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 13 of 13 for “"Short circuit faults"”.
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Fault detection and location in modular trees
… thesis. The fault set is restricted to stuck-at-faults in the discussion of the fault location problem. Short circuit faults and broken and short circuit faults are considered in the discussion of the fault detection problem. In either the fault detection or location case, detection conditions …
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Power Electronics- based Photovoltaics Panel Fault Detection using Online Impedance Measurement Technique
… with C2000 MCU and helps identify hot spot faults and short circuit faults in a 300 W rooftop PV panel. Multiple PV panel faults scenarios such as hot spot faults, short circuit faults, junction box faults, and capacitor faults are investigated to deduct further the effectiveness of the …
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Synchronous Condensers and Grid-Forming Control for the Integration of Inverter-Based Resources in Weak Grids
… inertia of SGs, and they do not contribute to short-circuit fault currents as much as SGs do. The lack of strength and inertia increases the risk of instability during contingencies, e.g., short-circuit faults. This dissertation investigates and proposes methodologies to enhance the stability …
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Modeling of Power Consumption and Fault Tolerance for Electronic Textiles
… the physical nature of the e-textile and the faults developed can adversely affect the accuracy of results from the e-textile. Open and short circuit faults can disconnect or drain the battery respectively, affecting both battery life and the performance of the e-textile. This thesis describes …
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Machine Learning-Based Parameter Validation
… 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 compared. The negative sequence measurements have consistently produced the …
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Improvement of distribution transformer fault analysis using FRA method
… of FRA is required. In this study, an electrical circuit model is developed based on 33/11kV, 1MVA distribution transformer to investigate the influence of various changes in the winding RLC values on the frequency response. The model is also used to simulate other failures such as winding …
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Distributed Electric Aircraft Propulsion Architectures with Fault Protection Strategy
… associated with effectively limiting short-circuit fault currents due to the low cable impedance. Due to this, the fault current rises sharply, requiring an enhanced protection strategy. To accomplish this, an algorithm is proposed utilizing an I2t and the current limiting-based …
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Development of the Advanced Emitter Turn-Off (ETO) Thyristor
… can effectively protect the ETO during the short circuit faults. In order to improve ETO's turn-off capability, a comprehensive investigation of the turn-off failure mechanism of the ETO was performed. A series of simulations and experiments are carried out to study the ETO turn-off …
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GaN Device Characterization, Converter Optimization and Development for Enhanced Aviation Systems
… 9.8 V overshoot. To prevent the inverter from short-circuit faults, the short-circuit protection based on the measurement of the voltage on the power loop inductor with a low-pass filter is successfully applied with only 115 ns protection time. The designed prototype shows expected thermal …
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Analyzing voltage sag direction using protective relays and deep-learning methods
… systems are designed to detect and isolate faults and other abnormal conditions, preventing them from cascading through the power grid and causing widespread outages. The primary challenge in protection is to detect the fault, the type of fault, and the location of the fault. Traditional …
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Detection of faults in a scaled down doubly-fed induction generator using advanced signal processing techniques.
… provision for implementing stator inter-turn short-circuit faults (ITSCF), rotor ITSCF and static eccentricity (SE) faults in the laboratory environment. The micromachine has been assessed under the healthy and faulty states, both before and after incorporating a converter into the rotor …
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Study of superconducting fault current limiters in power systems
… common causes of failures in power systems are short-circuit faults. Short- circuit currents can grow thousands of times larger than normal system operating currents, i.e., within milliseconds. This places enormous thermal and mechanical stress on existing transmission infrastructure and may …
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Condition Monitoring of VSD-fed Induction Motors
… robustness, induction motors are still prone to faults [9] due several factors such as being subjected to diverse, continuous, and harsh conditions [10], being subjected to frequent start-stop cycles leading to wear and cracking of machine elements, or being subjected to continued motor overload …