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Zhang Bei Direct Transmission Project

scanning: author: from: time:2021-01-09 classify:工程案例

On June 29, Zhangbei Renewable Energy Flexible DC Grid Test Demonstration Project was completed and put into production.

The Zhangbei Renewable Energy Flexible DC Grid Test Demonstration Project was completed and put into production on the 29th. The project will provide 100% green power for the Beijing Winter Olympics.

The world's leading new technology of flexible DC grid.

The Zhangbei Rouzhi project has a total investment of 12.5 billion yuan. Four new converter stations in Zhangbei, Kangbao, Fengning and Beijing will be built, with a rated voltage of ±500 kV, a rated transmission capacity of 4.5 million kilowatts, and a transmission line length of 666 kilometers. Zhangbei and Kangbao converter stations are the power transmission terminals, which are connected to new energy sources, the Fengning station is the regulating terminal, which is connected to pumped storage, and the Beijing station is the receiving terminal, which is connected to the capital load center.

The Zhangbei Rouzhi Project adopts my country's original and world-leading new flexible DC grid technology. Flexible DC transmission technology has the characteristics of strong controllability, fast power adjustment speed, and flexible operation mode. It can effectively suppress AC voltage fluctuations, reduce the impact of power fluctuations on the receiving end grid, and effectively solve the problem of large-scale grid-connected consumption of new energy. With the flexible DC grid as the center, through multi-point convergence, multi-energy complementation, time-space complementation, and source-network-load coordination, free and fluctuating power generation on the new energy side and controllable and stable power supply on the load side can be realized.

The Zhangbei Rouzhi Project not only has significant innovation leading and demonstration significance, but also has significant comprehensive benefits and strategic significance for promoting energy transformation and green development, serving green Olympics, leading technological innovation, and promoting the transformation and upgrading of electrical equipment manufacturing.

Provide 100% green power for Beijing Winter Olympics

The Beijing Winter Olympics is an important opportunity for urban energy transformation and upgrading. Beijing has a developed economy and a large demand for energy. In order to meet the requirements for energy conservation, emission reduction and air pollution prevention, it is necessary to reduce fossil energy consumption and gradually increase the proportion of external electricity and renewable energy.

The Zhangbei Rouzhi Project focuses on green Olympics, creates a clean and low-carbon Olympic area, and reliably interconnects the Zhangbei New Energy Base, Fengning Energy Storage Power Supply and the Beijing Load Center, greatly increasing the clean proportion of energy supply, and providing strong and abundant resources for the Winter Olympics Green energy guarantee.

After the project is put into operation, it can meet the demand for delivery and consumption of 7 million kilowatts of new energy installed capacity, and can deliver 14 billion kilowatt-hours of clean electricity every year, fully meeting the electricity demand of 26 Winter Olympic venues in Beijing and Zhangjiakou, helping The Beijing Winter Olympics venues realized 100% clean energy power supply for the first time in Olympic history, saving 4.9 million tons of standard coal and reducing carbon dioxide emissions by 12.8 million tons each year.

Improve new energy development and delivery capabilities

Zhangbei is rich in wind power and solar power resources. It is "the hometown of wind and the ocean of light". It is only 200-350 kilometers away from the Beijing load center. The development conditions are very superior. The scale of development is as high as 85 million kilowatts. It is a large-scale national plan. Renewable energy base, the installed capacity of renewable energy power generation is expected to exceed 10 million kilowatts by the end of 2020.

The Zhangbei Rouzhi Project will support the construction of 6.3 million kilowatts of wind power and photovoltaic power generation, stimulating the investment of local wind and photovoltaic power generation to 60 billion yuan, and the investment has brought obvious benefits. The project can also promote the development of upstream and downstream industries, provide a large number of jobs, and play an active role in stabilizing employment, stabilizing investment, and benefiting people's livelihood.

After the project is put into operation, it will significantly improve the new energy delivery capacity in Zhangjiakou area and effectively promote the local poverty alleviation power stations to absorb new energy. It is expected to benefit 1,110 photovoltaic poverty alleviation power stations and 104,896 poor households, with a total capacity of 1.339 million kilowatts.

Promote the upgrade of power grid transmission technology and electrical equipment

The Zhangbei Rouzhi Project is the world's first DC grid project with network characteristics. The core technology and key equipment are all internationally pioneered. The project has applied the most advanced power production, transmission, storage, consumption and operation control technologies, achieving three major breakthroughs :

——Break through the difficult problem of flexible DC grid construction, put forward flexible and straight networking, multi-point convergence, multi-energy complementary DC grid topology and system plan, and successfully developed hybrid, negative pressure coupled and mechanical DC circuit breakers;

——Break through the problem of increasing the capacity of flexible DC, increase the transmission capacity of ±500 kV flexible DC to the conventional DC level, and increase the rated capacity of a single converter to 1.5 million kilowatts;

—— Break through the reliability improvement problem of flexible DC, and improve the reliability of flexible DC to the conventional DC level.

The innovative practice of the Zhangbei Flexible Direct Project will promote the innovative development of my country's flexible DC transmission technology at higher voltage levels and larger transmission capacity, consolidate and expand my country's technological leadership in the world's DC transmission field, and enhance the independent innovation of my country's electrical equipment manufacturing industry Ability and international competitiveness.


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