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The classification of the grid inverter

by:Fangpusun     2020-11-10

1, according to the isolation method classification including including isolation and the isolation type two kinds, including isolation type grid inverter is divided into power frequency transformer isolation method and way of high-frequency transformer isolation, more than at the beginning of the development of photovoltaic (pv) grid inverter with the method of power frequency transformer isolation, but due to its obvious flaw size, weight, cost, high-frequency transformer isolation method in recent years the rapid development of the grid inverter, the isolation type grid inverter with its advantage of high efficiency, simple control also gradually recognition, has now started application in Europe, but need to solve key problems such as reliability, common-mode current. 

 2, according to the output phase for classification can be divided into two categories, single-phase and three-phase grid inverter, small and medium-sized power occasions the single-phase way more commonly, high-power three-phase grid inverter. Classified according to the level of power, can be divided into the power of less than 1 kva small power grid inverter, power level 1 kva ~ 50 kva middle power grid inverter and more than 50 kva power grid inverter. 

 3, according to the direction of power flow are classified into single grid inverter power flow and the two sides to the power grid inverter, unidirectional power flow only used for grid power grid inverter, bi-directional power flow grid inverter, besides can be used as a grid power can also be used as a rectifier, improves the quality of power grid voltage and load power factor, bidirectional power flow in recent years, grid inverter started to gain attention, is one of the development direction of the future. 

 4, according to the topological structure classification the topology of the currently used include: full bridge inverter topology, half bridge inverter topology, multilevel inverter topology, push-pull inverter topology, normal shock inverter topology, the flyback inverter topology, including high pressure high-power photovoltaic (pv) grid inverter adopts multilevel inverter topology, medium power photovoltaic (pv) grid inverter adopts full bridge, half bridge inverter topology, small power photovoltaic (pv) grid inverter adopts normal shock, the flyback inverter topology. Keywords: grid inverter more articles about inverter show: solar inverter and component ratio
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