Smart photovoltaic power station is a new type of power station based on photovoltaic power conversion and power transmission network, which is highly integrated with modern advanced digital information technology, communication technology, Internet technology, cloud computing technology, big data mining technology and photovoltaic technology. It aims to fully meet customers' needs for high power generation, low initial investment, low operation and maintenance costs, high reliability and safety of photovoltaic power plants, and achieve high profitability, operability, manageability and reliability within a 25-year life cycle. Evolution.

　　The salient features of smart photovoltaic power stations are intelligence, efficiency, safety and reliability. We will make a series of reports focusing on these points in the future. This article first provides a detailed explanation of intelligence.

　　How do we understand the concept of intelligence in smart photovoltaic power plants? In what specific aspects does it manifest itself? In short: it is the full digitalization of the power station. On the basis of digitalization, it realizes intelligent collection of component information, high-speed intelligent transmission of information and intelligent analysis of massive information, thereby truly realizing intelligent management, intelligent monitoring and intelligent operation and maintenance of photovoltaic power plants. .

　　one. Fully digital power station

　　Smart photovoltaic power stations are fully digital power stations that can be truly trusted, visible, manageable and controllable. Its key equipment, the smart inverter, can achieve high-precision collection of information such as current and voltage of each string (detection accuracy reaches more than 0.5%). These large amounts of accurate data are transmitted to the photovoltaic power station control center through high-speed Internet for further processing. processing to achieve trustworthiness and visibility; due to the increase in transmission bandwidth and reduction in transmission delay (up to ms level), the control speed of the power station is greatly improved and controllability is achieved; through a comprehensive power station management system and big data analysis engine, Realize the manageability of the power station. The digitization of photovoltaic power stations has laid the foundation for future business and business model innovation. For example, through the mobile Internet, users can subscribe to panels or strings at designated locations and obtain real-time revenue information through mobile apps.

　　Secondly, smart photovoltaic power stations use innovative networking solutions to break the constraints of existing designs and reorganize components, cables, inverters, booster transformers, monitoring and data from the perspectives of simplified construction, optimal system performance matching, and simplified maintenance. The collection unit and other system components are combined and optimized; the types of components are reduced, more standardized, and more conducive to automated production; through factory pre-assembly and connector installation, on-site construction costs are reduced and construction quality is improved. And create a photovoltaic power station that can be upgraded, expanded, and evolved. When component technology advances and the operating environment changes, the software of the smart inverter can be remotely upgraded online, with backward-compatible design and other features. There is no need to replace online operating equipment. Through algorithm upgrades, you can enjoy the latest technological achievements and maximize reuse. Existing equipment.

　　Thirdly, smart photovoltaic power stations have active grid adaptive technology, taking advantage of the high-speed processing capabilities, high sampling and control frequency, control algorithms and other advantages of smart inverters to actively adapt to changes in the grid to achieve better multi-machine parallel control and better The quality of grid-connected harmonics can better meet the grid access requirements and improve the adaptability in harsh grid environments.

　　two. Intelligent operation and maintenance management

　　Smart photovoltaic power stations can monitor, operate, manage, and alarm from multiple dimensions such as time, space, and equipment. They can analyze, judge, evaluate, and integrate power station operation problems to achieve fast and simple operation and maintenance, providing convenience to operators and maintenance personnel. , managers, etc. to provide comprehensive, convenient and differentiated data and services.

　　For example, the introduction of big data analysis engines and expert operation and maintenance systems, based on the collected massive information, customized reports, expert analysis systems, and slice analysis, tap the potential of the system, discover potential problems, and form empirical data. Discover potential defects in a timely manner and tap into room for revenue improvement. Through real-time data collection, cloud storage and online expert analysis system, combined with the geographical environment, climate characteristics and power station scale of the photovoltaic power station, the data information collected by the power station is used to predict power generation and other information. The power station can automatically perform health examinations and provide profit-maximizing advice. Maintenance suggestions, such as cleaning suggestions, parts replacement and maintenance suggestions, etc., to achieve preventive maintenance; accumulate long-term operation data, comprehensively analyze the natural environment, irradiation and other environmental factors, and make the power station more efficient through online adjustment of the intelligent control unit algorithm or software upgrade System components run in the best matching state under different environments to maximize benefits.

　　The application of drones is a feature of intelligent operation and maintenance. Drone intelligent inspection can support mobile inspection. On-site problems can be diagnosed and analyzed based on historical equipment data, and problems such as component hot spots, cracks, mismatches and other issues can be discovered in a timely manner. Video data can be transmitted back to the expert center in real time to achieve information sharing. , remote diagnosis, truly achieving early prevention, early detection, and early resolution to avoid power loss and malfunctions.

　　Mobile operation and maintenance with photovoltaic terminals as the core is also a highlight. This mobile operation and maintenance model can be seamlessly connected with the production management system, simplifying the large number of manual reports and manual processing links in the traditional operation and maintenance model; at the same time, front and rear collaboration, air and ground collaborative operation and maintenance, and rear experts can master the real-time remote diagnosis through video on-site conditions and guide front-line staff to deal with faults and problems.

　　At the same time, photovoltaic smart terminals are used to realize the convenient entry of power generation equipment assets, support asset query and analysis based on asset historical data; support equipment evaluation of different batches or different manufacturers based on the operation status and maintenance data of the assets; realize primary and secondary power stations The unified management of secondary equipment and other equipment is presented in visual ways such as topology diagrams and hierarchies; it supports the operation and maintenance mode of mobile terminals to view the operation status and important data of the power station; combined with the equipment data, operation data, operation and maintenance data of the power station, Historical data and power generation forecasts support financial assessment of power stations and provide reference for power station transactions.

　　The most critical thing about smart photovoltaic power stations is the introduction of digital information technology. Through the integration of big data mining and analysis, cloud computing, communication technology, etc. with photovoltaic technology, smart management, smart operation and maintenance, and smart monitoring are finally realized. Photovoltaic power stations are also truly Entering the era of intelligence! As Mr. Shi Dinghuan, Counselor of the State Council and Chairman of the China Renewable Energy Society, said, bringing digital information technology into the renewable energy industry will achieve the combination of the two industries in terms of specific products, which will greatly promote smart power stations, smart grids and even The rapid development of smart energy will make an important contribution to China's transformation from a major renewable energy country to a powerful renewable energy country.

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