"Zhang Bei's wind lights up Beijing's lights" was often mentioned during the Beijing Winter Olympics. 26 venues in the three competition areas of the Beijing Winter Olympic Games have achieved 100% green power supply. How is this process realized? Let's take a look at the space-time journey of green power on the dam in Zhangjiakou.
Bashang has a good "scenery"
In addition to the picturesque scenery, Bashang area of Zhangjiakou, Hebei Province is rich in wind energy and Cecep Solar Energy Co.Ltd(000591) resources.
A wind blew on the dam from spring to winter. In Zhangbei County, Zhangjiakou City, wind power towers stand on the grassland. According to the calculation of State Grid Hebei Electric Power Co., Ltd., the diameter of the fan blade of the five megawatt fan of the national scenery storage and transmission demonstration project is 128 meters, and the sweeping area of rotating in the air is more than 12900 square meters, which is equivalent to 1.8 standard football fields. When such a typhoon generator set operates at full load, the fan blade generates 5.56 degrees of green power per revolution, and the average daily power generation is about 28800 degrees.
There are many windmills and photovoltaic panels on the dam. A 250 Watt photovoltaic panel, exposed to sunlight for 4 hours, can produce 1 kwh of green electricity. They are clean and efficient, with almost zero carbon dioxide emissions.
Zhangjiakou has a wind energy resource reserve of more than 20 million kilowatts, which is the first area in China to be approved to build a double million kilowatt wind power base; The annual average sunshine hours are about 3000 hours, and the annual total solar radiation is 1600 kwh per square meter. In July 2015, the State Council officially approved the establishment of Zhangjiakou renewable energy demonstration zone. At present, the installed capacity of renewable energy in the city has reached 23.47 million KW.
"Expressway" connects Beijing
The iron tower stands according to the situation, and the silver line crosses the forest sea, mountains and hills. A 666 kilometer long Zhangbei renewable energy flexible DC power grid is a "highway" that transmits green electricity directly to Beijing.
On June 29, 2020, the power grid project will be put into operation. After being connected to Zhangjiakou large-scale clean energy, it can supply power to 26 venues in the three competition areas of Beijing Winter Olympic Games. According to the person in charge of State Grid Hebei Electric Power Co., Ltd., the total amount of green power that can be transmitted annually reaches 14 billion kwh, saving 4.9 million tons of standard coal and reducing 12.8 million tons of carbon dioxide every year.
Zhangbei flexible DC power grid is also equipped with Fukang converter station on the road of green power transmission, which plays the role of new energy diversion.
Relying on Hebei Fengning pumped storage power station, Fukang converter station regulates the operation of the whole system - when there is surplus power, it converts electric energy into potential energy of water and stores it. When the power is in short supply, the 400 meter drop can be used to discharge water for power generation to ensure the stable output of power, which is equivalent to assembling a super "charging treasure" for the Winter Olympic Games.
This "expressway" brings together the rich renewable energy in Zhangjiakou, makes use of the complementarity between wind power, photovoltaic, energy storage and other energy forms, overcomes the intermittent and unstable problems of renewable energy power generation, realizes the collection and delivery of Zhangbei ten million kilowatt new energy base, and effectively supports the Winter Olympic venues to realize 100% clean energy power supply.
Show "skill" on the field
After a long journey, Lvdian finally came to the venue of the Beijing Winter Olympic Games. It's time to play a role.
On the Bank of Yongding River, Shougang ski jump platform is eye-catching. The power consumption of snow making here is about 20000 kwh, and the power consumption of race time maintenance and snow repair maintenance is about 100000 kwh. These are all supplied by green power, and in the past, more than 32 tons of standard coal had to be burned.
The competition in the Winter Olympic venues is in full swing, and the green electrification becomes light and heat, which is also cheering for the Winter Olympic athletes.
It is estimated that 1 kwh of green electricity can light a lighting pole for 40 seconds, light the main stage of the award square for 22 seconds, and power the electric heater of Cecep Solar Energy Co.Ltd(000591) inflatable tent for 30 minutes
In addition to these relatively easy to calculate projects, there are many electrical equipment, such as event timing and scoring, event broadcasting, etc., which have very high requirements for stable and reliable power. According to reports, the State Grid has completed the construction of the Winter Olympic power operation guarantee command center, improving the power supply reliability of the competition area to 99.999%.
Liu Yumin, director of the planning and Construction Department of the Beijing Organizing Committee for the Winter Olympic Games, recently introduced that by the end of the 2022 winter Paralympic Games, the Winter Olympic venues are expected to consume about 400 million kwh of green electricity, which can reduce the combustion of 128000 tons of standard coal and 320000 tons of carbon dioxide.
