| Solar energy as a huge amount of renewable energy,is now a large number of application of one of the main alternative energy of fossil fuels,is one of the most direct clean energy of human use,therefore the development and utilization of solar energy is of great strategic significance.Was designed and developed in this paper,a kind of solar inverter,with the advantages of simple structure,high stability,high efficiency.The traditional household level inverter power supply is usually in the power frequency transformer is used to realize the booster and electrical isolation.Although this inverter technology reliable performance,but there are still many deficiencies: system volume weight,carry inconvenience,low power density,high cost.Level before using high frequency inverter technology,this paper adopts the BOOST circuit booster,after class link using a half bridge inverter circuit,so as to realize a dc input,the standard mains MPPT grid inverter output conductance increment method.The following is the main work done in this paper:1.Photovoltaic power at home and abroad are briefly introduced the present situation and development prospect,and the function,classification and characteristics of photovoltaic(pv)grid power system made a simple introduction.2.A detailed analysis of the inverter circuit topology structure and working principle,in the inverter main circuit are analyzed,the effect of all components and their specific choice method and its parameter estimation.3.Design a conductance increment method is developed MPPT grid inverter,debug waveform by experiment,and applied to other systems.4.Development of the grid inverter power rating to 5 kva,which allows the grid voltage range(single phase)for 180 v to 260 v,which allows the grid frequency range of 47 Hz ~ 51.5 Hz / 57 Hz ~ 61.5 Hz,have polarity reverse connect protection,short circuit protection,islanding protection,overheating protection,overload protection,earthing protection and other protection measures. |
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