General Secretary Xi Jinping emphasized: “Accelerate green technological innovation and the promotion and application of advanced green technologies, and strengthen green manufacturingZelanian sugar Building industry, developing green service industry, and strengthening green energy industry.”
As an important component of green energy, photovoltaics are booming, and my country’s newly installed photovoltaic capacity has ranked first in the world for many years in a row. Today, China not only has Newzealand Sugar a complete photovoltaic industry chain and technology, but also has the world’s largest photovoltaic power generation scale.
What is the specific situation of the downstream application links of photovoltaics? How Zelanian Escort can achieve greater benefits and contribute to green development? Reporters recently visited the mountainous areas of northern Yunnan to decode the planning, construction and future prospects of Pengpai Green Power.
——Editor
In the Yunnan-Guizhou Plateau, deep valleys and mountains, under the sunlight, photovoltaic panels spread out like fish scales shine brightly.
With an inclination of 24 degrees and as much as 540,000 square meters, in the northeast of Sayingpan Town, Luquan Yi and Miao Autonomous County, more than 130 kilometers north of Kunming, Yunnan, the Sayong Mountain 250 MW centralized photovoltaic power station converts the sun’s energy into Convert it into clean energy and transport it to factories, hospitals, residential areas…
Sayongshan Photovoltaic Power Station is the largest single photovoltaic power generation project in Yunnan Province, and it is also the local “8+3” new energy source. The first filing item in the project. In 2023, the new grid-connected capacity of Yunnan JiNZ Escorts Chinese-style photovoltaic power generation will reach 14.407 million kilowatts, ranking first in the country.
More than 100 years ago Zelanian Escort, the “photovoltaic effect” was accidentally discovered in an experiment. Today, photovoltaic power plants are spread across five continents. Among them, centralized photovoltaic power stations occupy the mainstream position Zelanian sugar because they can be connected to high-voltage transmission systems to supply long-distance loads. In Lucuansa Yongshan, Yunnan, a 250-megawatt centralized photovoltaic power station has been connected to the grid for more than a year to generate electricity.The capacity exceeds 340 million kilowatt hours. How to plan and construct this power station and how to achieve comprehensive benefits? What are the prospects for photovoltaic applications? The reporter conducted on-site research.
Planning
Accurate site selection, guaranteed by multiple factors
Exploring photovoltaics among the mountains The road to the power station is not easy. After wandering for several hours, we finally reached the top of Zelanian sugar mountain, and suddenly saw the blue sky and white clouds in front of us. Below Zelanian sugar, there are both spectacular large photovoltaic arrays and scattered photovoltaic panels.
Why choose to build large-scale photovoltaic power stations in mountains? Why are photovoltaic arrays distributed irregularly? A series of questions remain to be answered.
“Although it is in the mountains, due to the high altitude and less obstruction, the lighting conditions are more superiorNZ Escorts, the power station year The average full-load utilization hours are more than 1,300 hours,” said Wang Weichuan, deputy director of the Luquan County Development and Reform Bureau.
“This project consists of 5 plots, covering a total area of approximately 5,235 acres.” Xiang Donghui, deputy general manager of the investor Huadian (Yunnan) New Energy Power Generation Co., Ltd., introduced that the state’s commitment to photovoltaic There are strict policy requirements for land use. The initial site selection must be as accurate as possible to the installation location of each photovoltaic panel. The design of Zelanian sugar is very difficult.
“Through multiple procedures such as pattern inquiry and on-site inspection, we Zelanian sugar More than 5,000 acres of land were finally determined within the project. Xiang Donghui said that site selection is the first step in building a photovoltaic power station. This not only requires comprehensive consideration of the orientation of the photovoltaic panels, topography and good grid access, but also avoids the “three.” Factors such as “area three lines”, cultivated land, arbor forests, natural shrubs, nut oil tea gardens, minerals, etc. have also resulted in the irregular distribution of photovoltaic arrays.
What will be the consequences if the site selection is not accurate enough?
“It will increase the amount of road and power collection line construction, thereby increasing project investment, making it difficult for some projects to meet industry income requirements.” said Zhang Jian, professional chief engineer of the New Energy and Electric Power Engineering Institute of China Power Construction Kunming Institute , we need to strive for excellence when selecting project sites, and try to choose sites with concentrated plots and better conditions.
In order to find a site that meets the requirements, the project team conducted multiple on-site surveys in the mountains. “Once, my team members and I climbed to the top of the mountain for inspection. We were suddenly hit by heavy rain and shivered from the cold. Fortunately, we found a cowshed and were able to make a fire to keep warm.” Huadianlu advised new energy developmentNZ Escorts Co., Ltd. Deputy General Manager Long Pengxue said. The blue road leads to the mountains and forests, and a series of footprints reveal the original appearance of the photovoltaic power station.
Now that we have land, where does the money come from? After all, a power station requires a large investment and a long payback period.
In the early stages of construction, project funding was a big issue. As a green energy project, photovoltaics is a key area of financial support for green and low-carbon development. This project became the first batch of photovoltaic projects under the “carbon emission reduction linked” innovative model of Industrial Bank Kunming Branch. A total of 920 million yuan of loans were approved for the project, with a term of Up to 15 years.
Construction
Innovative technology to improve unit output
Climb high and overlook the vast Sa Yong Mountain Rows of photovoltaic panels fill the gaps between mountains, forests and fields, extending over the ridge into the distanceSugar Daddy, quietly absorbing the sun of energy.
Constructing mountain photovoltaic projects is difficult and costly due to complex terrain conditions and irregular and scattered usable areas. How to save land and improve power generation efficiency during the construction process?
The construction team introduced innovative engineering techniques. “You see, this is the flexible photovoltaic bracket we designed. It does not require Zelanian Escort cement piles, only steel strands and lock structures. Fixed photovoltaic panels.” Yang Hongpeng, manager of the project’s EPC (engineering general contracting model), pointed to the photovoltaic modules on the triangular truss in front of him and said that the team is constantly exploring the optimal layout plan for the mountainous areas with poor local terrain conditions and good lighting resources. A photovoltaic flexible bracket project with a span of 42 meters was implemented.
With flexible photovoltaic brackets, the gaps between components are reduced, enabling high-density arrangement of photovoltaic arrays. “Compared with fixed brackets, the land use index per megawatt for flexible brackets is reduced by 1.45 acres, and the amount of investment per kilowatt has also dropped. ” Yang Hongpeng introduced that this technology has been promoted and used in the construction of many other mountain photovoltaic projects in Yunnan, greatly improving land use efficiency.
Further increase power generation within limited landEfficiency and configuration of related equipment are key. The booster station is the core equipment of the photovoltaic power station. It boosts the electric energy generated by the power station to high voltage for transmission to the power grid. “Zelanian EscortThrough optimized design, we have centrally arranged the 220 kV booster station in Lot 2, which is conducive to shortening the single-turn collection The length of the electric line will reduce power loss,” Xiang Donghui said.
Between the mountains from Shengfa Village in Sayingpan Town to Zhongping Town, the grid connection project of the Sayong Mountain Photovoltaic Power Station has also been completed. “This line Zelanian sugar has a total length of over 24 kilometers and has 79 base towers. It can connect the generated energy to 220 kV. Screen substation.” Chen Wei, grid connection engineering manager of Yunnan Kunming Power Supply Bureau of China Southern Power Grid, said that the use of new technologies such as drone three-dimensional laser scanning modeling ensured that the project was put into production on schedule.
Increase efficiency
Adapt measures to local conditions and give full play to comprehensive benefits
“There are 540,000 photovoltaic panels here. The power generated by the panels. This iron tower is the boundary between the photovoltaic power station and the China Southern Power Grid. The generated energy can only be connected to the large power grid through the iron tower. “Enter the photovoltaic power station booster station located on the mountainsideNewzealand Sugar, webmaster Zhou Quansheng said that the green electricity generated by the power station can be fully connected to the Internet. According to relevant policies, assuming that the life of a photovoltaic power station is 25 years, the construction cost can be recovered in about 15 years.
In addition to its own input-output account, the comprehensive benefit account of this power station to surrounding areas is also becoming increasingly clear.
“We plan to plant 400 acres each of Polygonatum sibiricum and Bletilla striata in plot No. 5. The town government entrusts a professional cooperative to carry out planting and operation.” Wang Haibin, deputy mayor of Sayingpan Town, said that the cooperative can provide technical and sales guidance. , nearby villagers can participate in management and maintenance work such as planting and weeding to increase income.
These measures that benefit the people can be promoted, thanks to the improvement of agricultural NZ Escorts infrastructure under the complementarity of agriculture and light. promote. “According to the development agreement, the company invested in improving the agricultural water conditions on the mountain and supporting the complementation of agriculture and light.” Xiang Donghui introduced that in addition to leveling the land in the early stage, Zelanian Escort Irrigation facilities such as dams have also been built, and surrounding roads have been hardened or repaired, increasing the annual net income of 300 nearby farmers involved in the land by 3,000 yuan.Yuan and above.
In Shengfa Village, Sayingpan Town, village party secretary Wang Tianzhi calculated an account for reporters – Shengfa Village has a total of more than 4,600 acres of photovoltaic land leased to several photovoltaic companies including Huadian. For the project, villagers can receive a rent of about 500 yuan per mu. In the agro-photovoltaic complementary project, nearby villagers participate in planting crops and also gain profits.
“In 2020, the collective income of our village was only 50,000 yuan. With the arrival of the photovoltaic project, it has now exceeded more than 2 million yuan.” Wang Tianzhi said that when the power station was built, many villagers participated in the construction Earn labor income; after the completion of the project, more than a dozen villagers have found employment at home, working in security, logistics and other jobs at the power station.
Wang Tianfu was once a poor household in the village. His family of four used to live in a tile-roofed house, but now they have moved into a three-story building. “I am now patrolling a power station, and I am paid 2,400 yuan a month. I also get 20,000 yuan in land transfer income every year. The days are getting better and better.”
Walking on the mountain trails, Kelsang Flowers cover the roadside, and Huashan pine seedlings grow tenaciously beside the gravel. In addition to social benefits, photovoltaic power stations also exert huge ecological benefits, reducing carbon dioxide emissions by more than 300,000 tons every year; the Zelanian sugar project is also implemented simultaneously Through ecological restoration, the surrounding ecological environment has been significantly improved. “In addition to planting pasture, we also plant plants that promote the restoration of the natural environment in areas that do not have agricultural planting conditions. While restoring the ecology, the landscape has also been further improved.” Long Pengxue said. Pasture seeds are sown under the photovoltaic panels, and rhododendrons and Huashan pines are planted in rocky desert areas… During the peak period, more than 100 villagers around the power station are engaged in ecological restoration, and each person can earn 100 yuan in labor fees per day.
For the local government, this power station brings win-win opportunities. “In terms of taxation, the project is expected to have a total value-added tax of about 260 million yuan and a total income tax of about 190 million yuan in 25 years. It will increase the annual industrial output value of Luquan County by about 130 million yuan.” Wang Weichuan said that creating a beautiful scenery in the lower reaches of the Jinsha River in Luquan In terms of the national demonstration base for water Newzealand Sugar, the power station also has a leading effect, effectively driving the adjustment of the local industrial structure.
Promote
Innovative technology and release surging green energy
The reporter came to Huadian Yunnan NewNZ EscortsIn the energy centralized control center, the equipment status of the power plant flashed on the large digital screen. Xiang Donghui introduced that according to the company’s current installed scale of wind and solar power, more than 200 operating personnel and more than 480 maintenance personnel are needed; completelyAfter adopting the intelligent management and control mode, only 40 operating personnel and 183 maintenance personnel are needed, which can effectively reduce the operation and maintenance costs of photovoltaic power stations and improve the labor productivity of all employees.
In recent years, with the expansion of photovoltaic power plant construction scale, the need to reduce operation and maintenance costs has become more urgent. By applying more information technology to the energy field, remote centralized control and unattended operation are becoming Sugar Daddy centralized photovoltaic power station production management. New model.
Zeng Jianping, deputy secretary-general of the Strategic Advisory Committee for the Construction of a National Manufacturing Power, believes that the photovoltaic industry is a typical field where new energy and information technology are highly integrated. Currently, more and more new energy projects, including photovoltaic power stations, are implementing the application of smart technologies.
In January this year, in order to implement the “Smart Photovoltaic Industry Innovation and Development Action Plan (2021-2025)”, the Ministry of Industry and Information Technology released the list of the fourth batch of smart photovoltaic pilot enterprises and projects, Zelanian Escort Promote the acceleration of intelligent manufacturing, intelligent applications, intelligent operation and maintenance, and intelligent dispatching, and comprehensively improve the quality and efficiency of the development of the photovoltaic industry.
In addition to the gradual improvement in the level of smart photovoltaic applications, the trend of cross-border integration of photovoltaic power generation in my country has become more obvious in recent yearsZelanian Escort Show.
Walking into the Luquan County Industrial Park, the reporter saw rows of dark blue photovoltaic panels neatly installed on the roofs of multiple factories. “The power generated by the project can be used by food processing and other enterprises in the park. Currently, the proportion of self-use reaches 40%, and the excess power can be connected to the Internet.” Huang Kuodong, project manager of Luquan Suifa New Energy Co., Ltd. said that the average annual power generation of the distributed photovoltaic project can reach 2.12 million kilowatt hours.
In addition to “photovoltaic + industrial park”, the “photovoltaic +” comprehensive development model in multiple scenarios will continue to promote the cross-border integrated development of photovoltaics.
In terms of distributed photovoltaics, various regions are actively exploring new space for industrial development. For example, Beijing City has proposed that the photovoltaic coverage rate on the roofs of new public institutional buildings and parks should not be less than 50%; Shanghai City plans that from 2023 to 2025, the city’s new residential buildings will have a photovoltaic scale of more than 100,000 kilowatts; in addition, Jiangsu and other places encourage photovoltaic applications in transportation, Expanded applications in communications, data centers and other fields.
As for centralized photovoltaics, as land management becomes more stringent, there is hope and hope. At the same time, he also suddenly discovered something, that is, he was attracted to her unknowingly. Otherwise, how could there be greed and desire to develop the “photovoltaic +” model of composite photovoltaic power generation projects that has become a trend. Operators can develop agriculture, forestry, and Newzealand SugarPastoral, fishery and photovoltaic power generation business, such as agricultural and photovoltaic complementary, forest and photovoltaic complementary, fishery and photovoltaic complementary, animal husbandryNewzealand SugarCompound photovoltaic projects in multiple scenarios such as light complementation to increase comprehensive income.
Currently, our country is building a new future in which the proportion of new energy is gradually increasing, which has changed Mother’s fate. Is it time to regret it? Type of power system continues to promote the energy revolution, which also opens up broad possibilities for photovoltaic downstream applicationsSugar Daddy Space. For example, various regions are exploring photovoltaic hydrogen production, ammonia production, methanol production and other models to expand the on-site consumption of green electricity.
Recently, the National Energy Administration issued a notice to actively support new energy + energy storage. “As the downstream applications of photovoltaics become increasingly abundant and their proportion continues to increase, the deployment of energy storage systems will greatly enhance the flexibility of photovoltaic power generation and reduce the peak load on the power grid. Xiao Gang, a professor at the School of Energy Engineering of Zhejiang University, believes that in order to further expand the development space of photovoltaic applications, it is necessary to encourage the deployment of energy storage facilities on the power generation side, grid side, and consumer side, so that new energy can better serve the national development strategy and better serve the people. A better life for the masses.
Standing at the foot of Sayong Mountain, looking up, the photovoltaic array is like a field where sunlight “seeds” are spread, and green electricity is constantly growing here. It also lights up the neon lights of the city and continues to contribute to green and low-carbon development. In the past 30 years, the entire photovoltaic industry chain has embraced the power of digitalization and continued to grow and mature with the help of policies and industry dividends; in the future, with the development of photovoltaic applications. With further expansion, photovoltaic modules will also appear in tidal flats, fish ponds, stations, and mines… The photovoltaic industry will Newzealand Sugar grow into a A towering tree lights up a better life and provides more opportunities and momentum for green and low-carbon development.