DC bus voltage adjusting and MPPT unified control system and method of photovoltaic microgrid

The invention discloses a DC bus voltage adjusting and MPPT unified control system and method of a photovoltaic microgrid, for the purposes of realizing unified control of MPPT control and DC bus voltage adjustment of a photovoltaic grid-connected inverter, improving the photovoltaic grid-connected efficiency and decreasing the operation cost of a photovoltaic microgrid system. According to the invention, unified control of the DC bus voltage adjustment and MPPT of the photovoltaic grid-connected inverter free from a DC/DC link and an energy storage apparatus comprising a DC/DC link under the condition of a common DC bus can be realized, the grid-connected efficiency of the photovoltaic inverter is improved, and the system and method provided by the invention is applied to the field of the photovoltaic microgrid.