Power Quality And Efficiency Improvements For Transformerless Grid Connected Pv Inverters
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Power Quality And Efficiency Improvements For Transformerless Grid Connected Pv Inverters
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Author : Leslie Alan Bowtell
language : en
Publisher:
Release Date : 2010
Power Quality And Efficiency Improvements For Transformerless Grid Connected Pv Inverters written by Leslie Alan Bowtell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Electric power production categories.
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.
Transformer Less Photovoltaic Grid Connected Inverter With Power Quality Regulation
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Author : Ch Venkata Ramesh
language : en
Publisher: Mohammed Abdul Sattar
Release Date : 2024-03-19
Transformer Less Photovoltaic Grid Connected Inverter With Power Quality Regulation written by Ch Venkata Ramesh and has been published by Mohammed Abdul Sattar this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-03-19 with Technology & Engineering categories.
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.
Low Voltage Ride Through Capability And Improvement Of Power Quality In Hybrid Wind Pv Farms Grid Connected Using Dynamic Voltage Restorer
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Author : Dr T. Himabindu
language : en
Publisher: Archers & Elevators Publishing House
Release Date :
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 has been published by Archers & Elevators Publishing House this book supported file pdf, txt, epub, kindle and other format this book has been release on with Antiques & Collectibles categories.
Computational Paradigm Techniques For Enhancing Electric Power Quality
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Author : L. Ashok Kumar
language : en
Publisher: CRC Press
Release Date : 2018-11-15
Computational Paradigm Techniques For Enhancing Electric Power Quality written by L. Ashok Kumar and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-15 with Mathematics categories.
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
Power Electronic Converter Configuration And Control For Dc Microgrid Systems
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Author : Jens Bo Holm-Nielsen
language : en
Publisher: MDPI
Release Date : 2020-11-13
Power Electronic Converter Configuration And Control For Dc Microgrid Systems written by Jens Bo Holm-Nielsen and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-11-13 with Technology & Engineering categories.
The DC/AC microgrid system is a crucial empowering technology for the integration of various types of renewable energy sources (RES) accompanied by a smart control approach to enhance the system reliability and efficiency. This book presents cutting-edge technology developments and recent investigations performed with the help of power electronics. Large-scale renewable energy integration presents challenges and issues for power grids. In particular, these issues include microgrid adaption to RES, AC machines, the new configuration of AC/DC converters, and electrification of domestic needs with optimal cost expenses from domestic standalone microgrids. Furthermore, this book elaborates cutting-edge developments in electric vehicle fast charging configuration, battery management, and control schemes with renewable energies through hardware-in-loop testing and validation for performance durability in real-time application. Overall, the book covers the diverse field of microgrids, allowing readers to adopt new technologies and prepare for future power demands with sustainable green engineering.
Advances In Control Systems And Its Infrastructure
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Author : Axaykumar Mehta
language : en
Publisher: Springer Nature
Release Date : 2019-11-26
Advances In Control Systems And Its Infrastructure written by Axaykumar Mehta and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-11-26 with Technology & Engineering categories.
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.
Transformerless Photovoltaic Grid Connected Inverters
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Author : Huafeng Xiao
language : en
Publisher: Springer Nature
Release Date : 2020-10-29
Transformerless Photovoltaic Grid Connected Inverters written by Huafeng Xiao and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-29 with Technology & Engineering categories.
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.
Optimization For Control Observation And Safety
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Author : Guillermo Valencia-Palomo
language : en
Publisher: MDPI
Release Date : 2020-04-01
Optimization For Control Observation And Safety written by Guillermo Valencia-Palomo and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-01 with Technology & Engineering categories.
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.
Grid Converters For Photovoltaic And Wind Power Systems
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Author : Remus Teodorescu
language : en
Publisher: John Wiley & Sons
Release Date : 2011-07-28
Grid Converters For Photovoltaic And Wind Power Systems written by Remus Teodorescu and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-07-28 with Technology & Engineering categories.
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
Enhanced Voltage Sourced Inverters For Large Scale Grid Connected Photovoltaic Systems
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Author : Hamidreza Ghoddami
language : en
Publisher:
Release Date : 2013
Enhanced Voltage Sourced Inverters For Large Scale Grid Connected Photovoltaic Systems written by Hamidreza Ghoddami and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
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.