The photovoltaic inverter is the core equipment of the photovoltaic power generation system. Its main function is to convert the direct current generated by the photovoltaic power generation system into current, track the maximum output power of the photovoltaic module array, and use its energy for electrical equipment applications or feeding into the power grid with the minimum transformation loss and optimal power quality. Since photovoltaic became an important member of the new energy race, inverters have become one of the segmented tracks of market attention.
The photovoltaic inverter mainly consists of input filtering circuit, DC/DC MPPT circuit, DC/AC inverter circuit, output filtering circuit, and core control unit circuit. Photovoltaic inverters can be divided into single-phase inverters and three-phase inverters based on the number of phases of output AC voltage; According to whether it is applied in grid connected power generation systems or off grid power generation systems, it can be divided into grid connected inverters and off grid inverters; According to the type of photovoltaic power generation applied, it can be divided into centralized photovoltaic power generation inverters and distributed photovoltaic power generation inverters; According to whether energy is stored, it can be divided into grid connected inverters and energy storage inverters; According to different technical routes, it can be divided into centralized inverters, string inverters, distributed inverters, and micro inverters.