Beijing Daily:

All venues will be powered by green electricity during the 2022 Winter Olympics, the first time in Olympic history. Where does the green electricity come from? How to ensure the safety and stability of green electricity? What technological breakthroughs have been made, and what is the current state of power operations? Thank you.  

Liu Yumin:

Thank you for your interest in green power. Green power is also known as green electricity, which refers to electricity converted from renewable energy by means of wind, hydropower and solar photovoltaic. During Beijing 2022, all venues will be powered by green electricity. The realization of green electricity is largely thanks to three aspects:

First, in terms of clean energy distribution, the green power supply for the Beijing Winter Olympics benefit from the coordinated development of the Beijing-Tianjin-Hebei region. Among the three competition zones, Zhangjiakou and Yanqing have abundant clean energy reserves. When visiting, you can see that there are many big windmills around the Guanting Reservoir in Yanqing, as well as in Zhangjiakou. These are wind power generation facilities that were built more than 10 years ago. In 2008, the Guanting Reservoir wind farm achieved a wind power generation breakthrough in Beijing for the first time. According to our calculations and estimates, Zhangjiakou's exploitable wind energy reserves exceed 40 million kilowatts and the exploitable solar energy resources reach 30 million kilowatts. In addition, the annual output of biomass resources is more than 2 million metric tons. So the reserves of renewable energy are very sufficient, which guarantees the supply of green electricity for the Winter Olympic venues.

Second, regarding the infrastructure integration, Mr. Li Sen just mentioned that the 500 kV flexible DC power grid in the Beijing-Tianjin-Hebei region has adopted many new, world-class technologies, as well as pioneered various other technologies. The DC grid network boasts the highest voltage level and the largest transmission capacity in the world. Through this power grid, we can transmit the green power from Zhangbei county to every venue across the three competition zones with minimal loss.

Third, during the operational processes, we have also achieved a complementary and coordinated system based on multiple energy sources. The surplus electric energy on the DC grid will be transported to the Fengning Pumped Storage Power Station constructed by the State Grid, one of its existing power facilities. When the demand for electricity becomes high, Fengning Pumped Storage Power Station will send the stored electricity to the grid, which is akin to backing up a large "power bank" for the entire network. Through energy complementation and coordination work, the power security of the Winter Olympic venues is guaranteed. Thank you.