A Research Of Efficient Solar Inverter Based On DSC

Because of the energy crisis situation in worldwide, utilization of solar energy has been gradually taken seriously. This article is to analysis based on the solar PV grid-connected generation system. In particular, focus on the grid grid-connected inverter which is the core device of equipment.Firstly, the types and structure of the PV system including the standard for the utility-connected is summarized in this thesis. The inverter has been classified with different forms. The equivalent model of the photovoltaic cells has been introduced, and analysis the output characteristics of photovoltaic cells when the sunshine and temperature change. Put forward the concept of the MPPT (maximum power point tracking), and discuss the common algorithm of MPPT control, analyzing their principle and algorithm. Meanwhile, analyze the DC/DC conversion circuits which are used for the MPPT control. Then, use the principle of (P&O) to simulate in the Matlab/Simulink platform. The results have a good efficient.Secondly, analyze the characteristics of the L, LC, and LCL. Choose the LCL filter as program of the design. The method of passive damping and active damping method have been analyzed. First, Put forward the mathematical model of various control objects, then use the root locus and Bode diagram to analyze and point out the differences of their properties. Finally choose dual-loop control strategy based on current to simulate in Matlab/Simulink platform for single-phase grid-connected inverter with LCL filter. Verify its reliability from the frequency and phase’s tracking, power factor and harmonic testing, having a good efficient.The DSC microcontroller TMS320F28027of TI has been used in this paper. A500W PV grid Equipment have been designed. Most of the function have been finished, and have a good waveform graph, but some functions also need to be further improved.