Control And Stability Enhancement Of Grid Interactive Voltage Source Inverters Under Grid Abnormalities
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Control And Stability Enhancement Of Grid Interactive Voltage Source Inverters Under Grid Abnormalities
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Author : Aswad Adib
language : en
Publisher:
Release Date : 2018
Control And Stability Enhancement Of Grid Interactive Voltage Source Inverters Under Grid Abnormalities written by Aswad Adib and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Voltage source inverters (VSIs) are an essential interface for grid integration of renewable energy resources. Grid-tied VSIs are employed in power grids to integrate distributed generation units, e.g. photovoltaic arrays, wind turbines and energy storage units, to the utility and extract the maximum energy from the DG units in an efficient manner. However, the stability of VSIs and by extension the entire DG system can be degraded under abnormal grid conditions. In this dissertation, new control and switching techniques for stability and power quality improvement of grid-tied VSIs under abnormal grid conditions are presented. For grids with a low inertia and a low short-circuit ratio, commonly referred to as weak grids, grid connection may make VSIs susceptible to voltage distortion and instability. In this dissertation, through root locus analysis of a detailed state-space model, the design of several circuit and control parameters of the grid-tied VSI are evaluated for improving stability in weak grids. It is shown that grid-side filter inductances can be increased for stable operation of VSIs in weak grids. Accordingly, a virtual inductance emulating the effect of an increased inductance in the grid-side filter is developed in this dissertation, which enables stable operation of VSIs in weak grids without the tradeoffs, i.e. additional voltage drop, increased cost and larger size, associated with a larger inductor. The virtual inductance scheme is realized through the injection of a feedforward current element in the VSI controller through a gain component. The measured grid currents, which are sensed for regular VSI controller operation, are employed as the feedforward component eliminating the need for any additional sensors for the utilization of this control scheme. Furthermore, a direct model reference adaptive control (MRAC) scheme is employed in this dissertation to tune the virtual inductance gain block according to a stable reference model for varying grid conditions. The use of direct MRAC scheme allows tuning of the virtual inductance block without the need for a plant parameter estimation stage. The virtual inductance scheme enables stable operation of VSIs in weak grids without system parameter redesign, thereby maintaining the steady-state performance of the system. The efficacy of the virtual inductance feedforward scheme is verified through hardware tests carried out on a three-phase grid-tied experimental setup. Along with extracting energy from the DG sources, grid-tied VSIs are capable of providing various ancillary services to the utility under abnormal conditions. However, providing ancillary services could drive the inverter voltages beyond the linear modulation region resulting in grid current distortions, which could violate the requirements for grid integration of DGs. An atypical pulse width modulation (PWM) technique is proposed in this dissertation, which maximizes the dc-bus utilization of VSIs, which in turn enables the VSIs to supply the maximum extracted power from the DG units to the grid when providing ancillary services while operating in the linear modulation region. The switching scheme is realized by injecting common mode components in the PWM references, computed based on instantaneous reference magnitudes. The proposed scheme is suitable when providing both symmetrical and asymmetrical ancillary services. In this dissertation, negative-sequence compensation and harmonic compensation are employed as instances of symmetrical and asymmetrical ancillary services. The proposed scheme can be integrated with any control scheme and carrier-based PWM combinations. The efficacy of the proposed atypical PWM scheme is verified through both simulation and hardware tests.
Energy And Environmental Aspects Of Emerging Technologies For Smart Grid
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Author : Surender Reddy Salkuti
language : en
Publisher: Springer Nature
Release Date : 2024-05-24
Energy And Environmental Aspects Of Emerging Technologies For Smart Grid written by Surender Reddy Salkuti and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-05-24 with Technology & Engineering categories.
This book presents mathematical models of various renewable energy sources (RESs) such as wind energy systems, solar PV systems, battery energy storage systems, pumped-storage hydropower, biomass, and electric vehicles (EVs). It also discusses the challenging task of the integration of high penetration of renewable energies and EVs within existing power systems. The uncertainty related to RESs, electric vehicle charging, and load demands is also modelled. The book provides illustrative and comprehensive practical case studies to enable a complete understanding of the proposed methodologies. This book will consider the nuances of all these new paradigms, smart grid components, technology, and the impact of energy storage, EVs, and distributed energy resources, in the power networks.
Recent Advances In Power Systems
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Author : Om Hari Gupta
language : en
Publisher: Springer Nature
Release Date : 2023-01-01
Recent Advances In Power Systems written by Om Hari Gupta and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-01-01 with Technology & Engineering categories.
This book presents select proceedings of the 3rd Electric Power and Renewable Energy Conference 2022 (EPREC 2022). This book provides rigorous discussions, case studies, and recent developments in the emerging areas of the power systems, especially renewable energy conversion systems, distributed generations, microgrids, smart grids, HVDC & FACTS, power system protection, etc. The readers would be benefited in terms of enhancing their knowledge and skills in the domain areas. The book will be a valuable reference for beginners, researchers, and professionals interested in developments in the power system.
Fundamentals Of Power Electronics
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Author : Kaushal Dhawan
language : en
Publisher: Educohack Press
Release Date : 2025-02-20
Fundamentals Of Power Electronics written by Kaushal Dhawan and has been published by Educohack Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-02-20 with Technology & Engineering categories.
"Fundamentals of Power Electronics" offers a comprehensive exploration of principles, applications, and advancements in power electronics. We provide a valuable resource for students, engineers, and researchers to understand the fundamental concepts and practical aspects of power electronic systems. We cover a wide range of topics, including semiconductor devices, power electronic converters, control techniques, and applications in renewable energy, electric vehicles, and industrial systems. Complex concepts are presented clearly and accessibly, with step-by-step explanations, illustrative examples, and detailed diagrams to aid comprehension. Real-world examples and case studies demonstrate the application of power electronics in various industries, offering insights into design considerations, performance optimization, and troubleshooting techniques. Each chapter is structured to facilitate learning, with learning objectives, summaries, review questions, and problem-solving exercises to reinforce understanding and retention of key concepts. The book incorporates the latest advancements in power electronics technology, including wide bandgap semiconductors, digital control techniques, and emerging applications such as wireless power transfer and Internet of Things (IoT) devices. "Fundamentals of Power Electronics" is an essential guide for mastering power electronics and its applications in today's technological landscape.
Electrical Electronics Abstracts
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Author :
language : en
Publisher:
Release Date : 1997
Electrical Electronics Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Electrical engineering categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Science Abstracts
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Author :
language : en
Publisher:
Release Date : 1993
Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Electrical engineering categories.
Grid Forming Power Inverters
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Author : Nabil Mohammed
language : en
Publisher: CRC Press
Release Date : 2023-02-28
Grid Forming Power Inverters written by Nabil Mohammed and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-02-28 with Technology & Engineering categories.
Grid-Forming Power Inverters: Control and Applications is the first book dedicated to addressing the operation principles, grid codes, modelling and control of grid-forming power inverters. The book initially discusses the need for this technology due to the substantial annual integration of inverter-based renewable energy resources. The key differences between the traditional grid-following and the emerging grid-forming inverters technologies are explained. Then, the book explores in detail various topics related to grid-forming power inverters, including requirements and grid standards, modelling, control, damping power system oscillations, dynamic stability under large fault events, virtual oscillator-controlled grid-forming inverters, grid-forming inverters interfacing battery energy storage, and islanded operation of grid-forming inverters. Features: Explains the key differences between grid-following and grid-forming inverters Explores the requirements and grid standards for grid-forming inverters Provides detailed modelling of virtual synchronous generators Explains various control strategies for grid-forming inverters Investigates damping of power system oscillations using grid-forming converters Elaborates on the dynamic stability of grid-forming inverters under large fault events Focuses on practical applications
Stability Enhancement Methods Of Inverters Based On Lyapunov Function Predictive Control And Reinforcement Learning
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Author : Xin Zhang
language : en
Publisher: Springer Nature
Release Date : 2022-11-29
Stability Enhancement Methods Of Inverters Based On Lyapunov Function Predictive Control And Reinforcement Learning written by Xin Zhang and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-11-29 with Technology & Engineering categories.
This book introduces a family of large-signal stability-based control methods for different power inverters (grid-connected inverter, standalone inverter, single-phase inverter, and three-phase inverter) in practical applications. Power inverters have stability issues, which include the inverter's own instability as well as the inverter's instability in relation to the other power electronic devices in the system (i.e., weak grid and the EMI filter). Most of the stability analyses and solutions are based on small-signal stability technology. Unfortunately, in actuality, the majority of practical instability concerns in power inverter systems are large-signal stability problems, which, when compared to small-signal stability problems, can cause substantial damage to electrical equipment. As a result, researchers must conduct a comprehensive investigation of the large-signal stability challenge and solutions for power inverters. This book can be used as a reference for researchers, power inverters manufacturers, and end-users. As a result, the book will not become obsolete in the near future, regardless of technology advancements.
Control And Filter Design Of Single Phase Grid Connected Converters
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Author : Weimin Wu
language : en
Publisher: John Wiley & Sons
Release Date : 2022-12-28
Control And Filter Design Of Single Phase Grid Connected Converters written by Weimin Wu 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 2022-12-28 with Technology & Engineering categories.
Control and Filter Design of Single-Phase Grid-Connected Converters A state-of-the-art discussion of modern grid inverters In Control and Filter Design of Single-Phase Grid-Connected Converters, a team of distinguished researchers deliver a robust and authoritative treatment of critical distributed power generation technologies, grid-connected inverter designs, and renewable energy utilization. The book includes detailed explanations of the system structure of distributed generation (DG)-grid interface converters and the methods of controlling DG-grid interface voltage source converters (VSCs) with high-order filters. The authors also explore the challenges and obstacles associated with modern power electronic grid-connected inverter control technology and introduce some designed systems that meet these challenges, such as the grid impedance canceller. Readers will discover demonstrations of basic principles, guidelines, examples, and design and simulation programs for grid-connected inverters based on LCL/LLCL technology. They will also find: A thorough introduction to the architectures of DG-grid interfacing converters, including the challenges of controlling DG-grid interfacing VSCs with high-order filters Comprehensive explorations of the control structure and modulation techniques of single-phase grid-tied inverters Practical discussions of an LLCL power filter for single-phase grid-tied inverters Fulsome treatments of design methods of passive damping for LCL/LLCL-filtered grid-tied inverters Perfect for researchers, postgraduate students, and senior level undergraduate students of electrical engineering, Control and Filter Design of Single-Phase Grid-Connected Converters will also benefit research & development engineers involved with the design and manufacture of power electronic inverters.