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The Design of Stand-Alone Photovoltaic Generation System Based on TMS320F2812 DSP

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Tutor: ChenGuoDing
School: Zhejiang University of Technology
Course: Control Theory and Control Engineering
Keywords: photovoltaic cell,MPPT,DC-DC,lead-acid batteries,DSP
CLC: TM615
Type: Master's thesis
Year:  2011
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Abstract:
With the increasing troubles of limited-energy exhaustion and enviromental pollution, solar energy with its uncomparable advantages in all kinds of renewable and environment-friendly energies get more and more concern all over the world, at the same time the development and application of photovoltaic technology has become a new field almost in all countries and it develops very quickly, especially the stand-alone photovoltaic system which has become the national emphasis of investment in most countries develops extremely well.This paper discribes the output characteristics of PV cell and MPPT algorithms in detail. The problems of we concern about such as DC/DC convertor and characteristics of lead-acid batteriesa are alayzed. Fused aforementioned technology, a stand-alone PV system which based on TMS320F2812 is designed. The main work and achievements are as follows:(1)This paper analyze and contrast a lot of MPPT algorithms which have some trait, meanwhile it depicts the principle and methods of how to charge and discharge in the lead-acid batteriesa, finally a method which combines the iterative comparative method and three-stage charging method in the lead-acid batteriesa is put forward in this project.(2) In this paper, a stand-alone PV generation system which based on TMS320F2812 DSP is designed. Including the control circuit for the main unit, the main circuit parameters, the driver circuit, detection circuit ,communication circuit,human interface circuit and so on.(3) SPWM inverter often connects the DC power supply unit and AC load in the stand-alone photovoltaic generation system. A SPWM inverter is designed in this paper.(4)This project is implemented by language C in the development environment of CCS3.3.Finally the experimental data is alayzed.
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