| As the global ecological environment worsening,photovoltaic power generation with its advantages such as no pollution,no noise become an important form of new energy power generation,and become the only way for energy construction,implement the strategy of sustainable development.Among them,the capacity components and the selection of the large photovoltaic system high power battery and the inverter is the basis and key of photovoltaic power station,this research has important theoretical significance and practical value.This paper expounds the principle,application of photovoltaic cells,analysis the photovoltaic array characteristics,the photovoltaic power station components selection provide certain guiding significance.Determine suitable for large photovoltaic grid power system topology structure,a mathematic model of the photovoltaic grid power generation systems.Grid voltage oriented vector control strategy was adopted to realize grid inverter with power grid of active power and reactive power decoupling control,and detailed analysis of the inverter Photovoltaic components analysis influence the output power and the inverter input power factor,put forward the photovoltaic cell components and photovoltaic grid inverter power capacity according to 1.1:1 ratio,while lowering the cost of photovoltaic power station construction KWH,improve the capacity and the overall benefit of photovoltaic power station.The results of the study are applied in a 200 shaanxi MWp ecological photovoltaic power generation project,the actual effect is good. |
