grid-connected PV system

　　The photovoltaic grid connected system consists of photovoltaic modules, photovoltaic grid connected inverters, photovoltaic meters, loads, bidirectional meters, grid connected cabinets, and the power grid. The photovoltaic modules generate direct current from sunlight, which is converted into alternating current by the inverter to supply the load and send it to the power grid. There are two main modes of grid connected photovoltaic systems, one is "self use and surplus electricity grid connection", and the other is "full grid connection".

　　The general distributed photovoltaic power generation system mainly adopts the "spontaneous self use, surplus power grid" mode. The electricity generated by solar cells is given priority to the load. When the load is not used up, the excess electricity is sent to the grid. When the supply of load electricity is insufficient, the grid and photovoltaic system can simultaneously supply power to the load.

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