Research On Intelligent Microgrid Based On Distributed Photovoltaic Power Generation

Distributed photovoltaic(Dis-PV)power generation is an important form of PV power generation.It is widely used in various buildings,infrastructure,industrial plants and other places,which has important positive significance in promoting the development and utilization of solar energy,energy conservation,emission reduction,and alleviating environmental pressure.Due to the large number and wide distribution of the Dis-PV,the form of access to the power grid of the should directly affect the security and stability of the power grid.The microgrid can effectively manage the Dis-PV systems scattered in various buildings and different distribution networks.In order to adapt to the future intelligent city energy development trend,the proportion of Dis-PV in the power systems will increase,microgrid will be a very important way of energy utilization and Dis-PV in-depth integration.Firstly,In this thesis,we introduces the components of PV microgrid with energy storage.Two Dis-PV systems on the roof of a university campus building,were well design and build,which provides condition to study the performance of Dis-PV power generation.Based on the actual operation of the Dis-PV systems,the PV power generation of different weather types,locations of direct solar points,each month of the year and four different seasons were investigated.Secondly,the operation characteristics of the Dis-PV system in the microgrid were studied.The energy flow in the microgrid was analyzed by comparing the operation in sunny days and rainy days.Based on the annual PV power generation,load power consumption and PV absorption rate,the operation of microgrid in different time periods and months was analyzed.Finally,based on the 3S technology,the area of the building roof in the campus was measured and the PV power generation resources of the campus building was evaluated.According to the characteristics of Dis-PV power generation,the PV power resources,load capacity,as well as the overall distribution grid network structure of the campus,the PV microgrid with energy storage of the campus are planned and designed.