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Beijing Winter Olympics to be supplied by 100% clean energy

Author : PCEC

19 May 2021

As we approach the 24th Winter Olympic Games, various projects are proceeding intensively and efficiently. Being a "green Olympics" is one of the important concepts for the Beijing Winter Olympics in 2022, and the aim for organisers is that the event and all venues will be completely powered by clean energy – a pioneering move in the history of the Olympics.

Image: Wikimedia/User:Vikarna
Image: Wikimedia/User:Vikarna

The “green” energy will be generated in Zhangbei which is rich in wind and solar power. The large-scale renewable energy base was planned by the Chinese government. “The Zhangbei VSC-HVDC Project has significantly improved the local new energy delivery capacity. This project can deliver about 14 billion kilowatt-hours of green power to Beijing every year, supplying about 1/10 of Beijing’s electricity consumption, including directly meeting the Beijing Winter Olympics. The electricity demand for venues in Beijing and Yanqing, together with the Zhangjiakou Winter Olympics venues consuming local green electricity on-site, enabled the Beijing Winter Olympics venues to achieve the goal of using 100% green electricity for the first time in the history of the Olympics,” said Tian Shenglin, Director of Construction Department of Electric Power Co., Ltd.

The project started in February 2018, and the construction task was completed in December 2019. Subsequently, the project entered the commissioning stage. It successfully passed a comprehensive and strict commissioning test and 168-hour trial operation on June 25, 2020, before officially being put into operation on June 29.

The Zhangbei VSC-HVDC Project has a total investment of 12.5 billion yuan (£1.7 billion), and includes four newly built converter stations in Zhangbei, Kangbao, Fengning and Beijing, with a rated voltage of ±500 kV, a rated transmission capacity of 4.5 million kilowatts, and a transmission line length of 666 kilometres. It reliably interconnected the Zhangbei New Energy Base, Fengning Energy Storage Power Supply and the Beijing Load Center, greatly increasing the proportion of clean energy supply, and providing strong and abundant green energy guarantees for the Winter Olympics.

The details determine the success of the technology

The Zhangbei Rouzhi Project adopts China’s original and world-leading new flexible DC grid technology. It has the characteristics of strong controllability, fast power adjustment speed, and flexible operation mode. It can effectively suppress AC voltage fluctuations and reduce the impact of power fluctuations on the receiving end grid. Effectively solve the safety problems of intermittent energy generation such as wind power and photovoltaic power generation.

“Converting AC power to DC power is one of the ways to effectively deliver power from the source to the client. The speed of long-distance transmission of DC power is faster,” said the Technical Leader of Nanrui Relay Electric Co., Ltd., who provided converter valves for this project.

It is with these details that the Zhangbei flexible DC project has achieved 12 world firsts, effectively solving the three problems of grid connection, transmission and consumption of green power in the Zhangbei area. Renewable energy is collected at multiple points to form a stable and controllable power source to deliver green power to Beijing.

It is particularly worth mentioning that 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, fully meet the electricity demand of 26 Winter Olympic venues in Beijing and Zhangjiakou, and reduce carbon dioxide emissions by 12.8 million tonnes.

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