Development of Two-variable Maximum Power Point Tracking Control for Ocean Wave Energy Converters Utilizing a Power Analysis and Data Acquisition System PDF Download

Author: Ean A. Amon
Publisher:
ISBN:
Category : Electric current converters
Languages : en
Pages : 206

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Book Description
Ocean wave energy shows great potential as a developing form of renewable energy. However, challenges arise in maturing this technology to achieve cost-effective energy conversion. Development and testing of wave energy converters can be problematic due to the harsh environment in which they are operated. To promote development of this technology, a platform is needed for comprehensive testing of these devices in this harsh environment. This will allow the determination of optimal topologies and control of wave energy converters for maximum power extraction. This work evaluates maximum power point tracking control in wave energy converters and presents two-variable maximum power point tracking control algorithms. A robust testing platform is developed for evaluating wave energy converters in the ocean environment. This testing platform is utilized in obtaining experimental data used in validating simulation results of the investigated control approaches.

Author: Taofeek Orekan
Publisher: Springer
ISBN: 3030025624
Category : Technology & Engineering
Languages : en
Pages : 106

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Book Description
This book discusses, for the first time, wireless power transfer in the ocean environment. Topics covered include power electronic techniques, advanced control strategies, as well as classic and emerging applications such as smart ocean energy systems and wireless power transfer and charging of underwater autonomous vehicles. Emerging research topics are presented, along with methodologies, approaches, and industrial development of intelligent and energy-efficient techniques. Apart from the basic principles with an emphasis on inductive power transfer and mathematical analysis, the book discusses the emerging implementation for underwater wireless power transfer such as energy encryption, power and data transfer through common links, and secured data- and cyber-security. Specifically, the book comprehensively introduces significant discussions on UWPT coil theoretical and experimental analysis in seawater, optimal design, and intelligent controls. For example, since fast communication is not viable in an underwater environment, the proposed book discusses Maximum Power Efficiency Tracking (MPET) control, which achieves a maximum power efficiency (>85%) without communication or feedback from the transmitting side of the UWPT system. A k-nearest-neighbors-based machine learning approach is used to estimate the coupling coefficiency between the coils. This machine learning-based intelligent control method can offer important guidance for graduate students, academic researchers, and industrial engineers who want to understand the working principles and realize the developing trends in underwater wireless power transfer. Finally, the book includes details on the modeling and design of a smart ocean energy system--a new type of power harvesting system designed to convert ocean energy into electricity, which has the capability of making underwater wireless power connections with distributed marine devices.

Author: Mohamed Ezzat Salem
Publisher: GRIN Verlag
ISBN: 3640946502
Category : Technology & Engineering
Languages : en
Pages : 14

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Book Description
Scientific Study from the year 2004 in the subject Electrotechnology, , language: English, abstract: This paper proposes an intelligent control method for the maximum power point tracking (MPPT) of a photovoltaic system under variable temperature and insolation conditions. This method uses a fuzzy logic controller applied to a DC-DC converter device. The different steps of the design of this controller are presented together with its simulation. The PV system that I chose to simulate to apply my techniques on it is stand-alone PV water pumping system. Results of this simulation are compared to those obtained by the system without MPPT. They show that the system with MPPT using fuzzy logic controller increase the efficiency of energy production from PV.

Author: Terrance Michael Lettenmaier
Publisher:
ISBN:
Category : Automatic data collection systems
Languages : en
Pages : 172

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Book Description
Ocean testing of Wave Energy Converter (WEC) prototypes is necessary to facilitate commercial WEC development. The Ocean Sentinel Instrumentation Buoy, completed in August 2012, provides a stand-alone load for WEC prototypes during ocean testing. The first part of this work was to develop the power conversion and data acquisition equipment installed on board the Ocean Sentinel that is used to test WECs. The functionality of this equipment was demonstrated during August-October 2012 ocean testing of the half-scale WET-NZ wave energy converter. WET-NZ is an acronym for "Wave Energy Technology-New Zealand". The second part of this work was to develop a maximum power point tracking (MPPT) algorithm that can automatically track optimum control settings of WECs as sea conditions change. During the WET-NZ tests, a cycling MPPT algorithm was developed that provided more effective tracking of the optimum WET-NZ control input than was possible with standard perturb and observe MPPT algorithms. The effectiveness of the cycling MPPT algorithm was verified later during more systematic testing of MPPT algorithms using a WEC emulator, developed as part of this project, to simulate WEC operation.

Author: Dezhi Ning
Publisher: CRC Press
ISBN: 1000629112
Category : Technology & Engineering
Languages : en
Pages : 384

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Book Description
Wave energy offers a promising renewable energy source, however, technologies converting wave energy into useful electricity face many design challenges. This guide presents numerical modelling and optimization methods for the development of wave energy converter technologies, from principles to applications. It covers the development status and perspectives of wave energy converter systems; the fundamental theories on wave power absorption; the modern wave energy converter concepts including oscillating bodies in single and multiple degree of freedom and oscillating water column technologies; and the relatively hitherto unexplored topic of wave energy harvesting farms. It can be used as a specialist student textbook as well as a reference book for the design of wave energy harvesting systems, across a broad range of disciplines, including renewable energy, marine engineering, infrastructure engineering, hydrodynamics, ocean science, and mechatronics engineering. The Open Access version of this book, available at www.routledge.com has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.

Author: Taofeek A. Orekan
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages :

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Book Description
Ocean energy offers the highest energy density when compared to other renewable energy resources, and its energy potentials is enormous. As ocean energy converter technology continues to advance, vigorous testing methodology, new design modeling, and assessments of the device performances under different wave conditions become critically important. This work presents the development of a new type of wave energy converter, Smart-WEC, from concept to prototype stage. It utilizes a direct drive linear generator to extract energy from the motion of ocean waves. An integrated dynamic model of Smart-WEC is developed to evaluate its dynamic behavior. Furthermore, Smart-WEC has the capability of making connections with underwater ocean technologies, such as autonomous underwater vehicles and ocean sensors, through a novel underwater wireless power transfer technology. In an effort to assure the energy resilience and maximum power absorption and power transferred, this dissertation addresses the limitations of conventional ocean energy converter technologies to allow a more robust, smart and reliable system. New control methods are explored and implemented: (1) a novel maximum power efficiency tracking (MPET) control that uses k-nearest neighbors to estimate the system's coupling coefficient and tracks the peak efficiency (>85%) through an adaptive converter control; (2) a maximum life cycle tracking control that minimizes the torques stress on tidal shaft and therefore maximizes the energy absorbed by tracking the power-speed curves; and (3) a model predictive control that calculates the power electronic converter voltage needed to force the measured current to its reference value, thereby maximizing power generated by Smart-WEC.

Author: Tianjia Chen
Publisher:
ISBN: 9781303677892
Category :
Languages : en
Pages : 44

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Book Description
Ocean waves bear huge, largely untapped energy which has drawn people's attention in recent decades. With the technology of wave-energy converters(WECs), the extraction of wave energy involves the process of energy conversion, which relates to the concern of efficiency as well as the constraints it introduces. In this work, we consider the problem of power maximization in wave-energy converters modeled as point-absorbers. We focus on the method of sampled-data extremum-seeking, where we give assumptions based on which the semiglobal practical asymptotic stability of the interconnected system is characterized. It is worth noting that the novelty lies in our assumptions on the discrete-time class of systems and constrained control inputs. Besides the exploration in the theoretical aspect, we also propose the Numerical Extremum-Seeking (NES) algorithm for the plant of WEC. We prove that it is capable of solving the power maximization problem while ensuring the stability of the system. The analysis of NES algorithm is based on the aforementioned theory along with a Poincare map technique and a gradient-projection method. Finally, we show the functionality of the proposed algorithm in simulation results. In addition to the regular-wave condition, we present the simulation for a more practical scenario, i.e., the irregular-wave case.

Author: Chandra Babu P
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
Performance improvement of maximum power point tracking (MPPT) controllers focuses on enhancing the effectiveness, accuracy, and efficiency of MPPT algorithms and techniques used in photovoltaic (PV) systems. The primary goal is to optimize power extraction from PV panels by continuously tracking and maintaining the system's operation at the maximum power point (MPP) under varying environmental conditions. The performance improvement of MPPT controllers involves several aspects, including algorithm design, control strategies, and system optimization. Researchers and engineers work on developing advanced MPPT algorithms that offer better tracking accuracy, faster response time, and improved stability compared to traditional techniques. One area of focus is algorithm design, where novel MPPT algorithms are developed or existing algorithms are enhanced to overcome limitations and improve performance. These algorithms utilize sensor measurements, such as PV panel voltage, current, and irradiance, to dynamically adjust the operating point of the PV system for maximum power extraction. Advanced techniques, such as adaptive algorithms, fuzzy logic, neural networks, and machine learning, may be employed to optimize the tracking efficiency and adaptability of the MPPT controllers. Another aspect is control strategy improvement, where the control parameters and feedback loops of the MPPT controllers are optimized. This involves carefully tuning the control parameters to ensure stable and efficient operation of the MPPT system. The feedback loops are designed to accurately measure and adjust the system's operating conditions, compensating for variations in solar irradiance, temperature, and load changes. Robust control techniques are implemented to handle uncertainties and disturbances, improving the overall performance of the MPPT controller. System optimization is also crucial for performance improvement. This includes considering factors such as PV panel characteristics, converter topologies, sensor placement, and communication interfaces. Optimizing these system parameters ensures compatibility and efficient operation of the MPPT controllers, leading to improved power extraction and higher energy yield from the PV system. To evaluate the performance improvement of MPPT controllers, simulations and experimental tests are conducted. Various operating conditions, such as different solar irradiance levels, temperature variations, shading effects, and load profiles, are considered to assess the controllers' effectiveness under real-world scenarios. Performance metrics, such as tracking accuracy, convergence speed, energy yield, and power losses, are analyzed to quantify the improvement achieved by the enhanced MPPT controllers. Overall, the performance improvement of MPPT controllers aims to enhance the energy conversion efficiency, increase power output, and maximize the utilization of solar energy in PV systems. It contributes to the advancement of renewable energy technologies, making PV systems more efficient, reliable, and economically viable for a wide range of applications.

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 440

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Book Description

Author: Aurelien Babarit
Publisher: Elsevier
ISBN: 0081023901
Category : Technology & Engineering
Languages : en
Pages : 264

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Book Description
The waves that animate the surface of the oceans represent a deposit of renewable energy that for the most part is still unexploited today. This is not for lack of effort, as for more than two hundred years inventors, researchers and engineers have struggled to develop processes and systems to recover the energy of the waves. While all of these efforts have failed to converge towards a satisfactory technological solution, the result is a rich scientific and technical literature as well as extensive and varied feedback from experience. For the uninitiated, this abundance is an obstacle. In order to facilitate familiarization with the subject, we propose in this work a summary of the state of knowledge on the potential of wave energy as well as on the processes and technologies of its recovery (wave energy converters). In particular, we focus on the problem of positioning wave energy in the electricity market, the development of wave energy conversion technologies from a historical perspective, and finally the energy performance of the devices. This work is aimed at students, researchers, developers, industry professionals and decision makers who wish to acquire a global perspective and the necessary tools to understand the field. Reviews the state of knowledge and developments on wave energy recovery Presents the history of wave energy recovery Classifies the various systems for recovering this type of energy