Modeling of Photovoltaic Systems Using MATLAB

Simplified Green Codes

Tamer Khatib, Wilfried Elmenreich

• Publisher: Wiley
• Year: 2016
• Print ISBN: 9781119118107
• eBook ISBN: 9781119118121
• Edition: 1
• Topic: Physical Sciences
• Subtopic: Energy

Modeling of PHOTOVOLTAIC SYSTEMS Using MATLAB®

Provides simplified MATLAB® codes for analysis of photovoltaic systems, describes the model of the whole photovoltaic power system, and shows readers how to build these models line by line.

This book presents simplified coded models for photovoltaic (PV)-based systems using MATLAB® to help readers understand the dynamic behavior of these systems. Through the use of MATLAB®, the reader has the ability to modify system configuration, parameters, and optimization criteria. Topics covered include energy sources, storage, and power electronic devices. The book contains six chapters that cover systems' components from the solar source to the end user. Chapter 1 discusses modeling of the solar source, and Chapter 2 discusses modeling of the PV source. Chapter 3 focuses on modeling of PV systems' power electronic features and auxiliary power sources. Modeling of PV systems' energy flow is examined in Chapter 4, while Chapter 5 discusses PV systems in electrical power systems. Chapter 6 presents an application of PV system models in systems' size optimization. Common control methodologies applied to these systems are also modeled in this book.

• Covers the basic models of the whole PV power system, enabling the reader modify the models to provide different sizing and control methodologies
• Examines auxiliary components to PV systems, including wind turbines, diesel generators, and pumps
• Contains examples, drills, and codes

Modeling of Photovoltaic Systems Using MATLAB®: Simplified Green Codes is a reference for researchers, students, and engineers who work in the field of renewable energy, and specifically in PV systems.

1
MODELING OF THE SOLAR SOURCE

1.1 INTRODUCTION

Solar energy is the portion of the Sun’s radiant heat and light, which is available at the Earth’s surface for various applications of generating energy, that is, converting the energy form of the Sun into energy for useful applications. This is done, for example, by exciting electrons in a photovoltaic cell, supplying energy to natural processes like photosynthesis, or by heating objects. This energy is free, clean, and abundant in most places throughout the year and is important especially at the time of high fossil fuel costs and degradation of the atmosphere by the use of these fossil fuels. Solar energy is carried on the solar radiation, which consists of two parts: extraterrestrial solar radiation, which is above the atmosphere, and global solar radiation, which is at surface level below the atmosphere. The components of global solar radiation are usually measured by pyranometers, solarimeters, actinography, or pyrheliometers. These measuring devices are usually installed at selected sites in specific regions. Due to high cost of these devices, it is not feasible to install them at many sites. In addition, these measuring devices have notable tolerances and accuracy deficiencies, and consequently wrong/missing records may occur in a measured data set. Thus, there is a need for modeling of the solar source considering solar astronomy and geometry principles. Moreover, the measured solar radiation values can be used for developing solar radiation models that describe the mathematical relations between the solar radiation and the meteorological variables such as ambient temperature, humidity, and sunshine ratio. These models can be later be used to predict solar radiation at places where there is no solar energy measuring device installed.

1.2 MODELING OF THE SUN POSITION

As a fact, the Earth rotates around the Sun in an elliptical orbit. Figure 1.1 shows the Earth rotation orbit around the Sun. The length of each rotation the Earth makes around the Sun is about 8766 h, which approximately stands for 365.242 days.

FIGURE 1.1 Earth rotation orbit around the Sun.

From the figure, it can be seen that there are some unique points at this orbit. The winter solstice occurs on December 21, at which the Earth is about 147 million km away from the Sun. On the other hand, at the summer solstice, which occurs on June 21, the Earth is about 152 million km from the Sun. However, to provide more accurate points, the Earth is closest to the Sun (147 million km) on January 2, and this point...

Table of contents

• COVER
• TITLE PAGE
• TABLE OF CONTENTS
• ABOUT THE AUTHORS
• FOREWORD
• ACKNOWLEDGMENT
• 1 MODELING OF THE SOLAR SOURCE
• 2 MODELING OF PHOTOVOLTAIC SOURCE
• 3 MODELING OF PV SYSTEM POWER ELECTRONIC FEATURES AND AUXILIARY POWER SOURCES
• 4 MODELING OF PHOTOVOLTAIC SYSTEM ENERGY FLOW
• 5 PV SYSTEMS IN THE ELECTRICAL POWER SYSTEM
• 6 PV SYSTEM SIZE OPTIMIZATION
• INDEX
• END USER LICENSE AGREEMENT