Grid-connected PV System Simulation And Implementation

Solar energy is an important part of the new and reproductive energy resources, thus each country has invested tremendous sums of funds in competition for explor-ing the relevant technology and positively promoting the industrial progress, includ-ing largely broadening the application market. So, the grid-connected photovoltaic system is a focus in exploring the clear power without being neglected.In order to set the proper parameters in photovoltaic battery simulations, we generally try to match Voc and the Isc. But this method makes it difficult to reflect the battery's factualâ… -â…¤characteristic. We can minimize errors between the simulation result and objective one, making it more reflecting.To begin with, based on the MATLAB photovoltaic battery Solar Cell module, it brings forward a means of correcting the simulation module by the factual statistics and car-ries on simulation on the characteristics of Solar Cell.In addition to that, the thesis introduces three-phase four-wire system and re-solves the fourth bridge-arm's restriction problem, by establishing 3-Dimensional Vector Transformation. Meanwhile, the thesis utilizes the prevalent SVPWM modula-tion and PID control, and testi-fies the feasibility of the strategy by simulation.Besides, the thesis illustrates the relative principles of photovoltaic MPPT and discusses the DC-DC topology applied to photovoltaic MPPT and makes a decision from selective MPPT algorithms through comparison.To end up, the thesis discusses about the key hardware design in details and fin-ishes the simulation on hardware, with the certification of the reasonability of the hardware principle and the smooth way for the future research.