How much is the role of the micro inverter?-Iota

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Service > How much is the role of the micro inverter?

How much is the role of the micro inverter?

Inverter is the key equipment in the solar photovoltaic system. Solar photovoltaic cells convert light energy into direct current, and then through the inverter to turn into 50 Hz, 230/400, 230V, or single phase alternating current.
According to the application of inverter in photovoltaic power generation system can be divided into two types of independent power supply and grid connection. According to the waveform modulation mode, it can be divided into square wave inverter, step wave inverter, sine wave inverter and combined three-phase inverter. For the inverter used in grid connected system, according to the transformer and can be divided into transformer type inverter and inverter without transformer.
Currently on the market use photovoltaic systems in most centralized inverter, the so-called centralized inverter, is a solar photovoltaic cells in series to a high-voltage direct current (HVDC). In the inverter is converted to AC. But in photovoltaic power station, solar photovoltaic battery component, partial shadow, different tilt angles and oriented range, dirt, different aging degree, small cracks and different photovoltaic panels of different temperature easy to cause the system mismatch leads to a decrease in the output efficiency of the disadvantages of the end, leading to substantially reduce the overall power output. So it has become a centralized inverter is difficult to solve the problem.
In order to solve this problem, in recent years, the "micro inverter" and "micro converter" new framework. In each solar cell module is equipped with a miniature inverter power supply, through the optimization of the output power of each module, making the overall output power maximization. Even if part of the panels by the shadow, dust cover, inverter power optimizer can still track the best local MPP (maximum power point), can save more than 57% of the loss of electricity generation. At the same time, power optimizer will input voltage / current conversion for different output voltage / current, in order to maximize improve energy transmission system.
Micro inverter definition
Micro inverter technology proposed inverter directly with a single PV module integration, for each PV module with a single with AC / DC conversion function and the maximum power point tracking function of the inverter modules, electricity generated in the PV module can directly convert the AC power supply AC loads or transmitted to the grid.
When there is a piece of a piece of work that is not good, only this one is affected. Other photovoltaic panels will be in the best working state, making the overall system more efficient, more power generation. In practical application, if there is a failure, the failure of the series inverter can be caused by the failure of the battery plate, and the influence of the micro inverter is quite small.
Several major advantages of micro inverter
1, try to improve the generating capacity of each inverter module, maximum power point tracking (MPPT), due to the single block assembly of maximum power point tracking, can greatly improve the photovoltaic system of generating capacity can be increased by 25%.
2, by adjusting the voltage and current of each line of photoelectric board, until all the balance, so as to avoid the loss of the system.
3, in addition, each module has a monitoring function, reduce the maintenance costs of the system, the operation is more stable and reliable.
4, configuration flexibility, in the home market can be in accordance with the user's financial resources to install photovoltaic cell size
5, no high voltage power, more safe, simple installation, more fast, maintenance and installation of low cost, reduce the dependence on the installation service providers, so that the solar power system by the user DIY.
6, the cost and the cost of the centralized inverter is very low, even lower.
Development of micro inverter
The concept of micro inverter has a long history. 10 years ago aisima (SMA) company is considering the development of the product, but finally decided not to do it. Since then, other companies have improved hardware and software to make it more attractive to the micro inverter. Located in the United States of California, from 3 engineers founded by Enphase NASA company 08 years of commercial production, and in that year has sold tens of thousands of sets of products. Then enphase obtained several venture capital this year in exchange Meinasidake listed to become the world's first micro inverter manufacturers.
In inverter industry is also a most notable event is the inverter leading aisima September 2009 announced, to increase its technology in photovoltaic technology market advantage, has acquired the located in the Netherlands in micro inverter research and development of the oke company. OKE was founded in 1984, is an earlier development of micro inverter manufacturers, SMA will use OKE technology to develop their own product line. SMA plans to release its own component inverter series this year. The industry believes that the acquisition will change the pattern of the micro inverter market.
Traditional inverter supplier Power-One, SunPower and SMA, also said that this year launched a micro inverter, the other competitors also include Siemens and AdvancedEnergyIndustries.
The most famous micro inverter manufacturers
EnphaseEnergy was founded in 2006, is headquartered in California, engaged in the design, development and sales of solar photovoltaic micro inverter, the product is applied to residential and commercial solar systems. EnphaseEnergy is the world's most famous micro inverter manufacturers, is also the world's first micro inverter manufacturers, the company in the first quarter of 2012 in the NASDAQ listed, its are in possession of the United States market rate as high as 35%.

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