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Developing a photovoltaic MPPT system
Title
Developing a photovoltaic MPPT system.
Creator
Bennett, Thomas, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
Many issues related to the design and implementation of a maximum power point tracking (MPPT) converter as part of a photovoltaic (PV) system are addressed. To begin with, variations of the single diode model for a PV module are compared, to determine whether the simplest variation may be used for MPPT PV system modeling and analysis purposes. As part ot this determination, four different DC/DC converters are used in conjunction with these different PV models. This is to verify consistent...
Show moreMany issues related to the design and implementation of a maximum power point tracking (MPPT) converter as part of a photovoltaic (PV) system are addressed. To begin with, variations of the single diode model for a PV module are compared, to determine whether the simplest variation may be used for MPPT PV system modeling and analysis purposes. As part ot this determination, four different DC/DC converters are used in conjunction with these different PV models. This is to verify consistent behavior across the different PV models, as well as across the different converter topologies. Consistent results across the different PV models, will allow a simpler model to be used for simulation ana analysis. Consistent results with the different converters will verify that MPPT algorithms are converter independent. Next, MPPT algorithms are discussed. In particular,the differences between the perturb and observe, and the incremental conductance algorithms are explained and illustrated. A new MPPT algorithm is then proposed based on the deficiencies of the other algorithms. The proposed algorithm's parameters are optimized, and the results for different PV modules obtained. Realistic system losses are then considered, and their effect on the PV system is analyzed ; especially in regards to the MPPT algorithm. Finally, a PV system is implemented and the theoretical results, as well as the behavior of the newly proposed MPPT algorithm, are verified.
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Date Issued
2012
PURL
http://purl.flvc.org/FAU/3356887
Subject Headings
Photovoltaic power systems, Design, Electronic circuits, Electric current converters, Power (Mechanics), Renewable energy sources
Format
Document (PDF)
Predicting failure of remote battery backup systems
Title
Predicting failure of remote battery backup systems.
Creator
Aranguren, Pachano Liz Jeannette, Khoshgoftaar, Taghi M., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
Uninterruptable Power Supply (UPS) systems have become essential to modern industries that require continuous power supply to manage critical operations. Since a failure of a single battery will affect the entire backup system, UPS systems providers must replace any battery before it runs dead. In this regard, automated monitoring tools are required to determine when a battery needs replacement. Nowadays, a primitive method for monitoring the battery backup system is being used for this task....
Show moreUninterruptable Power Supply (UPS) systems have become essential to modern industries that require continuous power supply to manage critical operations. Since a failure of a single battery will affect the entire backup system, UPS systems providers must replace any battery before it runs dead. In this regard, automated monitoring tools are required to determine when a battery needs replacement. Nowadays, a primitive method for monitoring the battery backup system is being used for this task. This thesis presents a classification model that uses data mining cleansing and processing techniques to remove useless information from the data obtained from the sensors installed in the batteries in order to improve the quality of the data and determine at a given moment in time if a battery should be replaced or not. This prediction model will help UPS systems providers increase the efficiency of battery monitoring procedures.
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Date Issued
2013
PURL
http://purl.flvc.org/fau/fd/FA0004002
Subject Headings
Electric power systems -- Equipment and supplies, Energy storing -- Testing, Lead acid batteries, Power electronics, Protective relays
Format
Document (PDF)
Applications of pulse width modulation to LEDs, fuel cells and battery technology
Title
Applications of pulse width modulation to LEDs, fuel cells and battery technology.
Creator
Watt, Wayne W., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
It has become a case of great desire and, in some instances, a requirement to have systems in engineering be energy efficient, in addition to being effectively powerful. It is rare that there is a single technique that has the range to make this possible in a wide collection of areas in the field. The work done in this thesis exhibits how Pulse Width Modulation (PWM) bridges LEDs, plug in vehicles, fuel cells and batteries, all seemingly different sub categories of electrical engineering. It...
Show moreIt has become a case of great desire and, in some instances, a requirement to have systems in engineering be energy efficient, in addition to being effectively powerful. It is rare that there is a single technique that has the range to make this possible in a wide collection of areas in the field. The work done in this thesis exhibits how Pulse Width Modulation (PWM) bridges LEDs, plug in vehicles, fuel cells and batteries, all seemingly different sub categories of electrical engineering. It stems from an undergraduate directed independent study supervised by Dr. Zilouchian that encircled LEDs and electric vehicles and how they contribute to a smart electric grid. This thesis covers the design and development of a prototype board that test how PWM saves energy, prolongs lifespan and provides a host of customizable features in manufactured LED lights that are used in the marine industry. Additionally, the concept of charging batteries that provide power to electric vehicles was explored. It is stressed that consumers who are interested in electric vehicles are concerned about refueling and recharge times. It is natural that a competing product, such as the electric vehicle in a world dominated by internal combustion engines, will perform on par if not better than existing choices. Tests are conducted to investigate the methods of fast battery charging and the challenges this technique creates. Attention is also given to the development of a pulsed Proton Exchange Membrane (PEM) fuel cell, specifically to prove whether pulse modulation is more efficient in a hydrogen producing fuel cell as opposed to direct-driven voltage and current alternatives.
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Date Issued
2011
PURL
http://purl.flvc.org/FAU/3174313
Subject Headings
Power electronics, Digital control systems, Electric current converters, Fuel cells, Economic aspects
Format
Document (PDF)
A Power Quality Monitoring System for a 20 kW Ocean Turbine
Title
A Power Quality Monitoring System for a 20 kW Ocean Turbine.
Creator
Cook, Kevin, Xiros, Nikolaos I., Florida Atlantic University
Abstract/Description
This thesis explores an approach for the measurement of the quality of power generated by the Center of Ocean and Energy Technology's prototype ocean turbine. The work includes the development of a system that measures the current and voltage waveforms for all three phases of power created by the induction generator and quantifies power variations and events that occur within the system. These so called "power quality indices" are discussed in detail including the definition of each and how...
Show moreThis thesis explores an approach for the measurement of the quality of power generated by the Center of Ocean and Energy Technology's prototype ocean turbine. The work includes the development of a system that measures the current and voltage waveforms for all three phases of power created by the induction generator and quantifies power variations and events that occur within the system. These so called "power quality indices" are discussed in detail including the definition of each and how they are calculated using LabYiew. The results of various tests demonstrate that this system is accurate and may be implemented in the ocean turbine system to measure the quality of power produced by the turbine. The work then explores a dynamic model of the ocean turbine system that can be used to simulate the response of the turbine to varying conditions.
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Date Issued
2010
PURL
http://purl.flvc.org/fau/fd/FA00012514
Subject Headings
Marine turbines--Mathematical models, Fluid dynamics, Power electronics, Finite element method
Format
Document (PDF)
Energy-efficient routing in ad hoc wireless networks
Title
Energy-efficient routing in ad hoc wireless networks.
Creator
Dai, Qing., Florida Atlantic University, Wu, Jie
Abstract/Description
The ad hoc wireless network is an infrastructureless network, where mobile stations are typically powered by batteries. Energy conservation has therefore becomes a very important issue. In this thesis, we discuss our work on several problems in energy-efficient routing. Chapter 3 focuses on how to compute the minimum uniform broadcast transmission power in an ad hoc wireless network. Several algorithms are proposed and their running time compared through simulation. It is shown that Prim's...
Show moreThe ad hoc wireless network is an infrastructureless network, where mobile stations are typically powered by batteries. Energy conservation has therefore becomes a very important issue. In this thesis, we discuss our work on several problems in energy-efficient routing. Chapter 3 focuses on how to compute the minimum uniform broadcast transmission power in an ad hoc wireless network. Several algorithms are proposed and their running time compared through simulation. It is shown that Prim's Minimum Spanning Tree (MST) has better performance than Kruskal's MST and the two binary search algorithms. In the following two chapters, routing algorithms are studied for specific situations, when directional antenna is used (Chapter 4) or when partial signal could be collected, stored and integrated (Chapter 5). Different algorithms are discussed and their energy performance illustrated by simulation study. Their application and limitation are also discussed in the thesis.
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Date Issued
2003
PURL
http://purl.flvc.org/fcla/dt/13077
Subject Headings
Wireless communication systems, Routers (Computer networks), Electronic digital computers--Power supply, Mobile computing
Format
Document (PDF)
Power-aware broadcasting and activity scheduling in ad hoc wireless networks using connected dominating sets
Title
Power-aware broadcasting and activity scheduling in ad hoc wireless networks using connected dominating sets.
Creator
Wu, Bing., Florida Atlantic University, Wu, Jie, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
In mobile ad hoc wireless networks (MANET), due to host mobility, broadcasting is expected to be frequently used to find a route to a particular host, to page a host, and to alarm all hosts. A straightforward broadcasting by flooding is usually very costly and results in substantial redundancy and more energy consumption. Power consumption is an important issue since most mobile hosts operate on battery. Broadcasting based on a connected dominating set (CDS) is a promising approach, where...
Show moreIn mobile ad hoc wireless networks (MANET), due to host mobility, broadcasting is expected to be frequently used to find a route to a particular host, to page a host, and to alarm all hosts. A straightforward broadcasting by flooding is usually very costly and results in substantial redundancy and more energy consumption. Power consumption is an important issue since most mobile hosts operate on battery. Broadcasting based on a connected dominating set (CDS) is a promising approach, where only nodes inside CDS need to relay the broadcast packet. Wu and Li proposed a simple distributed algorithm for calculating CDS in MANET. In general, nodes inside CDS consume more energy to handle various bypass traffics than nodes outside the set. To prolong the life span of each node and, hence, the network by balancing the energy consumption in the system, nodes should be alternated in being chosen to form a CDS. Activity scheduling deals with the way to rotate the role of each node among a set of given operation modes. In thesis I propose to apply power-aware CDS notions to broadcasting and activity scheduling. I also introduce distance rule and extended rules to further reduce broadcasting energy consumption. The effectiveness of the proposed method are confirmed through my simulation experiment.
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Date Issued
2002
PURL
http://purl.flvc.org/fcla/dt/12958
Subject Headings
Mobile computing, Wireless communication systems, Electronic digital computers--Power supply
Format
Document (PDF)
Local construction of connected dominating sets in wireless ad hoc networks
Title
Local construction of connected dominating sets in wireless ad hoc networks.
Creator
Dai, Fei., Florida Atlantic University, Wu, Jie, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
Abstract/Description
Wireless ad hoc networks are infrastructure-less multi-hop networks consisting of mobile (such as in mobile ad hoc networks) or stationary (such as in wireless sensor networks) wireless devices. These networks involve several challenges, including limited bandwidth and energy resources, frequent topology changes, and a lack of central control. Local acting, self-organizing, and self-healing algorithms (also called localized algorithms) are essential to the design of wireless ad hoc networks....
Show moreWireless ad hoc networks are infrastructure-less multi-hop networks consisting of mobile (such as in mobile ad hoc networks) or stationary (such as in wireless sensor networks) wireless devices. These networks involve several challenges, including limited bandwidth and energy resources, frequent topology changes, and a lack of central control. Local acting, self-organizing, and self-healing algorithms (also called localized algorithms) are essential to the design of wireless ad hoc networks. A connected dominating set (CDS) is frequently used in wireless ad hoc networks as a virtual backbone to support efficient routing, service discovery, and area monitoring. In addition, efficient broadcasting (i.e., finding a small set of forward nodes to ensure full delivery) can be viewed as forming a CDS on-the-fly. The periodically maintained virtual backbone is called a static CDS, and the temporarily formed forward node set is called a dynamic CDS. For efficiency and robustness, the ideal CDS construction algorithm is lightweight, has fast convergence, and minimizes the CDS size. This dissertation focuses on providing a generic framework to unify localized CDS construction schemes, including both static and dynamic CDS constructions, for wireless ad hoc networks. The goal is to provide insights on how to form a small CDS (forward node set) in dynamic networks with affordable overhead and high robustness. A classification of CDS construction algorithms for wireless ad hoc networks has been provided at the beginning. An efficient scheme, called Rule K, has been proposed for static CDS construction. Rule K achieves a probabilistic constant upper bound on the expected CDS size, which is currently the best known performance guarantee for localized CDS algorithms. Rule K has been extended to a unified framework, called the coverage condition, which contains most existing localized virtual backbone construction and efficient broadcast algorithms as its special cases. The coverage condition has been further extended to construct a k-connected k-dominating set for higher robustness, and integrated in an iterative process that further reduces the CDS size while maintaining the same level of robustness.
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Date Issued
2005
PURL
http://purl.flvc.org/fcla/dt/12144
Subject Headings
Wireless communication systems, Electronic digital computers--Power supply, Mobile computing, Sensor networks
Format
Document (PDF)
Design ofMOSFET ultra-wideband low noise amplifiers
Title
Design ofMOSFET ultra-wideband low noise amplifiers.
Creator
Camacho, Esteban, Bagby, Jonathan S., Florida Atlantic University
Abstract/Description
Ultra-Wide band (UWB) systems are a new wireless technology capable of transmitting data over a wide spectrum of frequency bands with very low power and high data rates. This technology has the potential to replace almost every cable at home or in an office with a wireless connection. In a UWB receiver, a radio frequency (RF) low noise amplifier (LNA) is one of the most important components. This thesis discusses the entire process involving the design ofUWB low noise amplifiers including a...
Show moreUltra-Wide band (UWB) systems are a new wireless technology capable of transmitting data over a wide spectrum of frequency bands with very low power and high data rates. This technology has the potential to replace almost every cable at home or in an office with a wireless connection. In a UWB receiver, a radio frequency (RF) low noise amplifier (LNA) is one of the most important components. This thesis discusses the entire process involving the design ofUWB low noise amplifiers including a detailed stage by stage analysis of a computer aided design (CAD) of a MOSFET UWB LNA. Simulation tools and concepts from Level I equations are used in order to design a circuit with a realistic MOS model such as the BSIM3 used in this work. The LNA shows improved power consumption over the designs it is based on while still producing comparable results.
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Date Issued
2008
PURL
http://purl.flvc.org/fau/fd/FA00012510
Subject Headings
Electronic circuit design, Integrated circuits--Very large scale integration, Metal-oxide semiconductor field-effect transistors--Design, Power transistors--Design
Format
Document (PDF)