Speeding up the planning and construction of large-scale wind power photovoltaic base projects in deserts, Gobi and desert areas
Western Green Power contributes to the "dual carbon" goal
In October, Jiuquan, Gansu, on the ancient Hexi Corridor, rows of white windmill blades swirled, and silver photovoltaic panels gleamed, forming a new desert landscape.
This is the first ten million kilowatt-level wind power base and one million kilowatt-level solar power generation base planned and constructed by the state.
As a city where the amount of wind energy that can be developed accounts for one-seventh of the country's total, and the average annual sunshine hours are more than 3,300 hours, Jiuquan is accelerating the development of new energy industry, and the construction of the second tens of millions of kilowatt-level wind power base construction project has also started.
Large-scale development of renewable energy is an important safeguard measure for China to fulfill its promise of "carbon peak and carbon neutrality".
On October 12, President Xi Jinping pointed out at the leaders’ summit of the 15th Conference of the Parties to the Convention on Biological Diversity that China will continue to advance the adjustment of its industrial and energy structure, and vigorously develop renewable energy. The desert area is speeding up the planning and construction of large-scale wind power photovoltaic base projects, and the first phase of the project with an installed capacity of about 100 million kilowatts has been started in an orderly manner in the near future.
Compared with the long preparation and construction period of clean energy such as nuclear power and hydropower, wind and solar energy is the most convenient green energy.
In recent years, China's wind power photovoltaic industry has entered a stage of accelerated growth.
According to data released by the National Energy Administration, wind power will account for 34.6% of the new installed capacity of power sources nationwide in 2020, and solar power will account for 24.1%.
The new wind power and solar power generation totaled 120 million kilowatts, accounting for about 63%, and they became the main force in the growth of China's power supply.
It is expected that after 2030, wind energy and solar energy will become the main non-fossil energy sources.
1 160,000 mu of desertified land rejuvenates
Green energy on the east bank of the Yellow River
From Yinchuan all the way to the east, after crossing the Yellow River, you will see this "ocean of light": thousands of blue solar panels move by the light like sunflowers, under the sparkling sea, dotted with stripes. The red and green "satin ribbon" is the wolfberry forest with red fruits.
This is Ningxia Baofeng Agricultural and Solar Integrated Photovoltaic Power Station-the world's largest single agricultural and photovoltaic complementary power station.
The power station adopts the new green industry development model of "power generation on the board and medlar planting under the board", which brings vitality to the 160,000 mu of desertified land on the east bank of the Yellow River in Yinchuan.
The photovoltaic power station adopts the world's leading horizontal single-axis automatic tracking technology with inclination to maximize solar energy absorption. As of the end of last year, compared with traditional thermal power, it has reduced carbon dioxide emissions by a total of 2.047 million tons, which is equivalent to planting more than 89 million trees.
Some research institutions have released such a set of data: the solar energy reaching the surface every second is 800,000 kilowatts. If 0.1% of this is converted into electric energy, and the conversion rate is 5%, the annual power generation is 40 times the world energy consumption. .
Resource and environmental benefits are undoubtedly an important reason for China to vigorously promote the development of wind power and photovoltaics.
In Jiuquan City, Gansu Province, this desert capital was once filled with yellow sand and scorching sun. In the past, coal was mainly used for energy consumption, which caused environmental pollution on the one hand, and wasted the abundant local scenery resources on the other.
In recent years, Jiuquan has vigorously developed CSP projects, changing from a traditional energy city to a new energy city, and embarking on a path of green development.
Data show that as of June this year, the city has built a total of 10.45 million kilowatts of grid-connected wind power installed capacity and 2.86 million kilowatts of photovoltaic installed capacity. The cumulative power generation of new energy reached 110 billion kWh, which is equivalent to saving 33 million tons of standard coal and reducing carbon dioxide. 100 million tons, 340,000 tons of sulfur dioxide, 170,000 tons of nitrogen oxides.
The most intuitive feeling of the local people is that the sky is bluer.
Golmud City, Haixi Prefecture, Qinghai Province is located in the Sanjiangyuan Nature Reserve. The fragile ecology makes the transition of green power self-evident.
In September 2019, with the 50,000-kilowatt solar thermal project being connected to the grid for power generation, the country's first batch of multi-energy complementary integration optimization demonstration projects were completed here.
The total installed capacity of the project is 700,000 kilowatts, including 200,000 kilowatts of photovoltaic projects, 400,000 kilowatts of wind power projects, 50,000 kilowatts of solar thermal power generation projects and 50,000 kilowatts of energy storage systems.
"Photovoltaic and wind power are the main power output, while solar thermal and energy storage power stations are used as joint regulation. When photovoltaic and wind power enter the trough period, thermal energy and battery energy storage are used to supplement power generation. Deep integration of multiple methods to achieve stable power supply "Engineering operation and maintenance company-China Greenfa Qinghai New Energy Company Secretary of the Party Committee and Chairman Qiang Tongbo said that at present, the annual power generation capacity of the project is about 1,262.5 billion kilowatt-hours, which can save about 405,000 tons of standard coal each year, which will be effective. Reduce air pollution and promote Qinghai to fully realize the supply of clean energy.
Since 2017, Qinghai has successively launched the "Green Power 7th, 9th, 15th, 31st" and "Sanjiangyuan Green Power Hundred Days" activities, continuously setting the world record of 100% clean energy power supply.
According to the "Qinghai Action Plan for Building a National Clean Energy Industry Highland" recently released, Qinghai will fully build a new power system with clean energy as the main body in 2030, and basically build a zero-carbon power grid.
2 Electricity and heating power production and supply account for more than half of Hami's industrial added value
The secret of income generation hidden in the sun
Hami, Xinjiang, a city famous all over the country for cantaloupe.
The secret of sweet fruit here is hidden in the sun-Hami's annual total solar radiation reaches 6397.35 MJ/m2, ranking first in Xinjiang.
Adequate sunshine not only created cantaloupe, but also created the photovoltaic industry.
The Hami Shichengzi Photovoltaic Industrial Park is currently the largest photovoltaic demonstration park in Xinjiang with the largest monomer scale and the most comprehensive photovoltaic module types. There are dozens of solar energy companies that have settled in and connected to the grid with 790,000 kilowatts and an annual power generation of 1.3 billion kilowatt-hours. The above is one of the important supporting power sources for Xinjiang Power’s export.
The photovoltaic industry has greatly promoted the development of the local economy. Zhang Hui, deputy director of the Hami City Development and Reform Commission, said that last year, Hami City’s electricity and heating power production and supply industry accounted for 52.34% of the industrial added value.
The power industry has become a pillar industry for the development of Hami's industrial economy.
China Huadian Group Co., Ltd. is the earliest construction enterprise engaged in wind power and photovoltaic new energy projects in Hami.
In the past, Huadian’s main business was in traditional energy. As the national energy policy began to lean towards renewable energy, the development of traditional thermal power was declining.
In recent years, enterprises have accelerated their transformation and began to intensively invest in new energy projects.
New energy not only creates new growth points for enterprises, but also drives local people's income.
According to the person in charge of Huadian Xinjiang Branch, the photovoltaic poverty alleviation power station invested and constructed by the group in Bayinkuruti Village can bring 700,000 yuan of income to the village collective each year; "Banks" can save 90,000 yuan in electricity bills for the village collective each year.
Chengguan Village is a suburban village in Subei Mongolian Autonomous County (hereinafter referred to as Subei County) in Jiuquan City.
In the past, due to the lack of income sources, most of the villagers went out to work, making this a "empty village".
Ten villages and nine empty villages, the collective income of the villages were single, and the foundation was weak, which was once a common problem that plagued most villages and towns in Subei County.
Until 2019, the county selected three villages, including Chengguan Village, as a pilot, and built rooftop photovoltaic power generation projects by means of self-financing and government investment by the township, achieving the goal of generating 20,000-30,000 yuan per village in one fell swoop. .
"Small area, low cost, quick results, and stable income." Zhao Guojun, secretary of the Party branch of Chengguancun, spoke full of praise when talking about photovoltaic power generation.
Now, as soon as he is free, he takes everyone to polish the photovoltaic panels on the roof of the village party and mass service center.
"This can generate a little more electricity." Zhao Guojun said that this 37-kilowatt photovoltaic panel has now accumulated more than 9,000 kWh of electricity.
The success of the pilot has allowed rooftop photovoltaics to be promoted throughout the county. In recent years, the county has built rooftop photovoltaic power generation projects in 4 townships and 26 villages, revitalizing the idle light resources in the past.
According to the relevant person in charge of the Subei County Party Committee, the project can increase the income of the village-level collective economy by an average of 25,000 yuan per year.
Jinta County, located in the northeast of Subei County, is currently on the "fast lane" of photovoltaic industry development relying on its significant advantages in light.
As one of the seven million-kilowatt photovoltaic bases in Gansu Province, Jinta County has built a photovoltaic grid-connected power generation project of 578 MW.
Xu Zhijian, deputy director of the County Development and Reform Bureau, introduced: “The county’s power generation in the first half of this year was 400 million kilowatt-hours and achieved an operating income of 206 million yuan.” “The roof frame has a blue board, and there are more gold pots in the house.” The locals vividly refer to photovoltaic revenue as "sunshine revenue."
3 Intelligent inspection shortens 2 months of work to 20 minutes
Fusion of energy flow and information flow
In Fengjigou Township, Yanchi County, Ningxia Hui Autonomous Region, the field in late autumn is as vast as the sky.
In the long sky, the wind turbine tower of a 100,000-kilowatt smart wind farm stands upright in the wind, like a white forest.
At this moment, in the centralized control center in Lanzhou, Gansu, the staff are monitoring the wind farm remotely.
The operator clicks the mouse, real-time power generation, fan running status and other data are all displayed on the big screen.
Such a centralized control center can realize centralized control of several or even dozens of stations.
Like many domestic industries, in recent years, digitalization and intelligence have also become the development trend of new renewable energy sources such as wind power.
"The integration of energy flow and information flow" effectively improves the stability and power generation efficiency of the power station, and provides a path for solving the pain points of traditional new energy plants such as "equipment scattered and difficult to centralized management" and "high on-site operation and maintenance costs".
"A wind farm, hundreds of wind turbines, scattered everywhere, relying on people to monitor and manage, it is very difficult." Luneng New Energy Co., Ltd. Gansu Branch Ningxia Yanchi Wind Farm Deputy Director Gao Haibo introduced, "Yanchi Wind Farm from the design At the beginning, it was positioned as a "intelligent type". Relying on sensing equipment and control systems, wind farms have human-like self-awareness and independent analysis capabilities, realizing the automation of wind turbine control."
"There is a nacelle behind our wind turbine blades, and the top of the nacelle is equipped with a lidar. It can capture extreme wind conditions in real time, such as gusts and wind shear, and respond in advance; it can also accurately detect the wake information of the front unit to optimize the unit. The impact of the wake current.” When mentioning the intelligent technology of wind farms, Gao Haibo is a treasure, “The energy nest system can sense the external environment and the working conditions of the wind turbines, and intelligently control the power generation of the wind turbines on the whole site. With it, the power generation of the whole site has increased by 1.8%- 3%."
In addition to improving the intelligence of equipment, an important change in the smart electric field is to shift from manual decision-making to smart decision-making, and from empirical control to refined management.
In Yanchi Wind Farm, the equipment health management system establishes a fault warning model through algorithm analysis, which can detect potential problems and abnormal working conditions of large components during the operation of the unit in advance, and reduce power station losses.
The reporter found that with the rising popularity of the domestic new energy industry, many digital technology and smart technology companies have launched smart electric field product solutions.
"The operation of large-scale photovoltaic power plants is very difficult. The traditional method is that a dedicated team brings special instruments to the power station for operation and maintenance. The efficiency is relatively low. We use AI algorithms to detect current and voltage, and it will soon be possible. Accurately determine which string of photovoltaic panels has a problem in a photovoltaic power station.” At the digital energy media communication meeting last month, Fang Liangzhou, vice president of Huawei Digital Energy Technology Co., Ltd., introduced Huawei’s technology applications in the field of photovoltaic clean power generation.
The influx of more and more intelligent technologies has greatly improved the operation and maintenance efficiency of domestic photovoltaic power plants.
The 100,000-kilowatt photovoltaic power station in Jiajiagou, Zuoyun County, Datong City, Shanxi Province, with a power station of 5,017 acres, and more than 380,000 solar panels requires only 15 operation and maintenance personnel.
In Gonghe County, Qinghai Province, the 2.2 GW photovoltaic project relied on the intelligent diagnosis solution to shorten the 2-month operation and maintenance inspection work to only 20 minutes.
Our reporter Wang Yajing