Download or read book Modeling Voltage Source Converter Interfaced Equipment for Power System Harmonic Analysis written by Bo Gao and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of voltage source converter (VSC) has been widely accepted in present power systems for interfacing renewable energy generations, high voltage direct current (HVDC) transmission, flexible alternating current transmission systems (FACTS), and other applications. Due to the converter's power electronic composition, there is a need to evaluate VSC's harmonic impacts using tools such as harmonic power flows and frequency scans. For power system planning, there is a significant need for a harmonic model that can represent the harmonic characteristics of VSC equipment. This thesis first clarifies the harmonic characteristics of the VSC-interfaced equipment. The main concern regarding VSC-interfaced equipment is their impact on low-order harmonics because such harmonics are more prevalent in current power systems. The main objective of this thesis is to develop models of VSC-interfaced equipment at low-order harmonics based on the response of VSC-interfaced equipment to such harmonics. This thesis then proposes analytical harmonic models for four types of VSC-interfaced equipment: three-phase VSC, single-phase VSC, doubly-fed induction generator (DFIG), and VSC-HVDC. The results show that all these equipment can be modeled as harmonically coupled impedance matrices. The only exception is the single-phase VSC that has a form of a Thevenin circuit at the 3rd harmonic. Methods to determine the model parameters have been developed for each type of equipment. The validity of the proposed harmonic models and the impacts of various VSC design parameters have been demonstrated using extensive simulation studies and lab experiments. Case studies have demonstrated the effectiveness of the proposed models for harmonic power flow studies.

Download or read book Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods written by Ryan Kuo-Lung Lian and published by John Wiley & Sons. This book was released on 2021-11-01 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods One of the first books to bridge the gap between frequency domain and time-domain methods of steady-state modeling of power electronic converters Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods presents detailed coverage of steady-state modeling of power electronic devices (PEDs). This authoritative resource describes both large-signal and small-signal modeling of power converters and how some of the simple and commonly used numerical methods can be applied for harmonic analysis and modeling of power converter systems. The book covers a variety of power converters including DC-DC converters, diode bridge rectifiers (AC-DC), and voltage source converters (DC-AC). The authors provide in-depth guidance on modeling and simulating power converter systems. Detailed chapters contain relevant theory, practical examples, clear illustrations, sample Python and MATLAB codes, and validation enabling readers to build their own harmonic models for various PEDs and integrate them with existing power flow programs such as OpenDss. This book: Presents comprehensive large-signal and small-signal harmonic modeling of voltage source converters with various topologies Describes how to use accurate steady-state models of PEDs to predict how device harmonics will interact with the rest of the power system Explains the definitions of harmonics, power quality indices, and steady-state analysis of power systems Covers generalized steady-state modeling techniques, and accelerated methods for closed-loop converters Shows how the presented models can be combined with neural networks for power system parameter estimations Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods is an indispensable reference and guide for researchers and graduate students involved in power quality and harmonic analysis, power engineers working in the field of harmonic power flow, developers of power simulation software, and academics and power industry professionals wanting to learn about harmonic modeling on power converters.

Download or read book Harmonic Modeling of Voltage Source Converters Using Time Domain Methods written by Kuo Lung Lian and published by . This book was released on 2007 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voltage source converters (VSCs) are widely used today. At the generation level, VSCs serve as interfaces for distributed energy sources. At the transmission level, VSCs are employed to improve system stability and control power flow. At the distribution level, VSCs are used to improve power quality. Therefore, accurate models of the VSC are essential for system planning. The focus of this dissertation is on steady state models of the VSC for harmonic study. In order to interface a VSC model with existing harmonic power flow programs, the VSC is modeled either as a voltage-dependent harmonic current source or a Norton equivalent harmonic current source. However, due to the nonlinear and time-varying nature of the VSC, iterative techniques need to be employed in the models in order to fully characterize the steady state behavior of the converter. This dissertation presents two types of iteration techniques. The first one is based on the time domain shooting method and Broyden's iterative algorithm to greatly improve the iteration time required for the VSC. The second method is based on a hybrid method in which the VSC is modeled in the time domain while the controller is modeled in the frequency domain. The hybrid method offers an advantage of not enlarging the number of unknown variables as the switching frequency increases.Unlike the existing current injection models, both proposed VSC models can account for (i) the interaction between the power system and the VSC, (ii) the interaction between the ac side and dc side of the converter, (iii) the controllers' impact on the harmonics, (iv) the harmonic interaction between multiple VSCs.

Download or read book Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods written by Ryan Kuo-Lung Lian and published by John Wiley & Sons. This book was released on 2021-11-01 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods One of the first books to bridge the gap between frequency domain and time-domain methods of steady-state modeling of power electronic converters Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods presents detailed coverage of steady-state modeling of power electronic devices (PEDs). This authoritative resource describes both large-signal and small-signal modeling of power converters and how some of the simple and commonly used numerical methods can be applied for harmonic analysis and modeling of power converter systems. The book covers a variety of power converters including DC-DC converters, diode bridge rectifiers (AC-DC), and voltage source converters (DC-AC). The authors provide in-depth guidance on modeling and simulating power converter systems. Detailed chapters contain relevant theory, practical examples, clear illustrations, sample Python and MATLAB codes, and validation enabling readers to build their own harmonic models for various PEDs and integrate them with existing power flow programs such as OpenDss. This book: Presents comprehensive large-signal and small-signal harmonic modeling of voltage source converters with various topologies Describes how to use accurate steady-state models of PEDs to predict how device harmonics will interact with the rest of the power system Explains the definitions of harmonics, power quality indices, and steady-state analysis of power systems Covers generalized steady-state modeling techniques, and accelerated methods for closed-loop converters Shows how the presented models can be combined with neural networks for power system parameter estimations Harmonic Modeling of Voltage Source Converters using Basic Numerical Methods is an indispensable reference and guide for researchers and graduate students involved in power quality and harmonic analysis, power engineers working in the field of harmonic power flow, developers of power simulation software, and academics and power industry professionals wanting to learn about harmonic modeling on power converters.

Download or read book Voltage Sourced Converters in Power Systems written by Amirnaser Yazdani and published by John Wiley & Sons. This book was released on 2010-03-25 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents Fundamentals of Modeling, Analysis, and Control of Electric Power Converters for Power System Applications Electronic (static) power conversion has gained widespread acceptance in power systems applications; electronic power converters are increasingly employed for power conversion and conditioning, compensation, and active filtering. This book presents the fundamentals for analysis and control of a specific class of high-power electronic converters—the three-phase voltage-sourced converter (VSC). Voltage-Sourced Converters in Power Systems provides a necessary and unprecedented link between the principles of operation and the applications of voltage-sourced converters. The book: Describes various functions that the VSC can perform in electric power systems Covers a wide range of applications of the VSC in electric power systems—including wind power conversion systems Adopts a systematic approach to the modeling and control design problems Illustrates the control design procedures and expected performance based on a comprehensive set of examples and digital computer time-domain simulation studies This comprehensive text presents effective techniques for mathematical modeling and control design, and helps readers understand the procedures and analysis steps. Detailed simulation case studies are included to highlight the salient points and verify the designs. Voltage-Sourced Converters in Power Systems is an ideal reference for senior undergraduate and graduate students in power engineering programs, practicing engineers who deal with grid integration and operation of distributed energy resource units, design engineers, and researchers in the area of electric power generation, transmission, distribution, and utilization.

Download or read book Converter Based Dynamics and Control of Modern Power Systems written by Antonello Monti and published by Academic Press. This book was released on 2020-10-22 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Converter-Based Dynamics and Control of Modern Power Systems addresses the ongoing changes and challenges in rotating masses of synchronous generators, which are transforming dynamics of the electrical system. These changes make it more important to consider and understand the role of power electronic systems and their characteristics in shaping the subtleties of the grid and this book fills that knowledge gap. Balancing theory, discussion, diagrams, mathematics, and data, this reference provides the information needed to acquire a thorough overview of resilience issues and frequency definition and estimation in modern power systems. This book offers an overview of classical power system dynamics and identifies ways of establishing future challenges and how they can be considered at a global level to overcome potential problems. The book is designed to prepare future engineers for operating a system that will be driven by electronics and less by electromechanical systems. - Includes theory on the emerging topic of electrical grids based on power electronics - Creates a good bridge between traditional theory and modern theory to support researchers and engineers - Links the two fields of power systems and power electronics in electrical engineering

Download or read book Power System Dynamic Modelling and Analysis in Evolving Networks written by Babak Badrzadeh and published by Springer Nature. This book was released on with total page 893 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power System Quality Assessment written by Jos Arrillaga and published by John Wiley & Sons. This book was released on 2000-04-07 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die Qualitat elektrischen Stroms steht nach wie vor weltweit im Mittelpunkt des Interesses. In Erganzung zu bereits bei Wiley erschienenen Nachschlagewerken wendet sich dieser Band besonders den Phanomenen zu, die die Stromqualitat beeinflussen: EMC (elektromagnetische Kompatibilitat) und Oberschwingungen. Vorgestellt werden effektive Verfahren zur Identifikation der Quellen von Harmonischen und zur Bewertung des Einflusses, den sie auf die Leistungsfahigkeit des Systems ausuben. (12/99)

Download or read book Power Quality in Power Systems and Electrical Machines written by Ewald F. Fuchs and published by Academic Press. This book was released on 2015-07-14 with total page 1138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this must-have reference covers power quality issues in four parts, including new discussions related to renewable energy systems. The first part of the book provides background on causes, effects, standards, and measurements of power quality and harmonics. Once the basics are established the authors move on to harmonic modeling of power systems, including components and apparatus (electric machines). The final part of the book is devoted to power quality mitigation approaches and devices, and the fourth part extends the analysis to power quality solutions for renewable energy systems. Throughout the book worked examples and exercises provide practical applications, and tables, charts, and graphs offer useful data for the modeling and analysis of power quality issues. - Provides theoretical and practical insight into power quality problems of electric machines and systems - 134 practical application (example) problems with solutions - 125 problems at the end of chapters dealing with practical applications - 924 references, mostly journal articles and conference papers, as well as national and international standards and guidelines

Download or read book Pulse Width Modulation for Power Converters written by D. Grahame Holmes and published by John Wiley & Sons. This book was released on 2003-10-03 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: * The first single volume resource for researchers in the field who previously had to depend on separate papers and conference records to attain a working knowledge of the subject. * Brings together the field's diverse approaches into an integrated and comprehensive theory of PWM

Download or read book Modeling and Control of Power Electronics Converter System for Power Quality Improvements written by Sanjeet Kumar Dwivedi and published by Academic Press. This book was released on 2018-08-17 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling and Control of Power Electronics Converter Systems for Power Quality Improvements provides grounded theory for the modeling, analysis and control of different converter topologies that improve the power quality of mains. Intended for researchers and practitioners working in the field, topics include modeling equations and the state of research to improve power quality converters. By presenting control methods for different converter topologies and aspects related to multi-level inverters and specific analysis related to the AC interface of drives, the book helps users by putting a particular emphasis on different control algorithms that enhance knowledge and research work. Present In-depth coverage of modeling and control methods for different converter topology Includes a particular emphasis on different control algorithms to give readers an easier understanding Provides a results and discussion chapter and MATLAB simulation to support worked examples and real-life application scenarios

Download or read book Advanced Technologies for Planning and Operation of Prosumer Energy Systems Volume II written by Bin Zhou and published by Frontiers Media SA. This book was released on 2023-10-18 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Profile of Switched Mode Converter written by Teuvo Suntio and published by John Wiley & Sons. This book was released on 2009-04-13 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collates the information available on this topic, hitherto only to be found in journals and at conferences. It presents the fundamentals and advances in average and small-signal modeling of switched-mode converters, before applying this information to generate a real canonical converter model. Practical examples are scattered throughout the text, and experimental evidence is cited to support theoretical findings. The result is a solid basis for understanding and utilizing the dynamics of switched-mode converters -- for the first time in their 40-year history.

Download or read book Design Control and Harmonic Compensation for Stand Alone and Grid Connected Voltage Source Converters Simulation and Experimental Validations written by Ahmed Ali Nazeri and published by BoD – Books on Demand. This book was released on 2024-01-01 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voltage source converters (VSCs), among other power converters, play a crucial role in supplying power to both local loads and the grid at the PCC. During stand-alone operation, VSCs ensure stable power for loads by regulating the output voltage. In grid-connected mode, the regulation shifts to controlling output current, such as converter side current (CSC) or grid side current (GSC), to inject sinusoidal current into the electrical grid. The nonlinear characteristics of the loads connected to the power converters result in significantly distorted output voltages. This capability is crucial for applications such as uninterruptible power supply (UPS), emphasizing the importance of precise output voltage control. Similarly, in grid-connected mode, the CSC or the GSC is regulated to inject low THD current. The aim is to mitigate grid current harmonics arising from dead time and distorted grid voltages. Therefore, the harmonic mitigation of the grid current control is investigated in this work. This work presents the implementation of the proportional resonant plus multi-resonant (PR-MR) and practical proportional resonant plus multi-resonant (PMR-MR) harmonic controllers in the voltage and current control loops to mitigate the high-order harmonic currents.

Download or read book Modeling Power Electronics and Interfacing Energy Conversion Systems written by M. Godoy Simoes and published by John Wiley & Sons. This book was released on 2016-09-16 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the application of mathematical and engineering tools for modeling, simulation and control oriented for energy systems, power electronics and renewable energy This book builds on the background knowledge of electrical circuits, control of dc/dc converters and inverters, energy conversion and power electronics. The book shows readers how to apply computational methods for multi-domain simulation of energy systems and power electronics engineering problems. Each chapter has a brief introduction on the theoretical background, a description of the problems to be solved, and objectives to be achieved. Block diagrams, electrical circuits, mathematical analysis or computer code are covered. Each chapter concludes with discussions on what should be learned, suggestions for further studies and even some experimental work. Discusses the mathematical formulation of system equations for energy systems and power electronics aiming state-space and circuit oriented simulations Studies the interactions between MATLAB and Simulink models and functions with real-world implementation using microprocessors and microcontrollers Presents numerical integration techniques, transfer-function modeling, harmonic analysis and power quality performance assessment Examines existing software such as, MATLAB/Simulink, Power Systems Toolbox and PSIM to simulate power electronic circuits including the use of renewable energy sources such as wind and solar sources The simulation files are available for readers who register with the Google Group: power-electronics-interfacing-energy-conversion-systems@googlegroups.com. After your registration you will receive information in how to access the simulation files, the Google Group can also be used to communicate with other registered readers of this book.

Download or read book Modeling Analysis and Advanced Control of Voltage and Current source Converters in Renewable Energy based Active Distribution Systems written by Amr A. A. Radwan and published by . This book was released on 2015 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis addresses the integration of renewable energy resources into the grid-connected and isolated distribution systems using voltage- and current-source converters. Motivated by its promising potential and attractive features, a one-stage current-source converter (CSC) is selected as an effective interfacing device for the photovoltaic (PV) generators to the utility-grid. The operation of the grid-connected CSC-based PV system is investigated under different operating conditions, parameters variation, and control topologies. From the dc-side, it is found that the variation in the weather conditions, e.g., solar irradiance levels, might affect the dynamic performance of the vector-controlled grid-connected CSCs. Small-signal dc-side impedance models for the CSC and the PV generators are developed to investigate the system stability. Active compensation techniques are proposed so that the system performance is well maintained under different operating points. From the ac-side, a susceptible potential to instabilities is yielded under the very weak grid conditions. This potential significantly increases in the vector-controlled converters. The implementation of the phase-locked loop (PLL) is found to have a detrimental impact on the system stability as the grid impedance increases. Two solutions for the very weak grid integration have been proposed. Firstly, the power synchronization control (PSC) scheme is developed for CSCs in PV applications so that the PLL is no longer needed, and hence a seamless integration to the very weak grid is achieved. Secondly, supplementary compensation loops are proposed and added to the conventional PLL-based vector-controlled CSC so that the negative impacts of the PLL are completely alleviated. In both cases, small-signal state-space models are developed to investigate the system stability and provide a detailed design approach for the proposed controllers. A larger system level integration is considered in this thesis by interfacing multiple distributed generation (DG) units to the conventional distribution system. A generalized hybrid alternating-current (ac)/direct-current (dc) system that constitutes ac and dc subgrids is created to efficiently accommodate the dc-type renewable sources (such as PVs, batteries, fuel cells, etc.) to the ac-type conventional distribution system. Both subgrids are interconnected using voltage-source converters (VSCs) to facilitate a bidirectional power exchange via multiple inversion-rectification processes. To achieve an accurate and efficient operation, a supervisory power management algorithm is proposed. The algorithm operates successfully regardless of the control mode of the individual DG units. However, the integration of severe dynamic loads, such as direct online inductions motors (IMs) into the ac-side of the hybrid system reflects very lightly damped modes, which in turns induce instabilities, particularly in the isolated mode of operation. Therefore, active compensation techniques have been proposed to increase the system damping. Throughout this thesis, time domain simulations under Matlab/Simulink® environment for the systems under study are presented to validate the analytical results and show the effectiveness of the proposed techniques.

Download or read book Multilevel Converters Analysis Modulation Topologies and Applications written by Gabriele Grandi and published by MDPI. This book was released on 2019-10-14 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of scientific papers concerning multilevel inverters examined from different points of view. Many applications are considered, such as renewable energy interface, power conditioning systems, electric drives, and chargers for electric vehicles. Different topologies have been examined in both new configurations and well-established structures, introducing novel and particular modulation strategies, and examining the effect of modulation techniques on voltage and current harmonics and the total harmonic distortion.