MPPT for PV using Coupled Inductor SEPIC converter for standalone power system

2016 International Conference on Energy Efficient Technologies for Sustainability (ICEETS) Pub Date : 2016-04-07 DOI:10.1109/ICEETS.2016.7583824

S. Venkatanarayanan, C. Sakthivinayagam

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引用次数: 7

Abstract

The characteristic of the photovoltaic system (PV) varies with time to time based on solar irradiation and whether condition. However, the Maximum Power can be extracted from the PV system with the help of Maximum Power Point Tracking (MPPT) techniques. In this paper, a Perturb and Observe (P & O) algorithm is used to obtain the maximum power by the procedure of perturbing and observation. To avoid the ripple content present in the solar cell array (SCA) current a Coupled Inductor SEPIC converter is proposed here based on governing circumstance of the ripple. Moreover, the efficiency of the converter is improved by using coupled inductor because it needs only lesser amount of magnetic core. So the P & O algorithm changes the duty cycle of the converter switch to cope with the load equivalent to the Maximum Power. It is achieved by MPPT algorithm, and it is determines the changes in converter duty cycle. In this invention, Mathematical models are defined and P & O algorithm is progressed. Then the PV system incorporated with MPPT controller modeling is invented in the SIMULINK.

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采用耦合电感SEPIC变换器的独立电力系统MPPT

光伏系统(PV)的特性随着时间的变化，取决于太阳辐照和是否条件。然而，借助最大功率点跟踪(MPPT)技术可以从光伏系统中提取最大功率。本文采用扰动与观测(P & O)算法，通过扰动与观测的过程获得最大功率。为了避免太阳能电池阵列电流中存在纹波，提出了一种基于纹波控制环境的耦合电感SEPIC变换器。此外，由于耦合电感的使用减少了磁芯的数量，提高了变换器的效率。因此P & O算法通过改变变换器开关的占空比来应对相当于最大功率的负载。它是通过MPPT算法实现的，它决定了变换器占空比的变化。在本发明中，定义了数学模型并提出了P & O算法。然后在SIMULINK中设计了结合MPPT控制器建模的光伏系统。

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2016 International Conference on Energy Efficient Technologies for Sustainability (ICEETS)

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