On November 15, 2020, the "2020 Fifth China Photovoltaic Industry Forum and 2020 China Good Photovoltaic Brand Ceremony" was grandly held at the DoubleTree by Hilton Hotel in Beijing. Ji Zhenshuang, deputy director of Beijing Jianheng Certification Center, made predictions and analyses on the future construction of photovoltaic intelligence. He pointed out that "intelligence is the only choice for photovoltaics, and there is a long way to go."

Ji Zhenshuang, Deputy Director of Beijing Jianheng Certification Center

The development of photovoltaic industry technology is improving

       In recent years, with the strong support of national policies, my country’s photovoltaic power generation industry has developed rapidly. At present, a diversified photovoltaic power generation market has been established such as large-scale photovoltaic power stations, distributed photovoltaic power generation, and off-grid photovoltaic systems. At the same time, my country is installing capacity Good results have also been achieved in terms of volume and silicon wafer production.

       The International Energy Network reporter learned that in 2017, my country's newly installed photovoltaic power generation capacity was 53.06GW, a record high. Since 2018, my country's photovoltaic industry has begun to transform from rapid development to high-quality development. In the first three quarters of 2020, 18.7GW of newly installed photovoltaic capacity nationwide. It is estimated that by the end of this year, photovoltaic annual power generation is expected to increase by 17.1%. Regarding whether the industry can reach the expected target, Ji Zhenshuang believes that my country's photovoltaic industry still needs to clarify the development direction of photovoltaics and solve the four constraints of consumption, land, efficiency, and cost.

       When talking about the future development direction of my country's photovoltaic industry technology, Ji Zhenshuang said that the future installed capacity and development speed of photovoltaics depend on the restrictive factors of industrial development, that is, how well the bottleneck problem is solved and how fast. Currently, digital technology has become a new engine of economic development, and photovoltaics are no exception. Adaptation, intensiveness, high efficiency, intelligence and green will become the main direction of photovoltaic industry technology development. And what we can do for the future photovoltaic industry technology is to establish binding technical indicators and refuse to squeeze the limited consumption and land resources of backward production capacity.

Intelligent photovoltaic construction is irreplaceable

       With the continuous breakthrough of photovoltaic industry technology, the intelligentization of photovoltaic industry has become a new goal of many manufacturing enterprises, including photovoltaic enterprises. Making full use of new-generation information technologies such as the Internet of Things, cloud computing, big data, and smart hardware to promote the upgrade of the photovoltaic industry from automation to intelligence can effectively increase photovoltaic power generation and reduce construction and operation and maintenance costs.

       It can be seen that photovoltaic intelligence is an inevitable trend in the development of the photovoltaic industry. Ji Zhenshuang said that in an era of such rapid technological change, technological progress will be the main driving force for the development of the photovoltaic industry, and intelligence will play an irreplaceable role. He predicted that photovoltaic intelligent technology will penetrate into all aspects of the industrial chain (including the service chain) in the future, such as the adaptation of virtual power plants, the combination with buildings, and the combination with agriculture and aquaculture.

       Considering the focus and direction of photovoltaic intelligent construction from the perspective of the long-term development of the industry, Ji Zhenshuang said that photovoltaic intelligentization should not be a gimmick, but should become a new era of high-tech technology to solve the pain points of industrial development.

       "We in the photovoltaic industry should follow the principle of problem orientation, take'self-perception, self-diagnosis, self-adaptation, self-regulation, and self-maintenance' as the overall goal of industrial development, and systematically plan the intelligent construction of photovoltaic power generation, including the allocation of functional baselines at all levels. , Technology development and standard formulation, etc." Ji Zhenshuang emphasized that in the short to medium term, the photovoltaic industry should give priority to the development and application of underlying supporting technologies, so that it is more convenient for the universal realization of photovoltaic intelligent technology.

Consolidate the underlying support technology of smart photovoltaics

       In contrast to the photovoltaic power generation construction process, system composition and functional requirements, Ji Zhen dually uses three examples to analyze the importance of the underlying support technology for photovoltaic intelligent construction. He believes that the development of the underlying technology focuses on three major points: self-diagnosis of system and equipment performance, optimization and control technology development, system and equipment intelligent safety control technology development, and grid adaptive intelligent control technology development.

       According to Ji Zhenshuang, photovoltaic power generation occupies a large area and has a wide range of fault sources. Every component, every line, and every connection may fail. Manual and traditional detection methods cannot achieve full coverage and low efficiency. However, performance diagnosis and optimization and control technology based on string IV perception can effectively perform fault diagnosis, which is a good underlying support technology. He said that with the development of the photovoltaic industry up to now, the level of technology research and development on the application side is lagging behind that on the manufacturing side. Only by constantly adding underlying technologies on the application side, such as IV perception testing, can we get rid of the shackles of technology.

       At present, in the industry, DC arcing and grounding can be regarded as the two major "killers" of photovoltaic electrical safety. Safety is of the essence. How to effectively ensure the safety of power on the DC side is an important issue facing the photovoltaic industry. The latest development of the underlying support technology-DC electrical safety control technology, which focuses on DC arc detection and fast shutdown, insulation and residual current detection and control, can effectively solve this problem.

       In general, Ji Zhenshuang believes that the key to in-depth advancement of the intelligent development of photovoltaics lies in returning to the photovoltaic enterprise itself, deeply grasping the core idea of “controlling the middle and liberalizing the two ends”, and truly achieving full deregulation of the two ends of photovoltaic supervision. Intermediate supervision is effective, decentralized without chaos and orderly.