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How to test inverter MPPT maximum power point tracking function
- May 02, 2018 -

How to test inverter MPPT maximum power point tracking function

-- Idex Releases High-Speed High-Performance Photovoltaic/Solar Simulation Power Supply


ITECH recently launched high-speed high-performance photovoltaic/solar simulation power supply, and is another key product in the field of new energy testing. It can complete high-performance solar panel output simulations for solar inverters, photovoltaic controllers and micro-grid equipment. Provide testing.


Whether or not oil resources are depleted is a false proposition, the development of renewable energy and clean energy are global consensus. China's PV industry suffered heavy losses due to EU anti-dumping, but with the rapid increase in domestic installed PV capacity, the boom has returned. By the end of 2016, the cumulative installed capacity of photovoltaics in the world reached 305 GW, and China's accumulated photovoltaic grid-connected capacity reached 77 GW. China's new and cumulative installed capacity of photovoltaic power generation is the largest in the world, and China’s domestic market has become the largest market for photovoltaic industry. Chinese companies such as Jingke and Huawei also ranked first in the world in shipments of key equipment such as photovoltaic modules and inverters.


According to China's commitment at the Paris Climate Summit, by 2030 the unit's GDP of the country’s carbon dioxide emissions will fall by 60% to 65% from 2005, and non-fossil energy will account for about 20% of primary energy consumption. Photovoltaics is an important non-fossil energy source. There are several key words on the path to achieve this overall goal: distribution, front runners, and subsidies.


Distributed: China's solar energy-rich areas are mainly distributed in the north and high altitude areas, but the power load demand is more concentrated in the eastern coastal areas. Large-scale solar power stations are often built in resource-rich areas, and the problem of power consumption is serious. "Can't send" can cause huge waste. The construction of distributed photovoltaics for self-use and surplus electricity access around the load becomes a powerful method to solve the consumption problem. First find a load that can reliably absorb photovoltaic power generation and build a photovoltaic power plant. As a key means of precision poverty alleviation, photovoltaic poverty alleviation projects often use distributed systems. The scale of photovoltaic systems depends on the load requirements and the available floor space. Domestic systems are in the range of several kilowatts, and commercial and industrial load systems often range from tens of kilowatts to several megawatts. At the same time, distributed systems are often built on rooftops, and the orientation and shielding of PV modules are complex. Therefore, string inverters are often used to maximize power generation efficiency.


Leaders: In order to guide the technological upgrading of the photovoltaic industry and enhance product competitiveness, a large part of China's annual PV construction scale index is allocated to the “photovoltaic leader program”, and only the photovoltaic components that meet the energy efficiency requirements of the leader plan and PV inverters can compete for this plan construction indicator. "China efficiency" has become the top priority for component and inverter manufacturers to make technological breakthroughs. The maximum power point tracking (PVP) algorithm and strategy for photovoltaic inverters are the core technologies.


To subsidize: The cost of photovoltaic power generation is higher than that of traditional energy sources. Photovoltaic subsidy policies have significantly stimulated the development of the industry, but the large amount of subsidies is also a problem that cannot be ignored. In recent years, with the improvement of the efficiency of photovoltaic modules and inverters and the reduction of costs, the profitability of photovoltaic systems has been continuously improved, and the photovoltaic generation price has been put on the Internet, which further impedes the technological upgrading of photovoltaic systems. When the photovoltaic power generation system realizes its own profitability, and it changes from the pursuit of scale expansion to the pursuit of quality and efficiency, it can truly gain market recognition and usher in the second spring of the photovoltaic industry.


In the “post-subsidy era”, enterprises must rely on technological progress to reduce costs and increase efficiency, and expand the application of photovoltaic power generation. ITECH's latest high-speed high-performance photovoltaic/solar simulation power supply adopts the IT6500C high-speed high-performance high-power DC power supply equipped with SAS1000 solar cell matrix simulation software, which can accurately simulate the IV curve of the solar cell matrix with a voltage up to 1000V. The power range can be expanded from 1.8kW up to 100kW, which is especially suitable for the detection requirements of string inverters and microgrid systems.


How to test inverter MPPT maximum power point tracking function

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SAS1000 software can simulate the IV output of the solar panel under the change of temperature and illumination within a day, and the output of the PV array under shade, which can be used to test the maximum power point tracking efficiency of the PV inverter under real environment, and can also be used to Photovoltaic inverters form a photovoltaic power generation system and provide support for the development and testing of smart meters, photovoltaic controllers, microgrid control centers and other equipment. They are key test equipment for new energy generation systems.


How to test inverter MPPT maximum power point tracking function

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In the test of maximum power point tracking, solar panel parameters such as panel material, open circuit voltage, short-circuit current, and maximum power point can be easily set. Various mainstream solar panel manufacturers' product data are built in, which simulates the characteristics of solar panels. Provides convenience. Users can also directly import up to 4096 points of I-V characteristics, perform other complex tests, and expand system functionality.


The system has built-in SAS model of EN50530/Sandia/NB/T32004/CGC/GF004/CGC/GF035. Users can simulate the output of IV curve to test static and dynamic maximum power point tracking performance of PV inverter and generate compliance with regulations. The report provides data for various tests such as European efficiency, California efficiency, and Chinese efficiency. Inverter manufacturers can use this feature to easily perform standardized tests.


How to test inverter MPPT maximum power point tracking function

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IT6500C has a wide range of voltage and current use, supports independent setting of edge time in various modes, with the CC/CV priority selection mode can achieve fast and no overshoot curve changes, support OVP, OCP, OPP, reverse connection protection And other protection features. In addition to solar panel simulation and maximum power tracking, it is also possible to test the inverter MPP voltage range, start voltage, maximum input voltage, maximum input current, and DC overvoltage protection. With the IT9100 Power Analyzer, the total efficiency and conversion efficiency of the inverter can be achieved.


ITECH high-speed high-performance photovoltaic/solar simulation power supply adopts professional solar cell matrix simulation software with high-speed and high-performance DC power supply to help maximize the efficiency tracking of photovoltaic power generation system. It can be widely applied to solar cell matrix simulation, photovoltaic inverter, and micro Inverters, solar controllers, microgrid systems and other test areas.