Analysis And Simulation Research On PV Grid-connected System

The issue focuses the analysis and simulation on a complete PV power system of the following aspects in detail .Firstly,this paper analyzed the U-I characteristics of the photovoltaic cell,established PV Simulink simulation model ,determined the correct and reasonable parameters.Secondly, the issue analyzed and compared several commonly used algorithms of photovoltaic arrays maximum power output, such as constant voltage method, the incremental conductance method, disturbance observer method, on this basis, proposed optimization algorithm for variable step size.Again, This paper analyzed several PV Grid-connected System topology and configuration, Proposed multi-grid inverter slip design scheme,built Simulink simulation model of the involved Boost circuit and bridge inverter circuit. Determined the correct and reasonable parameters. It has some reference value to the specific design of the circuit.Finally, This paper analyzed the causes of island effect and the current several commonly used detection method of island effect .