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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