Golmud "Leader": Ten years of hard -ending photovoltaic flat price online

In the past ten years, the Chinese photovoltaic industry has risen in the back of the hairpiece, and the total installed capacity and power generation of photovoltaic power generation have jumped in the world. While the rapid development of scale and technology, industrial development has gradually got rid of the dependence on related policies, and achieves historic leaps from the age of subsidy to affordable.

May 31, 2018 is undoubtedly the key point of this historical change. On this day, many national ministries and commissions jointly issued the "Notice on the Matters Related to photovoltaic power generation in 2018", and proposed to accelerate the decline of photovoltaic power generation subsidies and reduce subsidy intensity. Almost at the same time, a project that labels photovoltaic parity online and is called Golmu's "Leader", which has attracted attention in the industry ...

▲ Three Gorges Energy Golmu photovoltaic "Leader" project (Figures of the Three Gorges Energy)

Stubborn

Ten years of deep cultivation and casting

On April 22, 2018, when Dong Weiping saw the news of the "Leader" project of the bidding Gelmudu photovoltaic "leaders", he and his colleagues in the office could not help but scream. "Because of excitement, I feel incredible!" Recalling the scene four years ago, China Three Gorges New Energy (Group) Co., Ltd. (hereinafter referred to as "Three Gorges Energy") Dong Weiping's face was still difficult to cover up.

One of the "incredible" is the size of 20-30 MW each time before. This time, the five-watt-up project of Golmud's "Leaders" at that time was 500 MW. The second "incredible" is that the online electricity price of the winning project is only 0.316 yuan/kWh.

In 2018, the bidding of the photovoltaic power station in Haixi Prefecture in Qinghai was 0.55 yuan/kWh. Sanmao is one -six -six, lower than the current benchmarking electricity price 40%, and even 1 cents lower than the local coal power benchmarking electricity price -this is the first time that my country's photovoltaic electricity price is lower than the coal -fired electricity benchmarking electricity price.

Speaking of photovoltaic electricity prices, back to 2004, Germany took the lead in launching photovoltaic subsidy policies worldwide to promote the large -scale commercial application of photovoltaic power generation. Since then, countries have adopted subsidies to motivate their photovoltaic industry to develop rapidly. In 2018, domestic photovoltaic power generation generally access the Internet at the benchmark electricity price approved by the state. Among them, local coal power benchmarking electricity prices are settled by the provincial power grid by the provincial power grid, and the excess part will be subsidized through the National Renewable Energy Development Fund. Subsidies are important considerations for the output of many photovoltaic projects.

"At the time of winning the bid, such a low electricity price did cause a lot of sensation in the industry. The questioning came from all directions, and some even felt that we would abandon the bid." The affordable photovoltaic project under the cycle of lean operation can not only ensure reasonable returns, but also become a magic weapon for the sustainable development of the project. "

The distinctive competitive advantage and the confidence of the victory originated from the continuous accumulation of ten years.

At the end of 2011, the Three Gorges Group took the first step of the "Sunshine Three Gorges" from the vast Gobi Beach -the first phase of the Gelomu photovoltaic project was completed and put into operation. The project became the first photovoltaic project of the Three Gorges Group's grid -connected power generation. For many years, it is accompanied by the scorching sun and Gobi gravel, and the photovoltaic boards day and night are "species" on the Qinghai -Tibet Plateau.

"We understand the environment here and the climate here. In the past many years, we have made a lot of analysis of the light resources here. We have also accumulated rich experience in design, equipment selection and later operation and maintenance. Therefore On the Internet, confident, "Dong Weiping said.

Innovation drive

Treatment of cost reduction and efficiency and refining core capabilities

Knowing and knowing that, it is the first step in the Three Gorges Group's opening of the road of light -based price access.

"The photovoltaic industry has always been the industry where the" continuous technological change driving cost continues to decrease ". Technological innovation is the fundamental driving force to promote the realization of cheap Internet access in the photovoltaic industry." Cao Renxian, the chairman of the China Photovoltaic Industry Association Still from the system, the efficiency brought by technological innovation must be the main direction of the future. "

The "Leader" project of Gelmudu photovoltaic is done.

"During the design and construction of the project, we applied new technologies, new materials, and new equipment to reduce costs and improve efficiency." Hu Guowen, head of the Gelmatu photovoltaic "leader" project, told reporters. Walking in the park of the "Leader" project, you will hear a "buzz" sound of motor work from time to time. This is the sound of photovoltaic brackets that follow the sun. Compared with the traditional fixed bracket, these fixed -adjustable brackets and horizontal single -axis tracking brackets are used to allow the photovoltaic board to track the sun to the greatest extent. %, The cost of the system is reduced.

▲ Fixed adjustable bracket

▲ Horizontal single -axis tracking bracket

A piece of double -sided double -glass component replaces the traditional single -sided component, allowing the back of the light plate to use the light and the reflex light of the surrounding environment for the light and the surrounding environment. %, The cost of power has been reduced.

▲ Double -sided double glass components

Use the 1500V photovoltaic system to replace the traditional 1000V system. Under the same installed capacity, the demand for DC cable and DC convergence box is reduced by 1/3, and the higher system voltage effectively reduces equipment and line electrical loss, so that the system generates power generation efficiency efficiency Increasing nearly 1%, the cost dropped again.

A technology innovation made the Golmud "leaders" project "picking" production benefits a little.

On December 29, 2018, the "Leader" project officially connected to the first large -scale photovoltaic project in China.

▲ Three Gorges Energy Golmu photovoltaic "Leaders" project grid ceremony (Figure Figures of the Three Gorges Energy)

Lean operation and maintenance

High -efficiency management Create sustainable development model

On the basis of experience and technology, the on -site operation and maintenance team is still looking for the "good recipe" that further reduces cost reduction and efficiency.

"The accumulation clouds, convolution clouds, flight principles, drone regulations ... The theoretical test of my drone driver's license is almost the same as that of civil aviation!" The duty officer Jin Liang showed the drone driver's license in the mobile phone album Screenshot, "The previous inspection required a lot of manpower, and it was very time -consuming. Last year we bought inspection drones. With it, some regular inspections needed only me alone, such as abnormal component temperature, hot spots, etc. The failure can be seen at a glance, and it is faster and more accurate than artificially. "

▲ Duty officer operates drones for inspection

▲ Inspection drone monitoring screen

At present, the three photovoltaic projects, including the "Leaders", which the Three Gorges Group, have adopted the management model of "centralized management and unified operation and maintenance". Only a small amount of operation and maintenance personnel need to be arranged at the scene. Command scheduling, running data between power stations, economic indicators, etc. can conduct comprehensive comparative analysis, and personnel and materials can achieve unified management scheduling. On the one hand, this model promotes the clarity and refinement of operation and maintenance work, and on the other hand, it is conducive to giving full play to the advantages of individuals and teams, and greatly saving labor costs while improving operational management efficiency.

"Previously, in accordance with the configuration management regulations, these six projects need nearly 70 people, and now, as long as more than thirty." Hu Guowen said, while pointing at the comprehensive building behind him.

In the comprehensive building referred to by Hu Guowen, there is also a laboratory with an inconspicuous appearance. More than ten types of detection instruments and various shapes of various shapes are filled with this room.

"This is our oil test center, and it is the only part of our Three Gorges in Qinghai Province." Hu Guowen said, "This room can save us nearly 1.2 million yuan in testing costs every year."

Ladanjia, a Tibetan duty member who is working in the laboratory: "The insulation oil of our box transformer needs to be tested regularly. It could only be sent outside to do it. It cost more than 800 yuan for a chromatography analysis of a box. , Our project has 175 units, which costs more than 100,000 yuan each year. "Ladan Jiaga pointed to a row of instruments and continued," Now we not only test the instruments, but also cultivate a group of professional testing staff It can be completed independently, not only the expenses of our stations, but the insulation oil of other stations in the group can be sent here to test. "

Ladia also told reporters that the center is currently preparing to expand to further improve the detection capacity.

▲ oil test center

"The Gelmud 'Leader' project is a milestone in the history of my country's photovoltaic industry." Cao Renxian, the chairman of the China Photovoltaic Industry Association, commented. "It not only created a new demonstration sample for the National Energy Revolution, but also Development has a good leading significance, exploring the engineering construction and technical implementation plan that is more suitable for domestic affordable Internet access, leading the national photovoltaic power generation projects to enter a new era of affordable Internet access. "

Since the merger network power generation, the Golmud photovoltaic "leaders" project has produced more than 1,300 days, and the cumulative production of clean electricity has exceeded 2.6 billion kilowatt -hours. It has completed the target of power generation for three consecutive years and achieved profitability. "Our project is to provide a stage for high -efficiency products and advanced technology, promote the upgrading of the photovoltaic industry and the decline in cost, and help the competent authorities understand the room for electricity prices. Our success has allowed the industry to see that photovoltaic parity online is not 'Fangfang Ye Tan". It is also the meaning of 'leader'. "Dong Weiping said.

Throughout the ten -year development path, my country's photovoltaic power generation industry has gradually got rid of the dependence on subsidies, realizing the historic leap from the age of subsidy to the age of affordable, and is changing from auxiliary energy to the main energy. At present, the photovoltaic industry ushered in a new round of historic development opportunities. In 2030, carbon peaks are achieved, carbon neutralization in 2060, and build a new power system with new energy as the main body ... new strategic goals give the photovoltaic industry a greater greater the photovoltaic industry. Historical responsibilities have also made higher requirements. How to promote the continuous progress of technology, the continuous decline in cost, and the continuous improvement of efficiency, solve the problem of consumer proportions, technical stability, and industrial chain supply security, and truly achieve high -quality sustainable development is still the challenge facing the entire photovoltaic industry. As the first -line position of the new model and new technological practice, the Golmud photovoltaic "Leaders" project, it has accumulated the successful experience in various aspects such as technological innovation, quality control, cost control, and control operation and maintenance model. Construction provides an important reference basis. At the same time, it has also made due contributions to promoting the large -scale application of clean energy and promoting the comprehensive realization of non -subsidy and even low -cost market -oriented development.

Coordinating planning: Ma Guan Pu

Text: Chenglin Maggang Park Li Shiyu

Picture: Ma Guan Pu Li Shiyu Chenglin

Video camera: Li Shiyu Ma Guan Pu Chenglin

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