DC bus distributed MPPT photovoltaic power generation system

The invention discloses a DC bus distributed MPPT photovoltaic power generation system. The system comprises a photovoltaic cell array, a DC conflux boosting unit, a grid-connected inverter unit and an AC boosting unit, wherein the photovoltaic cell array, the DC conflux boosting unit, the grid-connected inverter unit and the AC boosting unit are connected in sequence; the photovoltaic cell array is composed of one or more cell arrays; the DC conflux boosting unit is composed of one or more DC power sources, and the intelligent DC power sources are used for boosting variable photovoltaic cell voltages sent by the photovoltaic cell array into stable high voltages; the grid-connected inverter unit comprises an inverter and is used for stabilizing output voltages of the DC conflux boosting unit and being responsible for start and stop of the working logic of the whole system; the AC boosting unit comprises a transformer. The DC bus distributed MPPT photovoltaic power generation system has the advantages of being simple in structure, low in cost, capable of improving the overall efficiency and the like.