Luận Văn Design and realize a small wind and solar power system

HO CHI MINH UNIVERSITY OF TECHNOLOGY
DEPARTMENT OF ELECTRONIC AND ELECTRICAL ENGINEERING
Đề tài hoàn thành Năm 2012
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TABLE OF CONTENTS

ACKNOWLEDMENT i
ABSTRACT ii
TABLE OF CONTENTS. iii
LIST OF FIGURES. v
LIST OF TABLES. x
CHAPTER 1: BACKGROUND OF WIND ENERGY 1-12
1.1Power usage in Vietnam 1
1.2 History of wind energy 6
1.3 Notable upside and downside of wind energy 7
1.4 Potential of wind energy development 12
CHAPTER 2: POWER IN THE WIND AND WIND TURBINE’S COMPONENTS 14-30
2.1 Basic Concepts on Wind Turbine 14
2.2 Wind Electric Systems 20
2.3 Wind Turbine Configurations 23
2.4 Wind Turbine Components 27
2.5 Comparison 29
CHAPTER 3: MECHANICAL DESIGN FOR THE WIND TURBINE 31-59
3.1 Certain points that need to be taken into consideration 31
3.2 Efficiency 32
3.3 Mechanical parts 34
3.4 Wind Turbine generator 49
3.5 Construction 58
CHAPTER 4: ELECTRICAL DESIGN FOR THE WIND TURBINE 60-85
4.1 Design Objectives 60
4.2 Rechargeable Battery 60
4.3 Charge controller 68
4.4 Implementation of the charge controller 76
4.5 Power Inverter 79
CHAPTER 5: SOLAR & WIND HYBRID POWER SYSTEM 86-93
5.1 Photovoltaic cell, array and module 86
5.2 Current-Voltage Curves for load 89
5.3Solar and Wind Hybrid Home Power System 92
CHAPTER 6: GRID SYNCHRONIZATION FOR DISTRIBUTED POWER GENERATION SYSTEMS 94-106
6.1 DPGS Structure 94
6.2 Control Structures for Grid-Connected DGPS 95
6.3 Grid Synchronization Methods 103
CHAPTER 7: EXPERIMENT .107-109
7.1 The whole view of the mechanical parts .
7.2 Blade Rotation Observance .
7.3 Experiment with motorbike alternator
7.4 Experiment with DC motor
7.5 Summary
CHAPTER 8: CONCLUSIONAND FURTHER DEVELOPMENT .110-112
8.1 Conclusion .
8.2 Further development

ABSTRACT

Recently, human has switched their focus into renewable energy. It has been considered the safe and clean, environment-friendly energy source. Within the past 10 years, renewable energy such as wind and solar energy have become more and more widely used. Still, their low efficiency is the brake that keeps them from receiving the right investment. They are still seen as the future rather than the replacement for daily use energy source we use nowadays. It’s a good news to hear that governments throughout the world have plan for wind energy, which can only be invested at some specific location where experts indicate that wind can be extracted with high efficiency. As for household uses, wind and solar energy should be taken into consideration as energy sources which can be stored. This is the aim our thesis has locked on.
In the first part, we are going to briefly introduce the overall picture of Vietnamese energy source as well as the government’s plans for developing large size wind turbines along the coast. Prior to the end of chapter 2, we will introduce some basic concepts on the wind turbine.
The mechanical design part shall be found on chapter 3, where blade design and generators are the main point we want to emphasize. We will also show why gearbox is necessary instead of the direct-drive method.
Chapter 4 will mostly concentrate on the charge controller and battery storage. The last part of this chapter will be about inverter, which is the footstep leads to the field of grid-tied synchronization.
Chapter 5 will introduce photovoltaic cell, array and module before showing why and how the solar panel needs battery bank. Once that was done, we will proceed to the wind and solar hybrid home power system in which the charge controller is everything to talk about.
Chapter 6 is a little different from the rest of the thesis, since it only focuses on introducing Control and Grid Synchronization for Distributed Power Generation Systems. No deep knowledge would be found on this chapter, though.
Toward the end of the thesis, we will summarize what we have and have not done; which lead to further development suggestion.