Performance improvement of a photo voltaic array using MPPT (P&O) technique

2010 INTERNATIONAL CONFERENCE ON COMMUNICATION CONTROL AND COMPUTING TECHNOLOGIES Pub Date : 2010-12-17 DOI:10.1109/ICCCCT.2010.5670550

R. Sridhar, N. Thamizh Selvan, S. Jeevananthan, PV Sujith Chowdary

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引用次数: 28

Abstract

This paper proposes modeling and simulation of photovoltaic model. Taking in to account the temperature and sun's irradiance, the PV array is modeled and its voltage current characteristics and the power and voltage characteristics are simulated. This enables the dynamics of PV system to be easily simulated and optimized. It is noticed that the output characteristics of a PV array are influenced by the environmental factors and the conversion efficiency is low. Therefore a maximum power tracking (MPPT) technique is needed to track the peak power to maximize the produced energy. The maximum power point in the power -voltage graph is identified by an algorithm called perturbation & observation (P&O) method or Hill climbing. This algorithm will identify the suitable duty ratio in which the DC/DC converter should be operated to maximize the power output. The results confirm that the photo voltaic array with proposed MPPT controller can operate in the maximum power point for the whole range of assumed solar data (irradiance and temperature).

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利用MPPT (P&O)技术改进光伏阵列的性能

本文提出了光伏模型的建模与仿真。在考虑温度和太阳辐照度的情况下，对光伏阵列进行建模，并对其电压电流特性和功率电压特性进行仿真。这使得光伏系统的动力学可以很容易地模拟和优化。光伏阵列的输出特性受环境因素的影响，且转换效率较低。因此，需要一种最大功率跟踪(MPPT)技术来跟踪峰值功率以使产生的能量最大化。功率-电压图中的最大功率点由一种称为摄动观察法(P&O)或爬坡法的算法确定。该算法将确定合适的占空比，其中DC/DC转换器应该运行以最大限度地提高功率输出。结果证实，采用MPPT控制器的光伏阵列可以在整个假定的太阳数据(辐照度和温度)范围内工作在最大功率点。

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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2010 INTERNATIONAL CONFERENCE ON COMMUNICATION CONTROL AND COMPUTING TECHNOLOGIES

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