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Showing 1 to 20 of 21 for “"voltage source converters"”.
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Adaptive Critic-based Control of Voltage Source Converters in Microgrid Systems
… in which the majority of distributed energy resources are interfaced through voltage source converters (VSCs). In dynamic situations, specific structure, natural nonlinearity, and low physical inertia of VSCs may lead to higher sensitivity to network disturbances and power oscillations and in …
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Analysis and Design of Paralleled Three-Phase Voltage Source Converters with Interleaving
Three-phase voltage source converters(VSCs) have become the converter of choice in many ac medium and high power applications due to their many advantages, including low harmonics, high power factor, and high efficiency. Modular VSCs have also been a popular choice as building blocks to achieve …
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Energy Shaping Control for Stabilization of Interconnected Voltage Source Converters in Weakly-Connected AC Microgrid Systems
… ubiquitous installations of renewable energy resources such as solar and wind, for decentralized power applications across the United States, microgrids are being viewed as an avenue for achieving this goal. Various independent system operators and regional transmission operators such as …
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Investigation of Control Concepts for High-Speed Induction Machine Drives and Grid Side Pulse-Width Modulation Voltage Source Converters
Control of a low voltage ac/dc/ac converter for high-speed induction machine drive applications has been investigated. Such a configuration can be applied, for example, in microturbines and high-speed spindles. Scalar control is usually applied for the control of high-speed drives especially in the …
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Local and Central Controllers for Microgrids
… <p>To achieve these objectives, the modeling of voltage source converters and control design in the z-domain are presented. Moreover, the implementation and transient analysis of the power-converter operating modes are executed through MATLAB/SimulinkTM simulations. Then, an energy management …
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High Voltage Direct Current Energy Transmission Using Modular Multilevel Converters
<p>This thesis focus on high voltage direct current (HVdc) energy transmission using modular multilevel converter (MMC) based terminals. It provides a brief comparison between different HVdc technologies, focusing on voltage source converters (HVdc-VSC) with the MMC-based terminal emerging as the …
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Passive Component Weight Reduction for Three Phase Power Converters
… alternative, sustainable, and distributed energy sources, as well as energy storage systems, transportation systems, and the power grid. Three-phase voltage source converters (VSCs) have become the converter of choice in many ac medium- and high-power applications due to their many advantages, …
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Power Sharing and Power Quality Improvement in Parallel Connected Power Converters in the Microgrid
Power electronics-based Voltage Source Converters (VSCs) have been widely used as an interface between energy source and the grid/load in microgrid system. The VSCs are required not only to provide the basic function that achieves reliable and accurate power sharing in a microgrid, but also to …
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Stability Analysis of a High-Power Microgrid
… with multiple parallel-and grid connected voltage source converters using the system parameters from the high-power microgrid testbed at the National Center for Reliable Electric Power Transmission (NCREPT) at the University of Arkansas in order to identify, minimize, if not eliminate, the …
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Development of a System for Testing Grid-connected Doubly Fed Induction Generators with Implementation of a Three-level Neutral-Point-clamped Converter
… transients during synchronisation. Control voltage excitation for the DFIG rotor circuit was achieved by the implementation of two voltage source converters (VSC’s) connected in a back-to-back configuration via a common DC-link. The rotorside converter (RSC) was responsible for regulating …
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Dynamic phasor modelling of VSC FACTS devices for small signal stability studies
… space models and impedance models of some of voltage source converters in flexible ac transmission systems (VSC-FACTS) systems is presented using synchronous dq and dq-dynamic phasor approach.;Two types of the VSC-FACTS devices are studied in this thesis; the static synchronous compensator …
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Analysis in circuit breaker performance requirements for high-voltage DC networks
… in power output. Secondly, many of these sources are located in areas which are difficult or impossible to economically connect to the network using convention ac technology. This is a major issue for offshore wind where distances to shore are increasing, particularly in the North Sea …
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High Performance Power Converter Systems for Nonlinear and Unbalanced Load/Source
… modulation schemes are proposed for four-legged voltage source converters, including inverters and rectifiers. The four-legged power converters with three-dimensional space vector modulation schemes have a better DC link voltage utilization and result in a low distortion. It is an effective …
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Development of the Advanced Emitter Turn-Off (ETO) Thyristor
… and reduces the cost of the high power PWM voltage source converters. With this unique function, the upper and the lower ETO's within a converter phase leg can receive the ideal complementary (without dead-time) PWM signals and solve shoot-through problems. Method to measure the ETO current …
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A Virtual Space Vectors based Model Predictive Control for Three-Level Converters
<p>Three-phase three-level (3-L) voltage source converters (VSC), e.g., neutral-point clamped (NPC) converters, T-type converters, etc., have been deemed to be suitable for a wide range of medium- to high-power applications in microgrids (MGs) and bulk power systems. Compared to their two-level …
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Modeling and Simulation of a Cascaded Three-Level Converter-Based SSSC
… (SSSC) systems utilizing cascaded-multilevel converters (CMCs). Among flexible AC transmission system (FACTS) controllers, the SSSC has shown feasibility in terms of cost-effectiveness in a wide range of problem-solving abilities from transmission to distribution levels. Referring to the …
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Enhanced protection and location techniques for enabling wider implementation of LVDC distribution networks
… of low carbon technologies. Alternative Low Voltage Direct Current(LVDC) distribution networks have been considered as an effective approach to release the pressure on existing LV distribution networks. Meanwhile, the fast development of power electronics and increasing LVDC applications …
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The Modeling and Control of a Cascaded-Multilevel Converter-Based STATCOM
… (STATCOM) systems utilizing cascaded-multilevel converters (CMCs). Among flexible AC transmission system (FACTS) controllers, the STATCOM has shown feasibility in terms of cost-effectiveness in a wide range of problem-solving abilities from transmission to distribution levels. Referring to the …
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Control, Topology and Component Investigations for Power-Dense Modular Multilevel Converters
… electrification, power-electronic converters play the crucial role of transforming electrical energy from one form to another. However, converters today face multiple challenges in meeting ever-growing demands for higher power density, broader operation ranges, and lower costs. The …
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Συμβολή στην ανάλυση της λειτουργίας και σχεδίασης σύγχρονων αγορών ηλεκτρικής ενέργειας με εφαρμογές σε πραγματικό σύστημα
… ένα HVDC σύστημα με Μετατροπείς Πηγής Τάσης (Voltage Source Converters) στο οποίο συνδέεται Αιολικό Πάρκο (μοντελοποιημένο ως πηγή ρεύματος) στην μία πλευρά ενώ στην άλλη πλευρά συνδέεται κατά περίπτωση ασθενές ή ισχυρό ac δίκτυο. Ταυτόχρονα, αναπτύχθηκε μια γενική μέθοδος ανάλυσης που …
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