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my country's photovoltaic products and grid-connected standards will be upgraded

my country's photovoltaic products and grid-connected standards will be upgraded

(Summary description)For photovoltaic technologies and products at different development stages, differentiated market access standards are adopted; simplified grid-connected measures such as no mandatory requirement for optical fiber communication, no low voltage ride-through, and no grid-connected detection are taken to ensure the development of distributed photovoltaics Smooth grid connection.

my country's photovoltaic products and grid-connected standards will be upgraded

(Summary description)For photovoltaic technologies and products at different development stages, differentiated market access standards are adopted; simplified grid-connected measures such as no mandatory requirement for optical fiber communication, no low voltage ride-through, and no grid-connected detection are taken to ensure the development of distributed photovoltaics Smooth grid connection.

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For photovoltaic technologies and products at different development stages, differentiated market access standards are adopted; simplified grid-connected measures such as no mandatory requirement for optical fiber communication, no low voltage ride-through, and no grid-connected detection are taken to ensure the development of distributed photovoltaics Smooth grid connection. Entering June, new policies in the photovoltaic industry have been launched frequently, and the industry's overall technology upgrade is slow and grid-connected technical standards are lacking in the development of chronic diseases. Recently, the National Energy Administration, the Ministry of Industry and Information Technology, and the CNCA jointly issued the "Opinions on Promoting the Application of Advanced Photovoltaic Technology Products and Industrial Upgrading" (hereinafter referred to as the "Opinions"). In addition, the "Research on Key Technical Standards for Grid-connected Photovoltaic Power Generation" also passed the acceptance check in early June. Starting from the "manufacturing" and "application" markets, my country's photovoltaic technology products and grid-connected access standards will be upgraded.

"The scale of my country's photovoltaic industry ranks first in the world, but behind this halo is the benefits of scale, not technology and quality. If my country's photovoltaic industry still plays the role of a'world processing factory', the future will be unsustainable. "In an interview with the author, Meng Xiangan, vice chairman of the China Renewable Energy Society, said that my country’s photovoltaic technology product applications and industries urgently need to be upgraded, which is already a “must do” thing. The establishment of the cyclical progressive mechanism for the market access of photovoltaic products means that this will be a continuous and long-term knock-out competition for the photovoltaic industry.

The first round of standards is not high and will continue to be cyclical in the future

In terms of market access standards for photovoltaic products, the "Opinions" put forward quantitative standards for the two major indicators of photovoltaic conversion efficiency and attenuation rate. Among them, photovoltaic modules newly purchased for photovoltaic power generation projects should meet the requirements of the relevant product technical indicators of the Ministry of Industry and Information Technology "Photovoltaic Manufacturing Industry Standard Conditions" (2015 Edition), such as the photoelectric conversion efficiency of polycrystalline silicon cell modules and monocrystalline silicon cell modules. Not less than 15.5% and 16%, and the photoelectric conversion efficiency of high-power concentrating photovoltaic modules is not less than 28%.

The data shows that the photoelectric conversion efficiency of monocrystalline silicon cells in large-scale industrial production in my country is about 19%, and the photoelectric conversion efficiency of polycrystalline silicon cells is about 18%. "The conversion efficiency of modules has dropped by about 2% on the basis of the above-mentioned battery data. It is not difficult to see that the'threshold' proposed in the first round of the "Opinions" is not high, and my country's photovoltaic manufacturing backbone enterprises can generally meet the standards." Meng Xiangan said.

In order to further enhance the awareness of relevant enterprises to establish technological advantages, the "Opinions" also clarified that the National Energy Administration will arrange a special market scale to implement the "leader" plan every year, requiring projects to adopt advanced technology products. It is reported that the "Lead Runner" program has higher requirements for advanced technology products, such as the photoelectric conversion efficiency of polycrystalline silicon cell modules and monocrystalline silicon cell modules reaching 16.5% and 17% respectively.

"Similar to the current promotion of the construction of distributed photovoltaic power generation application demonstration zones in my country, the implementation of the'leader' plan and higher requirements for its technical products are to a certain extent in order to establish the latest photovoltaic product technology and commercial application models. Refer to benchmarks to speed up the exit of backward production capacity and the entry of advanced technology products into the market, and promote the rapid upgrading of the overall technology of the photovoltaic industry." Meng Xiangan said.

It is worth noting that while the "Opinions" put forward the market access standards for photovoltaic products, it also attached a sentence: The above indicators will be adjusted in time according to the development of the industry.

"The gradual establishment of a cyclical progressive mechanism for market access standards for photovoltaic products will definitely accelerate the progress of photovoltaic power generation technology and industrial upgrading." Meng Xiangan pointed out that according to photovoltaic technologies and products at different development stages, differentiated market access standards will be adopted. It will help support the expansion of the market for advanced technology products, accelerate the elimination of technologically backward products, and standardize photovoltaic power generation technology and quality supervision and management. According to his analysis, the market access standards for photoelectric conversion efficiency of polycrystalline silicon cell modules and monocrystalline silicon cell modules will increase by 0.3% to 0.5% every year.

Speed ​​up the process of improving photovoltaic grid-connected standard system

Just as the photovoltaic upstream manufacturing industry lacks core competitiveness in the international market due to the slow technological upgrade of photovoltaic products, the lack of grid-connected standards for the domestic photovoltaic application market has also become a major obstacle to its further development.

Grid-connected technical standards are the basis to ensure reliable grid-connected photovoltaics, safe and stable operation and efficient consumption. The author learned that on June 3, the "Research on Key Technical Standards for Grid-connected Photovoltaic Power Generation" project passed acceptance. This means that my country will establish a complete grid-connected photovoltaic power generation standard system to provide comprehensive guidance for the construction, acceptance, operation and maintenance of grid-connected photovoltaic power plants in my country.

He Guoqing, deputy director of the New Energy Research Institute of China Electric Power Research Institute, who participated in and undertook the research work of the project, said in an interview with the author that the “research on key technical standards for photovoltaic power generation grid-connected” was led by the China Electricity Council. The framework of my country's photovoltaic power generation grid-connected standard system includes more than 80 standards in four categories: basic general, survey and design, construction acceptance and quality assessment, operation and maintenance, and grid-connected testing. The project has also formulated 13 national grid-connected photovoltaic power generation standards and 11 industry standards in line with my country's national conditions, all of which have been issued or submitted for approval.

He Guoqing told the author that for large-scale ground-based photovoltaic power plants, their grid-connected characteristics have many points in common with wind farms. Therefore, the grid-connected standards for photovoltaic power stations have fully borrowed the experience and lessons of wind power standards when setting up the grid connection standard for photovoltaic power stations. The Technical Regulations are similar and different in terms of active power changes, low voltage ride-through, and grid adaptability, highlighting the characteristics of faster photovoltaic short-term power changes and better inverter control performance.

"Different from the centralized development of wind power, there are a large number of distributed development methods in the photovoltaic power generation market. Due to the wide range of distributed development sites, small single capacity, low investment, and excessive grid-connection standards, it will greatly increase grid-connection costs. "Technical Regulations for Connecting Photovoltaic Power Generation Systems to Distribution Networks" has adopted simplified grid connection measures such as no mandatory requirement for optical fiber communication, no requirement for low voltage ride through, and no requirement for grid connection detection for distributed photovoltaics to ensure the smooth grid connection of distributed photovoltaics. "He Guoqing introduced. Regarding information monitoring, since private network communication methods such as optical fiber on distributed photovoltaics are not required, the development of distributed photovoltaics has brought great difficulties to the monitoring of the grid. At present, most distributed photovoltaics are in an unpredictable, unmonitored, and uncontrollable state. When the distributed photovoltaic capacity reaches a certain proportion in a certain area, it will bring greater risks to the operation of the grid.

“For this reason, we have carried out research on distributed photovoltaic grid power prediction and operation control technology, and used the method of dividing regions and drawing grids to predict and monitor distributed photovoltaic, which can realize the collection and storage of operation information once every 15 minutes. , Which greatly improves the visibility and controllability of distributed photovoltaics.” He Guoqing revealed that the technology has been demonstrated and applied in Jiangsu and Beijing. It can be promoted and applied across the country when it becomes more mature. It will not only improve the stability of the grid, but also It can be used for technical evaluation and quality supervision of photovoltaic power generation.

Elimination may have just begun. If the crazy expansion in 2010 and the subsequent industrial reshuffle have established the technical route and industrial structure of the photovoltaic upstream manufacturing industry in a certain historical period, the new round of reshuffle will likely be through the downstream power station system. The quality of the product and the performance of the product opened the distance between competitors.

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