Renewable energy construction to speed up green development to add impetus

Since the beginning of this year, a number of major renewable energy projects have been vigorously promoted, and solid steps have been taken in the green and low-carbon development of energy.

The Maerblock Hydropower Station in Qinghai Province, located at an altitude of 3,300 meters above sea level, is busy. More than 3,600 workers have been working day and night to overcome the lack of oxygen on the plateau, and more than 87 percent of dam filling has been completed.

Kubuqi Desert, the world's largest "sand desert" wind power photovoltaic base with a total investment of more than 80 billion yuan is under construction, after completion, it can supply about 40 billion KWH of electricity to the Beijing-Tianjin-Hebei region every year;

In the southeast sea, the construction of the second phase of Liuao Offshore Wind Farm in Zhangpu, Fujian, with a site area of about 22.9 square kilometers, began, and the first batch of 16 MW and above large capacity offshore wind turbines was used.

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By the end of 2022, China's renewable energy installed capacity exceeded 1.2 billion kilowatts, historically surpassing the national coal power installed capacity. From January to April this year, the country's new installed capacity of wind power photovoltaic power generation was 62.51 million kilowatts, accounting for 74% of the country's new installed power generation capacity. At present, all regions and departments are coordinating secure energy supply and green and low-carbon development, and actively promoting renewable energy to enter a new stage of high-quality development.

The installed capacity has steadily expanded, and the industrial competitiveness has been continuously consolidated

In Yajiang County, Garze Tibetan Autonomous Prefecture, Sichuan Province, the 4600 meters above sea level Yalong River Kela photovoltaic power plant construction site, the booster station has fully entered the installation and commissioning, the builders are making final preparations for the mid-year production target. The world's largest water-light complementary power station has a construction area of more than 16 million square meters, equivalent to the size of more than 2,200 standard football fields.

According to Yang Zhiwei, project manager of Guotou Yalong River Hydropower Development Co., LTD., the project will generate an average of 2 billion KWH of electricity per year, save more than 600,000 tons of standard coal and reduce carbon dioxide emissions by more than 1.6 million tons. Through the connection of Lianghekou hydropower station, water and light can be complementary, and the randomness and volatility of photovoltaic power generation can be stabilized.

 Renewable energy is natural green energy. In 2022, China's renewable energy installed capacity steadily expanded, the new installed capacity of 152 million kilowatts, accounting for 76.2% of the country's new power generation capacity, has become the main body of new power installed capacity; The level of utilization has steadily increased, generating 2.7 trillion KWH of electricity, equivalent to reducing carbon dioxide emissions by about 2.26 billion tons.

In the first quarter of this year, the water energy utilization rate of the country's major river basins was 99.8%, the average utilization rate of wind power was 96.8%, and the average utilization rate of photovoltaic power generation was 98%.

Energy enterprises seize the opportunity of renewable energy development, and strengthen the planning of project construction: this year, the National Energy Group plans to complete and put into operation offshore wind power projects such as Bozhong in Shandong Province, Sheyang in Jiangsu Province, Xiangshan in Zhejiang Province, and a number of photovoltaic base projects such as Ningdong in Ningxia Province and Ganquanbao in Xinjiang Province. Huaneng Group plans to start more than 30 million kilowatts of new energy and invest more than 100 billion yuan... The relevant person in charge of the National Energy Administration introduced that this year to vigorously promote the construction of major renewable energy projects, wind power, solar power, hydropower installed capacity is expected to be 430 million kilowatts, 490 million kilowatts, 423 million kilowatts.

At the same time of large-scale development of renewable energy, technological innovation efforts continue to increase, and industrial competitiveness continues to consolidate.

The center of the wheel is 146 meters high, equivalent to a 50-story building; The diameter of the impeller is 252 meters, and the sweeping area is about the size of 7 football fields. The wind turbine rotates once, and the power generation can be used by a family of three for about 7 days. This year, China's self-developed 16 MW offshore wind turbines have been approved for use, which makes Wu Gang, chairman of Goldwind Technology involved in the research and development, proud.

"The 16 MW offshore wind turbine has overcome a series of key technical problems such as ultra-long flexible blades, localization of large spindle bearings and miniaturization of ultra-large capacity generators, setting a new record for the world's largest single capacity and largest impeller diameter." Wisco said that the company will continue to adhere to independent technological innovation to improve the stability and reliability of wind turbines.

Only innovation can be self-strengthening, in order to compete. At present, the focus of the global new energy industry has further shifted to China, and China's production of photovoltaic modules, wind turbines, gear boxes and other key components account for 70% of the global market share; The conversion efficiency of silicon heterojunction cells independently developed by Longi Green Energy, a photovoltaic enterprise, reached 26.81%, setting a world record; In 2022, equipment made in China will contribute more than 40% of the global carbon dioxide emission reduction from renewable energy.

The layout of development has been continuously improved, and new models and business forms have emerged

The sun shines on the south Taihang Mountains, and the blue photovoltaic curtain wall extends like a wave. Henan Huixian City Peizhai industrial Park, plant construction is in full swing. "After the plant is installed with photovoltaic curtain wall, it can generate about 330,000 KWH per year, saving electricity cost about 300,000 yuan, and the remaining electricity can bring additional income, which has attracted many enterprises to sign up." Huixian City Zhangcun township Party secretary Guo Dongwei introduced.

Make full use of mountain terrain, farmer roofs, factory buildings and other resources to promote distributed photovoltaic construction. It is expected that by the first half of this year, the number of household photovoltaic installations in Huixian City will exceed 20,000 households, and 150 industrial and commercial photovoltaic power plants.

Centralized and distributed development is carried out simultaneously, and the layout of renewable energy development is optimized.

"Big and strong", the construction of large-scale wind power photovoltaic bases focusing on deserts, Gobi and desert areas is progressing smoothly. As of April this year, the first batch of 97.05 million kilowatts of base projects have been fully started, the project grid work actively promoted, and strive to be completed and put into operation by the end of this year, the second batch of base projects have started construction, and the third batch of base projects have been issued and implemented.

"Small and beautiful", distributed development has become the main way of wind power photovoltaic development. On the roof of the building, the courtyard and the field, the fan whirls and the photovoltaic panel shines. In the first quarter of this year, 33.66 million kilowatts of new grid-connected photovoltaic installations were added, of which 18.13 million kilowatts of distributed photovoltaic power generation, accounting for more than 53%.

The relevant person in charge of the National Energy Administration said that at present, China is focusing on the desert, Gobi and desert areas, accelerating the construction of seven new energy bases on land such as the upper reaches of the Yellow River, Hexi Corridor and Yellow River. Promote the development and construction of the two major water-scenery comprehensive bases in Sichuan, Yunnan, Guizhou, Guangxi and Southeast Tibet; We will promote large-scale offshore development of offshore wind power and far-reaching offshore demonstration development.

New models and new business forms are emerging, and renewable energy application scenarios are integrated and innovative.

The construction site of the Three Gorges new generation grid friendly green power station demonstration project is in full swing in Ulanqab, Inner Mongolia. Under the photovoltaic panel, cold and drought tolerant plants such as alfalfa and Chinese leymus are planted, and the green development model of "power generation on the board and planting under the board" is taking shape.

"Photovoltaic panels can reduce surface water evaporation and increase vegetation growth rate. The first phase of the project will be completed and put into operation by the end of 2021, and the second and third phases are scheduled to be completed by the end of this year." Three Gorges energy construction management branch north construction management deputy director Zhang Xiaolong said.

In Qinghai, through the integration of "ecological photovoltaic + energy storage + heat storage", the State Power Investment has met the power supply and heating needs of more than 30,000 farmers and herdsmen in Guinan County. In Xinjiang, the SINOPEC Kuqa Green Hydrogen demonstration project has entered the sprint stage of production, and the annual output of green hydrogen can reach 20,000 tons using the advantages of local abundant solar energy resources. New models and new forms of business, such as photovoltaic + agriculture, photovoltaic desertification control, and hydrogen production from renewable energy sources, have formed a new situation of multi-energy complementarities, local conditions, and diversified integrated development.

The construction of power transmission channels has been accelerated, and the level of consumption has been effectively improved

Most of our country's scenic resources are distributed in the "three north" area, while the electricity load is mainly concentrated in the central and eastern and southern regions, and the cross-provincial transmission pressure is large; Coupled with the intermittent volatility of wind power and photovoltaic power generation, large-scale and high proportion access in the future will bring challenges to the smooth operation of the power system. Therefore, renewable energy must be developed on a large scale, but also a high level of consumption.

General Secretary Xi Jinping pointed out that it is necessary to increase efforts to plan and build a new energy supply and consumption system based on large solar power bases, supported by clean, efficient and advanced energy-saving coal power around them, and supported by stable, safe and reliable UHV transmission and transformation lines.

Construction of power transmission channels to help the "development" of new energy.

At present, the world's highest altitude UHV direct current transmission project - the Jinsha River upstream to Hubei ±800 kV UHV direct current transmission project is busy, after completion, it can transport nearly 40 billion KWH of clean electric energy from the Sichuan-Tibet Plateau to central China every year.

"The Sichuan-Tibet Plateau is rich in hydropower and new energy resources with huge reserves. In the next 20 years, large hydropower bases such as the Jinsha River and Lancang River and large-scale photovoltaic bases around them will be developed and built one after another, with a total installed capacity of more than 100 million kilowatts." State Grid Hubei electric power deputy general manager Zhou Xinfeng introduced. As the first UHV DC project to enter the hinterland of the Sichuan-Tibet Plateau, the Jinshang-Hubei project can replace more than 17 million tons of coal every year, reduce about 34 million tons of carbon dioxide emissions, and will significantly increase the proportion of green electricity in central China.

Sichuan-chongqing 1000 kV UHV AC project site equipment roar, after the completion of the project, China's southwest grid main grid voltage level will be raised from 500 kV to 1000 kV, can transport more than 35 billion KWH of clean energy per year; Zhumadian - Wuhan 1000 kV UHV AC project is steadily advancing, which will help the large-scale transmission of clean energy in the west and north to meet the rapid growth of electricity demand in Central China... The construction of transmission channels has been accelerated, effectively improving the consumption level of renewable energy power.

Promote the construction of energy storage and promote the "good use" of new energy.

Nanning, Guangxi, the "14th Five-Year Plan" period in South China's first pumped storage power station to step up construction. "At present, the excavation of the second floor of the underground plant has been completed. It is expected that the excavation and support of the plant will be completed by the end of this year, and the installation of mechanical and electrical equipment will begin." Southern network energy storage company engineering construction management branch engineering department manager Liu Cao said.

In 2022, the construction of pumped storage capacity in China will accelerate significantly. The country newly approved 48 pumped storage projects, installed capacity of 68.9 million kilowatts, more than the "13th Five-Year" period of all approved scale, the year of new production of 8.8 million kilowatts, a record high. This year, the State Grid plans to start construction of five more pumped storage power stations and put four into operation. China Southern Power Grid will continue to accelerate the construction of four pumped storage power stations in Nanning, Meizhou Phase II, Zhaoqing Langjiang and Huizhou Zhongdong.

The growth of new energy storage installations such as lithium-ion battery energy storage, compressed air energy storage, and liquid flow battery energy storage continues to accelerate. By the end of 2022, the installed capacity of new energy storage projects in China had reached 8.7 million kilowatts, an increase of more than 110% over the end of 2021. The relevant person in charge of the National Energy Administration introduced that at present and in the next period, it will speed up the peaking capacity construction of pumped storage, peak gas power, new energy storage and other power systems, and vigorously improve the flexibility of residential and industrial and commercial power load, providing strong support for the development of wind power and photovoltaic.

Low-carbon energy development concerns the future of mankind. China's renewable energy development is in a promising period of strategic opportunities, in-depth implementation of the new strategy of energy security, unswervingly promote the large-scale, high-proportion, market-oriented, high-quality development of renewable energy, the vivid picture of a beautiful China is slowly spreading.