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 30 for “"exciter"”.
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Power system transient stability analysis of stiff systems using the Multirate method
… in PowerWorld Simulator are established for exciter eigenvalue ranges. Subintervals are applied to exciter models of a 16,386 bus system based on exciter eigenvalues. Application of the Multirate method on exciters provides a time savings for each time step, with the largest being a 10 …
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Transfer matrix analysis of an electrohydraulically driven rotary- vibratory drilling system
… driven with an electrohydraulic inertial mass exciter. The RVD system is a hybrid drilling system consisting of a conventional rotary drilling system assisted by forced harmonic vibrations. The model includes a drill string with continuously distributed inertia, stiffness, internal material, …
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Cyber-Resilient Control of Synchronous Condensers
… condensers (SC). The research establishes robust exciter control algorithms that effectively address nonlinear dynamics and measurement uncertainties present in weak grid environments while simultaneously developing advanced techniques for the detection and localization of false data injection …
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Real-time digital simulation of the generator model
… and its peripheral controllers such as the exciter and the governor-turbine subsystems. In this work, the exciter, the synchronous machine, the machine dynamics and the governor are modeled in detail while a simplified model of the turbine is used. The synchronous machine, the main component …
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Quotient intellectuel et rendement scolaire: population de Sept-Iles : étude des corrélations
… à élucider une question qui prête à controverse, exciter les gens â s'y intéresser davantage et apporter notre contribution à un sujet dont on ne saurait nier l'importance."
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Output Impedance Modeling and Measurement of a 28 kW Synchronous Generator
… model possible, a governor controller and an exciter controller have been designed, and their performance has been evaluated according to the International Standard ISO-8628. A d-q steady-state analysis has been carried out and the resulting small-signal perturbation has been added to the …
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Integration and testing of a digital transceiver for a dual frequency, pulse-doppler radar
… frequency which is used by the existing receiver exciter in the system. After extensive laboratory testing and development, phase coherent waveform generation and multichannel digitization was achieved. A low transmit power version of the active node was constructed and tested at both operating …
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An Evaluation of Laboratory and Test Road Environments and Electric Vehicle Warning Sounds and Systems
… of the factory equipped system and a prototype exciter transducer-based system. All additive sounds and systems were first evaluated for regulatory compliance at stationary, 10 km/h, and 20 km/h conditions and then pedestrian detectability was assessed using 16 blind folded participants and …
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Dynamic testing of loss of field protection
… implemented in General Electric’s EX2000 Digital Exciter. Through the use of EMTP, several different system disturbances are simulated. The EMTP files are then played back with the help of a real-time playback system. The signals from the playback system are then fed to the EX2000 and General …
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Effets de la sous-couche et de la rugosité de surface sur le spectre angulaire de la R.T.A. pour un film d'argent
… configuration de Kretschmann a été utilisée pour exciter les Ondes de Plasma de Surface (O.P.S.). Non seulement l’emplacement et l’élargissement du pic observé dans le spectre de la R.T.A. sont largement influencés par la rugosité de surface, les valeurs de la réflectivité sont aussi grandement …
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Voltage and stability analysis of distribution networks with non-conventional energy sources
… are represented by the two-axis models, the exciters by IEEE Type-1 models and the loads are modelled as constant impedances. To save programming time, it has become common to limit the machine and exciter representations to some specified models. The network admittance matrix is reduced by …
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Synchronous Condensers and Grid-Forming Control for the Integration of Inverter-Based Resources in Weak Grids
… of all IBRs. Second, it develops a robust exciter controller for SCs to maintain terminal voltage stability under large disturbances in weak grids. Third, it proposes a method to identify the most effective subset of IBRs to operate in grid-forming mode, accounting for the dynamic …
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Proximity Coupled Non-Intrusive Wireless Sensors For Monitoring and Diagnostics
… a broadband conformal low-profile surface wave exciter development which can be used to inject a broadband pulse to determine the location of faults using reflectometry principles such as time domain reflectometry, frequency domain reflectometry or joint time frequency domain reflectometry, (3) …
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Control Strategies for Minimizing the DC-Link Capacitance in Power Electronics Converters for Aircraft Electrical Power Systems
… obtained through the excitation control of the exciter SG using a two-quadrant DC chopper. A steady-state feedforward duty ratio and output power-based feedforward exciter field current reference are proposed to improve the transient response of the DC system to meet the military standard …
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Machine Learning-Based Parameter Validation
… The generator model, consisting of an exciter, governor, and its standard parameters have been validated using short circuit faults. Single-error classifiers were first tested, where the accuracies of the classifiers built using positive, negative, and zero sequence measurements were …
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An investigation of turbogenerator dynamics and control
… where the governor loop is first closed and the exciter loop is treated as a SISO system for the prime purpose of rejecting voltage disturbances. The function of the PSS is identified as that of overcoming an awkward switch-back frequency-domain characteristic of the excitation channel so as to …
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Automation tools for the verification and validation of transient stability models
… with the generator, such as the machine model, exciter, governor, and stabilizer, play a significant role in a system's dynamic response. However, in a large system, generator interface signals are affected by many other components of the system. To isolate the response of a generator, a …
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Vibration analysis of a beam structure attached with two dynamic vibration absorbers
… to a force vibration frequency loading using an exciter. The resonance frequencies of interest were 11.23Hz and 35.45Hz. The vibration level that occurred on the beam is measured by comparing the effect of absorber presence to see the reduction in its amplitudes. Based on the experimental and …
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Decentralized Synergetic Control of Power Systems
… supplementary controller that is added to the exciter of the generation unit of the system. Although this method has been previously applied to a Single Infinite Machine Bus (SMIB) system with high degree of success, it has not been employed to systems with multi machine. Also, the method has …
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Fast transfer path analysis using controlled electric motors as in-situ blocked force vibration sources
… a multiple degree of freedom (DoF) blocked force exciter. The concept is to exploit the invariance of the source's blocked force, so that the same blocked force can be assumed to act irrespective of the receiver to which the source is attached. This source excitation has to be characterised on a …
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