Photovoltaic system MPPTracker investigation and implementation using DSP engine and buck - boost DC-DC converter

2008 13th International Power Electronics and Motion Control Conference Pub Date : 2008-09-30 DOI:10.1109/EPEPEMC.2008.4635533

D. Peftitsis, G. Adamidis, P. Bakas, A. Balouktsis

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引用次数: 25

Abstract

In this paper, solar radiation simulation using clearness index kt, hour of day omegas and day of year n is studied. Daily distributions of solar radiation are presented for various clearness indexes kt. Additionally, taking into account the studies about solar radiation, a photovoltaic array system and a DC/DC buck - boost converter are studied. Simulation of the whole system is presented focusing on DC/DC converterpsilas control strategy so that the system operates in maximum power point (MPP) and converterpsilas output voltage remains constant. Incremental conductance algorithm is used for maximum power point tracker (MPPT) implementation. A simplest method for controlling duty cycle D and photovoltaic arraypsilas voltage by using a new variable (d = D/1-D) is proposed. Simulation results are shown and analyzed. For the implementation of this system, the dsPIC30F2010 Microchippsilas microcontroller was programmed to provide pulses to the semiconductor element of the DC-DC converter in order to track the Maximum Power Point (MPP) of the photovoltaic array.

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基于DSP引擎和降压型DC-DC变换器的光伏系统MPPTracker的研究与实现

本文研究了利用清晰度指数kt、日时omegas和年日n进行太阳辐射模拟。给出了不同清晰度指数kt下太阳辐射的日分布。此外，考虑到太阳辐射的影响，对光伏阵列系统和DC/DC降压-升压变换器进行了研究。对整个系统进行了仿真，重点研究了DC/DC变换器控制策略，使系统工作在最大功率点，变换器输出电压保持恒定。采用增量电导算法实现最大功率点跟踪器(MPPT)。提出了一种利用新变量D = D/1-D来控制占空比D和光伏阵列电压的最简单方法。给出了仿真结果并进行了分析。为了实现该系统，设计了dsPIC30F2010 microchipsilas微控制器，为DC-DC变换器的半导体元件提供脉冲，以跟踪光伏阵列的最大功率点(MPP)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2008 13th International Power Electronics and Motion Control Conference

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