 Project" is the 18th offshore wind power project for the development of offshore wind power in Germany, and it is one of the important projects to implement the clean transformation of electric energy in Germany. It is understood that the project is scheduled to be put into operation by the end of 2027 to send offshore wind power from the North Sea of Europe to mainland Germany. The project includes 235 kilometers of land and sea lines: about 190 kilometers of sea cable and 45 kilometers of land cable.

It is reported that BorWin6 is the last offshore grid-connected system implemented by TenneT in the North Sea of Germany using 320kV technology, and the future project will achieve a technological leap to 525kV and 2GW transmission capacity. Tim Meyerj ü rgens, chief operating officer of TenneT, said the project was an example of a continued decline in the cost of offshore wind power grid-connected systems.

It is worth noting that Europe is currently the largest market for offshore wind power development in the world. TenneT is one of the largest power operators in Europe, undertaking about 70% of Europe's high-voltage and large-capacity offshore wind power flexible projects, has successively built 8 GW offshore wind power flexible projects, and will gradually complete offshore wind power flexible projects with a cumulative total of about 17GW by 2030.

Flexible DC Technology Electroweb upgrade weapon

The North Sea wind power flexible DC transmission project in Germany has complex application conditions and high technical standards, which represents the highest level of flexible DC engineering. Flexible DC transmission technology is a new type of DC transmission mode after AC transmission and conventional DC transmission. It is the most flexible and adaptable new generation of transmission technology in the world. It provides an effective technical means for Electroweb upgrade.

The main reasons why this technology is suitable for new energy transmission include no reactive power compensation, isolated island operation, and suitable for multi-terminal systems, so there are more DC application scenarios than conventional DC applications. But correspondingly, the cost of the equipment is higher, and the overall technical difficulty and system control difficulty are higher in order to realize the multi-terminal scene. And flexible DC transmission occupies a small area, offshore wind power scene, the entire converter station, voltage division station can not be built in the case of advantages.

In China, the exploration of flexible DC transmission technology is under way. The western and eastern coastal areas of China are rich in wind resources, and the proportion of renewable energy power generation in some areas will exceed 50% in the future, which requires more flexible grid-connected technology.

Previously, during the 14th five-year Plan period of the National Electroweb Plan, the total investment in the UHV AC / DC project was 300.2 billion yuan, including 12600 km of UHV AC lines, 174 million KVA of substation capacity, 17200 km of DC lines and 163 million kW of converter capacity.

Winning the bid for this project is an important achievement in promoting the implementation of the "one body and four wings" development layout of the National Electroweb Company.