Fangpusun - Solar Power Inverter Manufacturer and Solar Charge Controller Supplier   

The working principle of grid inverter

by:Fangpusun     2020-11-09
Grid inverter is generally divided into grid-connected photovoltaic grid-connected inverter, wind grid-connected inverter, power equipment, inverter and other inverter grid-connected power generation equipment. Grid inverter with large photovoltaic power station is commonly used in system, many parallel photovoltaic group of string is connected to a single 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. Biggest characteristic is the system of high power, low cost. Working principle and characteristics of the grid inverter working principle: the core of the inverter device, is the inverter switch circuit, inverter circuit for short. The circuit through the power electronic switch conduction and shut off, to complete the function of the inverter. Characteristics: 1) Requirements with high efficiency. Due to the price of solar cells on the high side, in order to maximize use of solar cells, and improve the efficiency of the system, must try to improve the efficiency of the inverter. ( 2) With high reliability. The photovoltaic power station system is mainly used in remote areas, many power plants unattended and maintenance, which requires the inverter has the reasonable structure of circuit, strict screening of electronic components, instruments and demanded that the inverter for various protective functions, such as: input dc polarity reverse protection, ac output short circuit protection, overheating protection, overload protection, etc. ( 3) The input voltage has wide adaptation scope. Due to the voltage of the solar cell changes over load and sunshine intensity. Especially when the voltage of battery aging change range is very large, such as the 12 v battery, its voltage may change between 10 v ~ 16 v, this requires a dc input voltage inverter in the larger range to ensure the normal work.
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