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Microgrids And Methods Of Analysis

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Microgrids and Methods of Analysis

Microgrids and Methods of Analysis Book
Author : Gevork B. Garehpetian,Hamid Reza Baghaee,Masoud M. Shabestary
Publisher : Academic Press
Release : 2021-07-23
ISBN : 0128165855
Language : En, Es, Fr & De

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Book Description :

The increasing penetration of distributed energy resource (DER), distributed generation (DG) and energy storage system (ESS) units in distribution grids leads to the emergence of the concepts of active distribution networks (ADNs), microgrids, and virtual power plants. Nowadays, the use of electronically-coupled distributed energy resources is of great interest that can provide the power of demand side alone or in a small electricity grid. A microgrid is a small-scale power grid in low voltage network that must be able to locally solve energy issues and enhance the flexibility and can operate either in grid-connected or islanded/autonomous mode of operation. To study them, researchers need an appropriate set of methods, software tools, analogous to those exist for large interconnected power systems. The book Microgrids and Methods of Analysis addresses systematic analysis, control/protection systems design, and optimal operation of a distribution system under high penetration of DERs analogous to those that exist for large interconnected power systems. Provides professional guidlines for system planners Explores further research, development, and optimization of existing and new microgrids Addresses analytical methods used for microgrid analysis using advanced research

Transient Characteristics Modelling and Stability Analysis of Microgrid

Transient Characteristics  Modelling and Stability Analysis of Microgrid Book
Author : Zhikang Shuai
Publisher : Springer Nature
Release : 2020-10-31
ISBN : 9811584036
Language : En, Es, Fr & De

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Book Description :

The book focuses on the transient modelling, stability analysis and control of power electronic systems, since these systems face severe safe operation problems the during transient period. It discusses both theoretical analysis and practical applications, highlighting the transient characteristics of converters with different control strategies, and proposes transient modelling and model reduction methods. Furthermore, it classifies the transient stability problems of the system to help the readers gain an understanding of the basic theoretical methods for analysing the power electronic system, at the same time providing sufficient detail to enable engineers to design such systems. Comprehensively describing theoretical analyses, ranging from system modelling and stability analysis to transient control, the book is a valuable resource for researchers, engineers and graduate students in fields of transient modelling, stability analysis and control of power electronic systems.

Microgrid Architectures Control and Protection Methods

Microgrid Architectures  Control and Protection Methods Book
Author : Naser Mahdavi Tabatabaei,Ersan Kabalci,Nicu Bizon
Publisher : Springer
Release : 2019-08-01
ISBN : 3030237230
Language : En, Es, Fr & De

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Book Description :

This book presents intuitive explanations of the principles of microgrids, including their structure and operation and their applications. It also discusses the latest research on microgrid control and protection technologies and the essentials of microgrids as well as enhanced communication systems. The book provides solutions to microgrid operation and planning issues using various methodologies including planning and modelling; AC and DC hybrid microgrids; energy storage systems in microgrids; and optimal microgrid operational planning. Written by specialists, it is filled in innovative solutions and research related to microgrid operation, making it a valuable resource for those interested in developing updated approaches in electric power analysis, design and operational strategies. Thanks to its in-depth explanations and clear, three-part structure, it is useful for electrical engineering students, researchers and technicians.

Optimization of Unit Commitment and Economic Dispatch in Microgrids Based on Genetic Algorithm and Mixed Integer Linear Programming

Optimization of Unit Commitment and Economic Dispatch in Microgrids Based on Genetic Algorithm and Mixed Integer Linear Programming Book
Author : Mohsen Shiralizadeh Nemati
Publisher : kassel university press GmbH
Release : 2018-04-16
ISBN : 3737604649
Language : En, Es, Fr & De

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Book Description :

Energy Management System (EMS) applications of modern power networks like microgrids have to respond to a number of stringent challenges due to current energy revolution. Optimal resource dispatch tasks must be handled with specific regard to the addition of new resource types and the adoption of novel modeling considerations. In addition, due to the comprehensive changes concerning the multi cell grid structure, new policies should be fulfilled via microgrids’ EMS. At the same time achieving a variety of conflicting goals in different microgrids requires a universal and a multi criteria optimization tool. In this work two dispatch-optimizers based on genetic algorithm and mixed integer linear programming for a centralized EMS are introduced which can schedule the unit commitment and economic dispatch of microgrid units. In the proposed methods, different network restrictions like voltages and equipment loadings and unit constraints have been considered.

Modeling Control and Stability Analysis of an Islanded Microgrid

Modeling  Control  and Stability Analysis of an Islanded Microgrid Book
Author : Aboutaleb Haddadi
Publisher : Unknown
Release : 2015
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

"Economic, technical, and environmental incentives are deriving the energy sector towards a new era of smart distribution networks where coordinated clusters of Distributed Energy Resources (DERs) and local loads form a microgrid, which has a significant potential to serve as the building block of the next generation power distribution networks. This thesis focuses on modeling, control, and stability analysis of a microgrid which consists of multiple electronically interfaced DER units. An important feature of a microgrid is its capability to disconnect from the host power grid and operate in the islanded mode. In the islanded mode of operation, undesirable dynamic interactions could occur between loads and electronically interfaced DER units due to lack of rotational inertia; in the absence of appropriate controls, these dynamic interactions may result in poor transient performance or even instability of an islanded microgrid. To address these challenges, this thesis proposes a control strategy to enhance transient performance and stability of a droop-controlled microgrid and to enable it to ride through transients caused by such system disturbances as load change, DER unit switching, and change of network topology. The dependency of dynamics on the droop gains, steady-state power flow, and network/load is studied in a droop-controlled DER unit. These dependencies result in poor transient performance or even instability of the network in the event of a disturbance in the system. To eliminate these dependencies, a gain-scheduled decoupling control strategy is proposed which alters the dynamic coupling between the DER unit and the rest of microgrid for better stability and transient performance. The impact of the proposed control on the DER and network dynamics is studied by calculating the eigenvalues of a test microgrid assuming the proposed control. The proposed control is shown to stabilize the microgrid for a range of operating condition. Further, this thesis develops a stability analysis method to study dynamic interaction of loads with a DER units and its impact on small-signal stability of an islanded microgrid. The purpose of this study is to design controls that are insensitive to load dynamics. The proposed stability analysis method: i) is a frequency-domain approach which models the source-load dynamic interaction via a closed-loop system of impedances and admittances; ii) provides a less conservative stability condition compared to existing methods, in the sense of having less restriction on the control system; and iii) establishes a robust stability margin in terms of perturbations in load parameters. The proposed method is used to examine small-signal stability of a test islanded microgrid. The findings of the frequency domain analysis are illustrated through time-domain simulations around the operating point on the system under study. Next, based on the proposed stability analysis method, a controller design methodology has been proposed for a DER unit to design a controller which enhances robust stability against load dynamics.Extensive case studies, based on time-domain simulations in the PSCAD/EMTDC software environment, are conducted to evaluate performance of the proposed controllers when the microgrid is subject to various disturbances such as load change, change in network topology, and DER unit outage. Real-time case studies, using OPAL-RT, are also conducted to demonstrate feasibility of hardware implementation and validate controller performance against real-world implementation issues." --

Modeling techniques and control strategies for inverter dominated microgrids

Modeling techniques and control strategies for inverter dominated microgrids Book
Author : Gkountaras, Aris
Publisher : Universitätsverlag der TU Berlin
Release : 2017-02-15
ISBN : 3798328722
Language : En, Es, Fr & De

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Book Description :

The character of modern power systems is changing rapidly and inverters are taking over a considerable part of the energy generation. A future purely inverter-based grid could be a viable solution, if its technical feasibility can be first validated. The focus of this work lies on inverter dominated microgrids, which are also mentioned as 'hybrid' in several instances throughout the thesis. Hybrid, as far as the energy input of each generator is concerned. Conventional fossil fuel based generators are connected in parallel to renewable energy sources as well as battery systems. The main contributions of this work comprise of: The analysis of detailed models and control structures of grid inverters, synchronous generators and battery packs and the utilization of these models to formulate control strategies for distributed generators. The developed strategies accomplish objectives in a wide time scale, from maintaining stability during faults and synchronization transients as well as optimizing load flow through communication-free distributed control. Die Struktur der modernen Energieversorgung hat sich in den letzten Jahrzehnten massiv geändert. Dezentrale Generatoren, die auf Wechselrichtern basieren, übernehmen einen großen Teil der Energieerzeugung. Ein ausschließlich wechselrichterbasiertes Netz wäre ein realistischer Ansatz, wenn seine technische Machbarkeit verifiziert werden könnte. Die wichtigste Beiträge dieser Arbeit sind: Die Analyse von Modellen und Regelstrukturen von Netzwechselrichtern, Synchrongeneratoren und Batterieanlagen. Die entwickelten Modelle werden verwendet, um Regelstrategien für dezentrale Generatoren in Mittelspannungsinselnetzen zu formulieren. Die erste Strategie ist eine Synchronisationsmethode für netzbildende Wechselrichter. Zweitens wird die Leistungsaufteilung in Mittelspannungsinselnetzen mittels Droop Regelung analysiert. Weiterhin erfolgt die Untersuchung der transienten Lastaufteilung zwischen netzbildenden Einheiten mit unterschiedlichen Zeitkonstanten. Beim Betrieb mehrerer paralleler Wechselrichter wird der Einfluss der Netzimpedanz auf die transiente Lastaufteilung analysiert. Die dritte entworfene Regelstrategie umfasst die Integration der Sekundärregelung in die Primärregelung. Der Ladezustand von Batterien wird mit der Lastaufteilung gekoppelt, um die Autonomie des Netzes zu stärken. Abschließend wird eine Kurzschlussstrategie für netzbildende und netzspeisende Wechselrichter entwickelt. Ziel der Strategie ist die Maximierung des Kurzschlussstromes. Als zusätzliche Randbedingung soll keine Kommunikation zwischen Generatoren stattfinden.

Networked Microgrids

Networked Microgrids Book
Author : Peng Zhang
Publisher : Cambridge University Press
Release : 2021-04-30
ISBN : 1108497659
Language : En, Es, Fr & De

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Book Description :

Discover scalable, dependable, intelligent solutions for integrating complex networked microgrids with this definitive guide. Combining resilient control, fast programmable networking, reachability analysis, and cyber-physical security, this is essential reading for researchers, professional engineers, and graduate students.

Design Control and Operation of Microgrids in Smart Grids

Design  Control  and Operation of Microgrids in Smart Grids Book
Author : Mehdi Rahmani-Andebili
Publisher : Springer Nature
Release : 2021-10-22
ISBN : 3030646319
Language : En, Es, Fr & De

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Book Description :

Download Design Control and Operation of Microgrids in Smart Grids book written by Mehdi Rahmani-Andebili, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Modeling Operation and Analysis of DC Grids

Modeling  Operation  and Analysis of DC Grids Book
Author : Alejandro Garces
Publisher : Academic Press
Release : 2021-07-15
ISBN : 012822102X
Language : En, Es, Fr & De

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Book Description :

Modeling, Operation, and Analysis of DC Grids presents a unified vision of direct current grids with their core analysis techniques, uniting power electronics, power systems, and multiple scales of applications. Part one presents high power applications such as HVDC transmission for wind energy, faults and protections in HVDC lines, stability analysis and inertia emulation. The second part addresses current applications in low voltage such as microgrids, power trains and aircraft applications. All chapters are self-contained with numerical and experimental analysis. Provides a unified, coherent presentation of DC grid analysis based on modern research in power systems, power electronics, microgrids and MT-HVDC transmission Covers multiple scales of applications in one location, addressing DC grids in electric vehicles, microgrids, DC distribution, multi-terminal HVDC transmission and supergrids Supported by a unified set of MATLAB and Simulink test systems designed for application scenarios

Microgrids

Microgrids Book
Author : Amjad Anvari-Moghaddam,Hamdi Abdi,Behnam Mohammadi-Ivatloo,Nikos Hatziargyriou
Publisher : Springer Nature
Release : 2021-04-16
ISBN : 3030597504
Language : En, Es, Fr & De

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Book Description :

This book provides a comprehensive overview on the latest developments in the control, operation, and protection of microgrids. It provides readers with a solid approach to analyzing and understanding the salient features of modern control and operation management techniques applied to these systems, and presents practical methods with examples and case studies from actual and modeled microgrids. The book also discusses emerging concepts, key drivers and new players in microgrids, and local energy markets while addressing various aspects from day-ahead scheduling to real-time testing of microgrids. The book will be a valuable resource for researchers who are focused on control concepts, AC, DC, and AC/DC microgrids, as well as those working in the related areas of energy engineering, operations research and its applications to energy systems. Presents modern operation, control and protection techniques with applications to real world and emulated microgrids; Discusses emerging concepts, key drivers and new players in microgrids and local energy markets; Addresses various aspects from day-ahead scheduling to real-time testing of microgrids.

Microgrids

Microgrids Book
Author : Mònica Aragüés-Peñalba,Andreas Sumper
Publisher : MDPI
Release : 2020-01-07
ISBN : 3039218689
Language : En, Es, Fr & De

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Book Description :

Electrical power systems are evolving at the generation, transmission, and distribution levels. At distribution level, small generating and storage units—the so-called distributed energy sources (DERs)—are being installed close to consumption sites. The expansion of DERs is empowering renewable energy source integration and, as a consequence, new actors are appearing in electrical systems. Among them, the prosumer is a game-changer; the fruit of the behavior transformation of the consumer who has not only the ability to consume power but also to produce it. Microgrids can be understood as DER installations that have the capability of both grid-connected and grid-isolated operation. During the last decades, there has been a significant deployment of microgrids (e.g., in countries like the United States, Switzerland, and Denmark) and a consequent increase in renewable energy generation. This is contributing to the decarbonization of electrical power systems. However, the variability and intermittency of renewable sources introduce uncertainty, which implies a more complex operation and control. Taking into account that existing and future planned microgrids are being/going to be interconnected to the current electrical network, challenges in terms of design, operation, and control at power system level need to be addressed, considering existing regulations.

Development and Integration of Microgrids

Development and Integration of Microgrids Book
Author : Wenping Cao,Jin Yang
Publisher : BoD – Books on Demand
Release : 2017-08-16
ISBN : 9535133993
Language : En, Es, Fr & De

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Book Description :

The utilization of AC or DC microgrids across the world has increased dramatically over the years and has led to development opportunities as well as technical challenges when they are connected to the main grids or used as stand-alone systems. This book overviews the development of AC/DC microgrids; explains the microgrid concepts, design and control considerations, discusses operational and technical issues, as well as interconnection and integration of these systems. This book is served as a reference for a general audience of researchers, academics, PhD students and practitioners in the field of power engineering.

Analysis and Mitigation of Frequency Disturbances in an Islanded Microgrid

Analysis and Mitigation of Frequency Disturbances in an Islanded Microgrid Book
Author : Abrez Mondal
Publisher : Unknown
Release : 2017
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The advent of microgrids has shifted the focus from centralized power generation to a more distributed manner, involving a mix of different distributed energy resources (DERs). Reciprocating engine driven synchronous generators (referred as gensets) are a common DER used for distributed generation. One of the key concerns with such power networks is the aspect of frequency regulation under large disturbances, especially in an islanded mode of operation, without the support of the utility grid. This works looks at possible solution methods for mitigating large frequency disturbances in an islanded microgrid. Due to steep load changes, the gensets undergo large frequency swings and can be even vulnerable to stalling. The benefits of smart loads are analyzed in this work to prevent such occurrence by temporarily reducing the transient overload on gensets. Another solution to mitigate large frequency deviation is the integration of energy storage system (ESS), but the effectiveness depends on its operation as a grid-forming or a grid-following unit. Important metrics such as frequency nadir during load changes in the islanded microgrid are computed to show the usefulness of ESS in islanded microgrids. For this purpose, analytical methods using reduced-order models are developed and found to provide accurate estimates of frequency deviations under power system disturbances. Generally, ESS units are interfaced with an inverter and when operated in grid-forming mode can offer desired dynamic frequency behavior in an islanded microgrid. Similarly, other inverter-based DERs can also provide good frequency regulation as they share the larger portion of the transient overload compared to gensets. However, under certain scenarios the inverter-based DERs are found to collapse due to this large transient loading and can bring down the whole microgrid system as a result. A better coordination between the different DERs in a mixed source microgrid is facilitated in this work to guarantee adequate inertial response. Such a scheme redistributes the unequal transient load sharing between gensets and inverter-based DERs and provides improved frequency regulation, without compromising on the survivability of islanded microgrids. The use of smart loads is also incorporated as an additional feature in the overall coordinated scheme for withstanding extreme scenarios.

A Framework for Microgrid Analysis Using OpenDSS

A Framework for Microgrid Analysis Using OpenDSS Book
Author : Sryang Tera Sarena
Publisher : LAP Lambert Academic Publishing
Release : 2014-02
ISBN : 9783659461101
Language : En, Es, Fr & De

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Book Description :

In recent years, along with the rise of global warming issue, researches of renewable energy usage for producing electricity are sprung up. The penetration of renewable energy usage to microgrid brings new challenge as most of the renewable energy are unpredictable. In order to get optimal microgrid operation, integration of methods and softwares are needed in microgrid analysis. This study will use OpenDSS in cooperation with Matlab. Thus optimization algorithm implementation can be achieved by Matlab and simulations of microgrid performed in OpenDSS. The establishment constructs a flexible framework for microgrid analysis which is extensible for various practical studies.

Distributed Control Methods and Cyber Security Issues in Microgrids

Distributed Control Methods and Cyber Security Issues in Microgrids Book
Author : Wenchao Meng,Xiaoyu Wang,Shichao Liu
Publisher : Academic Press
Release : 2020-03-20
ISBN : 012816946X
Language : En, Es, Fr & De

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Book Description :

Distributed Control and Cyber Security Issues in Microgrids presents a thorough treatment of distributed control methods and cyber security issues for power system researchers and engineers. With the help of mathematical tools, this reference gives a deep understanding of microgrids and new research directions, addressing emerging concepts, methodologies and applications of monitoring, control and protection in smart microgrids with large-scale renewables. With the integration of more distributed or aggregated renewables and the wide utilization of power electronic devices, the smart microgrid is facing new stability and security challenges.

Hybrid Renewable Energy Systems in Microgrids

Hybrid Renewable Energy Systems in Microgrids Book
Author : Hina Fathima,Prabaharan N,Palanisamy K,Akhtar Kalam,Saad Mekhilef,Jackson J. Justo
Publisher : Woodhead Publishing
Release : 2018-06-02
ISBN : 0081024940
Language : En, Es, Fr & De

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Book Description :

Hybrid-Renewable Energy Systems in Microgrids: Integration, Developments and Control presents the most up-to-date research and developments on hybrid-renewable energy systems (HRES) in a single, comprehensive resource. With an enriched collection of topics pertaining to the control and management of hybrid renewable systems, this book presents recent innovations that are molding the future of power systems and their developing infrastructure. Topics of note include distinct integration solutions and control techniques being implemented into HRES that are illustrated through the analysis of various global case studies. With a focus on devices and methods to integrate different renewables, this book provides those researching and working in renewable energy solutions and power electronics with a firm understanding of the technologies available, converter and multi-level inverter considerations, and control and operation strategies. Includes significant case studies of control techniques and integration solutions which provide a deeper level of understanding and knowledge Combines existing research into a single informative resource on micro grids with HRES integration and control Includes architectural considerations and various control strategies for the operation of hybrid systems

Distributed Energy Resources in Microgrids

Distributed Energy Resources in Microgrids Book
Author : Rajeev Kumar Chauhan,Kalpana Chauhan
Publisher : Academic Press
Release : 2019-08-17
ISBN : 0128177756
Language : En, Es, Fr & De

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Book Description :

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

Handbook of Distributed Generation

Handbook of Distributed Generation Book
Author : Ramesh Bansal
Publisher : Springer
Release : 2017-03-07
ISBN : 3319513435
Language : En, Es, Fr & De

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Book Description :

This book features extensive coverage of all Distributed Energy Generation technologies, highlighting the technical, environmental and economic aspects of distributed resource integration, such as line loss reduction, protection, control, storage, power electronics, reliability improvement, and voltage profile optimization. It explains how electric power system planners, developers, operators, designers, regulators and policy makers can derive many benefits with increased penetration of distributed generation units into smart distribution networks. It further demonstrates how to best realize these benefits via skillful integration of distributed energy sources, based upon an understanding of the characteristics of loads and network configuration.

Modeling and Control of Power Electronic Converters for Microgrid Applications

Modeling and Control of Power Electronic Converters for Microgrid Applications Book
Author : Yang Han
Publisher : Springer Nature
Release : 2021-08-27
ISBN : 3030745139
Language : En, Es, Fr & De

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Book Description :

This book covers the fundamentals of power electronic converter modeling and control, digital simulation, and experimental studies in the area of renewable energy systems and AC/DC microgrid. Recent advanced control methods for voltage source inverters (VSIs) and the hierarchical controlled islanded microgrid are discussed, including the mathematical modeling, controller synthesis, parameter selection and multi-scale stability analysis, and consensus-based control strategies for the microgrid and microgrid clusters. The book will be an invaluable technical reference for practicing engineers and researchers working in the areas of renewable energy, power electronics, energy internet, and smart grid. It can also be utilized as reference book for undergraduate and postgraduate students in electrical engineering.