Global ETD Search
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Showing 1 to 15 of 15 for “"Oscillation Damping"”.
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INTERAREA OSCILLATION DAMPING BY USING A PERMANENT MAGNET SYNCHRONOUS GENERATOR WIND TURBINE
… generator (PMSG) wind turbine control for damping power system inter-area oscillations is a topic of much interest. However, the PMSG wind turbine controls in the generator and grid sides such as a PMSG speed control or dc voltage control do not have a sufficient power modulate to damp the …
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Inter-Area Oscillation Damping with Power System Stabilizers and Synchronized Phasor Measurements
Low frequency oscillations are detrimental to the goals of maximum power transfer and optimal power system security. A contemporary solution to this problem is the addition of power system stabilizers to the automatic voltage regulators on the generators in the power system. The damping provided by …
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Inter-area oscillation damping in large scale power systems with unified power flow controllers
"Power system oscillations occur in power networks as a result of contingencies such as faults or sudden changes in load or generation. They are detrimental to the operation of the system since they affect system stability and the optimal power flow through it. These oscillations do not usually …
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Possible Influences of Vowel Tongue Position on Vocal Fold Stiffness
… [i], [^], and [a]. Those measures were acoustic oscillation damping time, acoustic oscillation threshold pressure, vocal fold oscillation damping time, and vocal fold oscillation threshold pressure. The subject's oral airflow was interrupted with a shutter-valve during vowel productions. …
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Power System Dynamic Control and Performance Improvement Based on Reinforcement Learning
… Voltage Direct Current (HVDC) based inter-area oscillation damping system, Doubly-fed Induction Generator (DFIG) based Fault-Ride-Through (FRT) system, and modified IEEE-39 Bus based frequency regulation system. In the case of the HVDC-based system, the proposed GSES-based power oscillation …
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Power System Frequency Control and Stability Analysis With Increasing Renewable Energy Penetration Level
… generation systems.</p> <p>The power system oscillation damping function initially provided by synchronous generators becomes unavailable with the increasing penetration level of renewable energy. Therefore, it is crucial to enable the oscillation damping capability of a wind or solar farm so …
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Controle de amortecimento de oscilações eletromecânicas utilizando unidades eólicas do tipo DFIG
… in the control of frequency electromechanical oscillations damping, through the installation of an additional control oscillation via POD (Power Oscillation Damping) in the rotor side converter (active power grid or Reactive) of the DFIG wind units. The simulations were performed through the …
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Development of differential evolution based Power System Stabilizer (PSS) with HVDC in small signal stability analysis using MATLAB
Power system (PS) oscillation damping remains as one of the major concerns for secure and reliable operation of large PS network, and is of great presently interest to both industry and academia. This research presents the designing of Differential Evolution (DE) power system stabilizer (PSS) …
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A Wide-Area Perspective on Power System Operation and Dynamics
… algorithm; the development of a power system oscillation damping analysis methodology; the development of several parametric and non-parametric power system disturbance location methods, new methods of power system phenomena visualization, and the proposal and mapping of an online power system …
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Robust decentralized control of power systems through excitation systems and thyristor controlled series capacitors
… applied in Thyristor Controlled Series Capacitor damping control, which is to improve inter-area oscillation damping over a range of operating conditions, for evaluating local signals.;Two case studies are performed to explain and demonstrate the effectiveness of the proposed methodologies. The …
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Laboratory implementation of unified power flow controller hardware-in-loop simulation
… power grid, maintaining voltage stability, and damping oscillations. The rapid development of the power electronics industry has made FACTS devices increasingly attractive for utility deployment due to their flexibility and ability to effectively control power system dynamics. The primary …
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Modeling, control and stability analysis of VSC-HVDC links embedded in a weak multi-machine AC system.
… voltage controllers as well as the supplementary damping controllers for enhancing the small-disturbance rotor-angle stability of a weak multi-machine power system with embedded VSC-HVDC links. Three types of linear current controller schemes (proportional-integral, proportional-resonant and …
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An exploration of prominent cusped-field thruster phenomena : the hollow conical plume and anode current bifurcation
… by a steep jump in anode current and current oscillation amplitude, and, somewhat separately, the coalescence of the ion plume into a hollow cone-like structure with peak fluxes around 30 degrees from the thruster axis. This thesis describes the experimental and numerical work undertaken in an …
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Electromagnetic Transient and Dynamic Modeling and Simulation of a StatCom-SMES Compensator in Power Systems
… the effectiveness of the combined compensator in damping power oscillations. The transient simulation package PSCAD/EMTDC has been used to perform the integrated modeling and simulation studies. A state of the art review of SMES technology was conducted. Its applications in power systems were …
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Damping Effects of Drogue Parachutes on Orion Crew Module Dynamics
… deployed are under-predicting the amount of damping as seen in free-flight tests. The Apollo Legacy Chute Damping model has been resurrected and applied to the Orion system. The legacy model has been applied to predict CM damping under drogue parachutes for both Vertical Spin Tunnel free …