Download or read book Power Quality and Efficiency Improvements for Transformerless Grid Connected PV Inverters written by Leslie Alan Bowtell and published by . This book was released on 2010 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is currently significant growth in the number of residential scale grid connected photovoltaic (PV) systems. Generally, if environmental costs are not accounted for, the cost of generation from PV sources remains high compared to conventionally generated electricity. There is, therefore, a strong incentive to reduce the cost of PV systems and improve their efficiency while satisfying injected power quality standards. The focus has been on the power electronic single phase converter bridge which is typically used as interface between the DC output of the PV panels and the terminals of the AC network. One of the two main objectives was to investigate the possibility of operating an inverter connected to the AC grid without an interfacing power transformer, while keeping DC injection into the grid below levels specified by Australian and International Standards. A low cost method of controlling the DC offset content of the current injected into the AC mains has been proposed. A mathematical model of the DC offset controller has been developed and experimentally validated. A design procedure for the controller has also been developed. The second objective was to investigate the dependence of efficiency on inverter switching strategies such as bipolar and unipolar switching. It was confirmed by specially designed tests that unipolar switching meant significantly lower switching losses when compared with bipolar switching. However, the quality of current injected into the AC mains in the case of unipolar switching was not considered acceptable because of significant current distortion near the AC mains voltage zero crossing. A new method of inverter switching has been proposed which exploits the efficiency advantage of unipolar switching while avoiding the problem of current distortion. The main outcomes of this project are a DC offset controller which allow transformerless operation and an inverter switching strategy that results in significantly reduced switching losses while maintaining the quality of injected current. Implementation of the proposed DC offset controller and inverter switching strategy will result in both capital cost savings and higher conversion efficiency.

Download or read book Transformerless Photovoltaic Grid Connected Inverters written by Huafeng Xiao and published by Springer Nature. This book was released on 2020-10-29 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on a safety issue in terms of leakage current, builds a common-mode voltage analysis model for TLIs at switching frequency scale and develops a new modulation theory referred as “Constant Common-Mode Voltage Modulation” to eliminate the leakage current of TLIs. Transformerless Grid-Connected Inverter (TLI) is a circuit interface between photovoltaic arrays and the utility, which features high conversion efficiency, low cost, low volume and weight. The detailed theoretical analysis with design examples and experimental validations are presented from full-bridge type, half-bridge type and combined topologies. This book is essential and valuable reference for graduate students and academics majored in power electronics; engineers engaged in developing distributed grid-connected inverters; senior undergraduate students majored in electrical engineering and automation engineering.

Download or read book High Frequency Soft Switching Transformerless Grid Connected Inverters written by Huafeng Xiao and published by Springer Nature. This book was released on 2022-07-14 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is essential and valuable reference for graduate students and academics majored in power electronics, engineers engaged in developing distributed grid-connected inverters, and senior undergraduate students majored in electrical engineering and automation engineering. Soft-switching (SS) technique is an important way to achieve high conversion efficiency and high switching frequency for power converters, which is beneficial to improve power density and reduce volume and cost of power electronics equipment. This book mainly discusses SS technique for transformerless grid-connected inverters (TLIs), and a SS configuration named as “Freewheeling-Resonance-Tank Inverters” is proposed for TLIs fulfilling requirements of switching loss-free, full power factor range, and constant common-mode voltage performance. The detailed theoretical analysis and experimental validations are presented from ZCT and ZVT type topologies, respectively.

Download or read book Emerging Converter Topologies and Control for Grid Connected Photovoltaic Systems written by Dmitri Vinnikov and published by MDPI. This book was released on 2021-02-26 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuous cost reduction of photovoltaic (PV) systems and the rise of power auctions resulted in the establishment of PV power not only as a green energy source but also as a cost-effective solution to the electricity generation market. Various commercial solutions for grid-connected PV systems are available at any power level, ranging from multi-megawatt utility-scale solar farms to sub-kilowatt residential PV installations. Compared to utility-scale systems, the feasibility of small-scale residential PV installations is still limited by existing technologies that have not yet properly address issues like operation in weak grids, opaque and partial shading, etc. New market drivers such as warranty improvement to match the PV module lifespan, operation voltage range extension for application flexibility, and embedded energy storage for load shifting have again put small-scale PV systems in the spotlight. This Special Issue collects the latest developments in the field of power electronic converter topologies, control, design, and optimization for better energy yield, power conversion efficiency, reliability, and longer lifetime of the small-scale PV systems. This Special Issue will serve as a reference and update for academics, researchers, and practicing engineers to inspire new research and developments that pave the way for next-generation PV systems for residential and small commercial applications.

Download or read book LOW VOLTAGE RIDE THROUGH CAPABILITY AND IMPROVEMENT OF POWER QUALITY IN HYBRID WIND PV FARMS GRID CONNECTED USING DYNAMIC VOLTAGE RESTORER written by Dr T. Himabindu and published by Archers & Elevators Publishing House. This book was released on with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Techno Societal 2020 written by Prashant M. Pawar and published by Springer Nature. This book was released on 2021-06-19 with total page 1090 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, divided in two volumes, originates from Techno-Societal 2020: the 3rd International Conference on Advanced Technologies for Societal Applications, Maharashtra, India, that brings together faculty members of various engineering colleges to solve Indian regional relevant problems under the guidance of eminent researchers from various reputed organizations. The focus of this volume is on technologies that help develop and improve society, in particular on issues such as advanced and sustainable technologies for manufacturing processes, environment, livelihood, rural employment, agriculture, energy, transport, sanitation, water, education. This conference aims to help innovators to share their best practices or products developed to solve specific local problems which in turn may help the other researchers to take inspiration to solve problems in their region. On the other hand, technologies proposed by expert researchers may find applications in different regions. This offers a multidisciplinary platform for researchers from a broad range of disciplines of Science, Engineering and Technology for reporting innovations at different levels.

Download or read book Solar Inverter Design with Improved Performance written by Mona Reyes and published by Mona Reyes. This book was released on 2024-05-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The article titled "Solar Inverter Design with Improved Performance" Mona Reyes discusses the design and development of a solar photovoltaic-fed modular multilevel inverter that offers improved power quality and efficiency. The paper explores the various aspects of solar inverters, including power electronics, power conditioning, and power conversion. The author delves into the key issues that need to be addressed to improve the performance of solar inverters, such as maximum power point tracking (MPPT), voltage and current regulation, reactive power compensation, harmonic distortion, power factor correction, and pulse width modulation (PWM). The article also discusses various control methods, such as hysteresis control, sliding mode control, fuzzy logic control, neural networks, and artificial intelligence, that can be used to optimize the performance of solar inverters. Furthermore, the paper highlights the importance of circuit design and electrical engineering in designing solar inverters, and explains how optimization techniques can be used to improve their performance. The article also covers various types of renewable energy systems, including grid-connected systems, stand-alone systems, and microgrid systems, and explores how solar inverters can be integrated with energy storage systems and battery systems to provide a more stable and reliable power supply. Additionally, the article discusses the role of solar inverters in smart grid systems and provides an overview of power control and switching control. The author uses simulation models to analyze the performance of solar inverters and highlights the importance of power system stability and control for efficient and reliable power supply.

Download or read book Enhanced Voltage sourced Inverters for Large scale Grid connected Photovoltaic Systems written by Hamidreza Ghoddami and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is mainly focused on (i) modeling of large-scale PV systems in order to study the factors that influence the capacity, efficiency, power quality and safety in connection with the power grid and (ii) proposing system- and circuit-level solutions and control strategies/techniques to improve the aforementioned factors. To that end, a model for PV array is developed to study the mismatch power loss in different PV array interconnection methods, especially during the partial shading condition. Further, a two-MPPT structure is proposed to reduce the mismatch power loss in centrally structured PV systems. Then, a single-stage VSC-based system is proposed to utilize the two-MPPT structure for better efficiency. The proposed system also doubles the DC-link voltage while respecting the safety standards, which in turn, increases the capacity and the efficiency of the central inverter. To further improve capacity and efficiency, a two-stage system is proposed in which the variable MPP voltage of smaller sub-arrays are regulated, by dedicated DC-DC boost converters, at the inverter DC-side terminals. This lets the inverter use the full DC voltage permissible rating and reduces the ohmic loss in DC and AC wirings and in the transformer. The system employs a three-level NPC inverter which generates output with better power quality, facilitates the adoption of two-MPPT structure, and permits utilizing low-voltage (half-rated) switches. The system also promotes the modular/distributed structure which improves the efficiency under partial shading and enables the possibility of utilizing PV modules of different types, ratings, and alignments. Finally, a mitigation technique is proposed in the inverter and grid-interface structures to prevent formation of damaging temporary overvoltages, which sometimes are produced in power systems by distributed generations including PV. The technique utilizes a fourleg inverter connected to a grid through a Y/YG isolation transformer. The effectiveness of the proposed techniques and control strategies are demonstrated through time-domain simulation studies conducted in the PSCAD/EMTDC software environment.

Download or read book Design and Control of Grid Connected Photovoltaic System written by Ahteshamul Haque and published by CRC Press. This book was released on 2023-04-28 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current model for electricity generation and distribution is dominated by centralized power plants which are typically associated with combustion (coal, oil, and natural gas) or nuclear generation units. These power models require distribution from the center to outlying consumers and have many disadvantages concerning the electric utilities, transmission and distribution, and greenhouse gas emissions. This resulted in the modelling and development of cleaner renewable power generation with alternative sources such as photovoltaic (PV), wind, and other sources. Further, due to matured PV technology, constant drop-in installation cost, greenhouse emissions reductions, energy efficiency, reduced transmission and distribution investments, minimization of electric losses, and network support, the development of PV systems is proliferating. In view of this development, this book provides an idea for setting up the PV plant from initial study of the site to plan sizing. Once the first planning is covered, the book focuses on the modeling aspects of power electronics converter and control elements associated with it keeping the operating standards specified for the development of distributed generation systems in check. This book will be useful for industrial professionals and researchers who are working toward modeling of PV plants, and their control in grid connected operation. All the necessary information related to these fields is available in the book.

Download or read book Grid Converters for Photovoltaic and Wind Power Systems written by Remus Teodorescu and published by John Wiley & Sons. This book was released on 2011-07-28 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grid converters are the key player in renewable energy integration. The high penetration of renewable energy systems is calling for new more stringent grid requirements. As a consequence, the grid converters should be able to exhibit advanced functions like: dynamic control of active and reactive power, operation within a wide range of voltage and frequency, voltage ride-through capability, reactive current injection during faults, grid services support. This book explains the topologies, modulation and control of grid converters for both photovoltaic and wind power applications. In addition to power electronics, this book focuses on the specific applications in photovoltaic wind power systems where grid condition is an essential factor. With a review of the most recent grid requirements for photovoltaic and wind power systems, the book discusses these other relevant issues: modern grid inverter topologies for photovoltaic and wind turbines islanding detection methods for photovoltaic systems synchronization techniques based on second order generalized integrators (SOGI) advanced synchronization techniques with robust operation under grid unbalance condition grid filter design and active damping techniques power control under grid fault conditions, considering both positive and negative sequences Grid Converters for Photovoltaic and Wind Power Systems is intended as a coursebook for graduated students with a background in electrical engineering and also for professionals in the evolving renewable energy industry. For people from academia interested in adopting the course, a set of slides is available for download from the website. www.wiley.com/go/grid_converters

Download or read book Optimization for Control Observation and Safety written by Guillermo Valencia-Palomo and published by MDPI. This book was released on 2020-04-01 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical optimization is the selection of the best element in a set with respect to a given criterion. Optimization has become one of the most used tools in control theory to compute control laws, adjust parameters (tuning), estimate states, fit model parameters, find conditions in order to fulfill a given closed-loop property, among others. Optimization also plays an important role in the design of fault detection and isolation systems to prevent safety hazards and production losses that require the detection and identification of faults, as early as possible to minimize their impacts by implementing real-time fault detection and fault-tolerant systems. Recently, it has been proven that many optimization problems with convex objective functions and linear matrix inequality (LMI) constraints can be solved easily and efficiently using existing software, which increases the flexibility and applicability of the control algorithms. Therefore, real-world control systems need to comply with several conditions and constraints that have to be taken into account in the problem formulation, which represents a challenge in the application of the optimization algorithms. This book offers an overview of the state-of-the-art of the most advanced optimization techniques and their applications in control engineering.

Download or read book Computational Paradigm Techniques for Enhancing Electric Power Quality written by L. Ashok Kumar and published by CRC Press. This book was released on 2018-11-15 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focusses on power quality improvement and enhancement techniques with aid of intelligent controllers and experimental results. It covers topics ranging from the fundamentals of power quality indices, mitigation methods, advanced controller design and its step by step approach, simulation of the proposed controllers for real time applications and its corresponding experimental results, performance improvement paradigms and its overall analysis, which helps readers understand power quality from its fundamental to experimental implementations. The book also covers implementation of power quality improvement practices. Key Features Provides solution for the power quality improvement with intelligent techniques Incorporated and Illustrated with simulation and experimental results Discusses renewable energy integration and multiple case studies pertaining to various loads Combines the power quality literature with power electronics based solutions Includes implementation examples, datasets, experimental and simulation procedures

Download or read book Distributed Energy Resources in Microgrids written by Rajeev Kumar Chauhan and published by Academic Press. This book was released on 2019-08-17 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed Energy Resources in Microgrids: Integration, Challenges and Optimization unifies classically unconnected aspects of microgrids by considering them alongside economic analysis and stability testing. In addition, the book presents well-founded mathematical analyses on how to technically and economically optimize microgrids via distributed energy resource integration. Researchers and engineers in the power and energy sector will find this information useful for combined scientific and economical approaches to microgrid integration. Specific sections cover microgrid performance, including key technical elements, such as control design, stability analysis, power quality, reliability and resiliency in microgrid operation. - Addresses the challenges related to the integration of renewable energy resources - Includes examples of control algorithms adopted during integration - Presents detailed methods of optimization to enhance successful integration

Download or read book Power Quality Improvement of Grid Connected Photovoltaic Inverters written by Matthew Armstrong and published by . This book was released on 2007 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Power Inverters in Renewable Energy and Smart Grid Integration written by Qing-Chang Zhong and published by John Wiley & Sons. This book was released on 2012-11-16 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating renewable energy and other distributed energy sources into smart grids, often via power inverters, is arguably the largest “new frontier” for smart grid advancements. Inverters should be controlled properly so that their integration does not jeopardize the stability and performance of power systems and a solid technical backbone is formed to facilitate other functions and services of smart grids. This unique reference offers systematic treatment of important control problems in power inverters, and different general converter theories. Starting at a basic level, it presents conventional power conversion methodologies and then ‘non-conventional’ methods, with a highly accessible summary of the latest developments in power inverters as well as insight into the grid connection of renewable power. Consisting of four parts – Power Quality Control, Neutral Line Provision, Power Flow Control, and Synchronisation – this book fully demonstrates the integration of control and power electronics. Key features include: the fundamentals of power processing and hardware design innovative control strategies to systematically treat the control of power inverters extensive experimental results for most of the control strategies presented the pioneering work on “synchronverters” which has gained IET Highly Commended Innovation Award Engineers working on inverter design and those at power system utilities can learn how advanced control strategies could improve system performance and work in practice. The book is a useful reference for researchers who are interested in the area of control engineering, power electronics, renewable energy and distributed generation, smart grids, flexible AC transmission systems, and power systems for more-electric aircraft and all-electric ships. This is also a handy text for graduate students and university professors in the areas of electrical power engineering, advanced control engineering, power electronics, renewable energy and smart grid integration.

Download or read book Advances in Control Systems and its Infrastructure written by Axaykumar Mehta and published by Springer Nature. This book was released on 2019-11-26 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers selected research papers presented at the International Conference on Power, Control and Communication Infrastructure 2019 (ICPCCI 2019), organized by the Institute of Infrastructure, Technology, Research and Management (IITRAM), Ahmedabad, Gujarat, India, on July 4–5, 2019. It presents the latest advances, trends and challenges in control system technologies and infrastructures. The book addresses a range of solutions to the problems faced by engineers and researchers to design and develop controllers for emerging areas like smart grid, integration of renewable energy, automated highway systems, haptics, unmanned aerial vehicles, sensor networks, robotics, formation control and many more. The solutions discussed in this book encourage and inspire researchers, industry professionals and policymakers to put these methods into practice.

Download or read book Transformer Less Photovoltaic Grid Connected Inverter with Power Quality Regulation written by Ch Venkata Ramesh and published by Mohammed Abdul Sattar. This book was released on 2024-03-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The world's population and infrastructure have led to an ever-increasing need for other forms of energy and electricity. In order to accommodate the rising demand for other forms of energy and electricity, traditional power plants like hydroelectric dams and thermal power plants may be expanded. Traditional power plants have a number of drawbacks, including the production of greenhouse gases, the need for extensive building space, and the need for a steady supply of raw materials in order to generate electricity. For the reasons described above, a renewable power plant or a non-conventional power plant has been constructed. Wind, solar, wave, and ocean technologies are all examples of renewable energy sources. Compared to other renewable energy plants, the production cost of the photo voltaic (PV) panel for the solar PV system is quite cheap. This makes the solar PV system attractive to the existing electrical energy generating industry. Grid-connected solar photovoltaic systems have improved conversion efficiency, but they still face intermittent power generation and dynamic energy demand. Solar PV systems connected to the network can benefit from the addition of an energy storage system.