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The classification of the grid inverter and the way the grid inverter inverter

by:Fangpusun     2020-11-10
The classification of the grid inverter and the way the grid inverter inverter grid inverter is generally divided into grid-connected photovoltaic grid-connected inverter, wind grid-connected inverter, power equipment, inverter and other electrical equipment grid-connected inverter. The characteristics of the grid inverter, high power, low cost. Grid inverter inverter way is: the centralized inverter, group, series inverter, multiple sets of series inverter and component inverter centralized inverter: centralized inverter and is commonly used in large-scale photovoltaic power station ( > 10千瓦) Parallel photovoltaic systems, many even to the same group of string is centralized inverter dc input, the use of the general power three-phase IGBT power modules, the use of smaller power field effect transistor, at the same time using DSP conversion controller to improve the quality of the output power, making it very close to the sine wave current. Group series inverter: series inverter has become now the most popular in the international market of the inverter. Set series inverter is based on a modular concept, on the basis of each photovoltaic string ( 1 kw - 5千瓦) Through an inverter, the dc side peak with maximum power tracking, parallel interconnection on the ac side. Many large photovoltaic power plant using group series inverter. Multiple sets of series inverter: multiple sets of series inverter is take the advantages of centralized inverter and group series inverter, avoid its shortcomings, can be applied to a few kilowatts of photovoltaic power station. In multiple sets of series inverter, contains a different single peak power tracking and dc to dc converter, the dc by a common dc to ac inverters convert alternating current (ac), interconnection to the grid. Components inverter, inverter is to each of the pv modules connected to an inverter, at the same time, each component has a single peak maximum power tracking, such components and the inverter with the better. Is often used to 50 w to 400 w solar power station, the total efficiency is lower than the group series inverter. Keywords: inverter more articles about photovoltaic inverter show: accountability inverter power quality how should choose?
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