Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Voltage Source Converter"”.
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Modeling of voltage source converter based HVDC transmission system in EMTP-RV
Voltage Source Converter (VSC) applications include but are not limited to HVDC, Flexible AC Transmission System (FACTS) devices such as STATCOM, SSSC, UPFC and Wind generators and active filters. The VSC based HVDC system is a feasible option for bulk power transmission over long or short …
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Simulation of voltage source converter based shunt active filter in EMTP‐RV
… active filters are adaptable to rapidly changing source impedance and provide the necessary harmonic compensation for varying non-linear loads. This thesis models a Voltage Source Converter (VSC) based shunt active filter (SAF) to filter harmonics due to large non linear loads. SAF compensates the …
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A Power Conditioning System for Superconductive Magnetic Energy Storage based on Multi-Level Voltage Source Converter
… two different topologies of the PCS; the current source converter (CSC) type and the chopper and voltage source converter (VSC) type. In terms of the SMES system efficiency, the chopper-VSC type shows a less volt-ampere requirement of the power device. Therefore, the new PCS system has a …
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Further analysis and application of the multirate method for power system dynamic simulation
… firstly presents beneficial attributes of Voltage Source Converter-based DC (VSC-HVDC) transmission for voltage stability, and then presents further analysis of the multirate method and its application to power system dynamic simulation"--Abstract, page iv.
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Virtual Synchronous Machine based Fuzzy V-F Control for VSC of Battery Storage System for Seamless Performance of Microgrid
… the seamless transition is to maintain the load voltage and frequency as well as constant power delivery during both the modes of operation of microgrid. In this thesis, voltage source converter (VSC) of PV generating unit operates in P-Q control mode in both grid-tied and islanded operation of …
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Energy Management Control for Multimode Microgrid Renewable Integration
… the need for renewable and distributed energy resources. Designing a storage unit system which complements the distributed generation is required for increased efficiency and reducing the burden on the utility grid. The energy storage model used in this thesis is the Li-ion battery which is …
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Study on 6, 12 and 24 pulses D-STATCOM for voltage SAG mitigation
… technical problems occur at distribution system. Voltage sag is one of major problems. In the distribution system, voltage sag can occur in any point at any time. This issue always brought up for discussion by Electrical power committee all around the world. There are many causes of voltage sag …
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Analysis of the Power Conditioning System for a Superconducting Magnetic Energy Storage Unit
… Power Conditioning System (PCS), consisting of a voltage source converter (VSC) and bi-directional two-quadrant DC/DC converter (chopper), was developed at the Center for Power Electronics Systems (CPES) under an ONR funded program. The project was to develop advanced power electronic techniques …
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Control of an H-bridge modular multilevel converter for reliable operation of DC transmission systems
… schemes for an H-bridge modular multilevel converter (MMC) that can be used to enhance the transient response of DC transmission systems. The schemes enable H-bridge MMC cell capacitor voltages to be regulated independent of the DC link voltage in a DC transmission system, and also permit …
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Phase domain modelling and simulation of large-scale power systems with VSC-based FACTS equipment
… power flow controller (UPFC) and the high-voltage direct current (HVDC). These power electronics-based controllers have the voltage source converter as their main constituent. The combined solution of both steady state and dynamic power flow equations pertaining to the VSC-based FACTS …
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Harmonic emissions assessment for common DC and AC electric vehicle charging station architectures
… are examined. For both architectures, two-level Voltage Source Converter (VSC) is used to connect the EV FCS to the grid, and further cascaded DC-DC converters are used for voltage regulation at the charger end. The Unit Template (UTC) and dq-SRF control methods are implemented for switching …
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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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High Power Density and High Efficiency Converter Topologies for Renewable Energy Conversion and EV Applications
<p>This dissertation work presents two novel converter topologies (a three-level ANPC inverter utilizing hybrid Si/SiC switches and an Asymmetric Alternate Arm Converter (AAAC) topology) that are suitable for high efficiency and high-power density energy conversion systems. The operation principle, …
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Modular Approach for Characterizing and Modeling Conducted EMI Emissions in Power Converters
… become more and more important for both power converter designers and customers. This dissertation studies EMI noise emission characterization and modeling in power converters. A modular-terminal-behavioral (MTB) equivalent EMI noise source modeling approach is proposed. This work is the first …
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Design, Implementation and Evaluation of a Microgrid in Island and Grid Connected Modes with a Fuel Cell Power Source
… operate the microgrid in both islanded (VSC with voltage and frequency regulation) and grid connected (VSC with current control for power transfer). The experimental laboratory microgrid was constructed and operated in real-time performing its black start and managed transitions between island and …
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Modeling and Simulation of Parallel D-STATCOMs with Full-Wave Rectifiers
… a large influx of intermittent renewable energy sources have put a considerable stress on the nation’s electrical grid. Conventional power flow control techniques such as capacitor banks and tap-changing transformers are incapable of adequately handling the rapid fluctuations in power supply and …
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Modeling, control and stability analysis of VSC-HVDC links embedded in a weak multi-machine AC system.
… the small-signal dynamic performance of high voltage direct current (HVDC) transmission links based on voltage source converter (VSC) technology operating in parallel with the existing longitudinal Australian power system. This thesis presents the principle design methodology to achieve robust …
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Development of the Advanced Emitter Turn-Off (ETO) Thyristor
… will have a major impact to high power converter designs. A novel integrated method to eliminate the dead-time requirement is proposed for ETO. This method not only improves the output waveform quality but also increases the reliability and reduces the cost of the high power PWM voltage …
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Examination of Power Systems Solutions Considering High Voltage Direct Current Transmission
… integration of nondispatchable, renewable energy sources upsets the current operating regime. A challenge faces engineers - how to expand generation, expand transmission capacity, and integrate renewable energy sources while maintaining maximum system efficiency and reliability. A technology that …
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Μελέτη μετατροπέα πηγής τάσης για διασύνδεση μικροπαραγωγών σε μικροδίκτυα, με δυνατότητα "σύνδεσης και λειτουργίας" και απόσβεση αρμονικών
Η παρούσα διατριβή αφορά τη μελέτη ενός εργαστηριακού μετατροπέα πηγής τάσης για τη διασύνδεση μονάδων παραγωγής σε μικροδίκτυα, τη δυνατότητα της επίτευξης «σύνδεσης και λειτουργίας» και τη βελτίωση της ποιότητας ισχύος μέσω της απαλοιφής ανώτερων αρμονικών. Οι στόχοι της παρούσας διατριβής είναι: …