| Due to the distribution characteristics of solar energy,distributed solar microgrid power generation is more suitable for electricity demand and future smart grid technology.In this paper,aiming at improving the efficiency of distributed solar microgrid power generation,the related technical principles and implementable solutions are discussed.(1)The overall structure of the 10 kV photovoltaic microgrid power generation system was designed.(2)In order to improve the utilization rate of solar energy,the photovoltaic day-tracking system and MPPT technology have been deeply researched and simulated in combination with the environmental conditions in the region.Compared with the traditional scheme,the response speed is improved,the energy loss is reduced,and the solar energy utilization rate is increased by 22%.(3)The DC/AC inverter circuit uses a two-level topology based on virtual flux linkage direct power control.The simulation research and comparative analysis of the control method show the advantages of virtual flux direct power control,which not only improves the stability of the grid connection,but also reduces the system cost.(4)Completed the modular hardware design of STM32 control. |
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