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 16 of 16 for “"Fault Protection"”.
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ADAPTIVE GROUND FAULT PROTECTION FOR A DISTRBUTION NETWORK
Due to advances in the field of digital protection, more and more utilities are using microprocessor based relays for protection of power system equipment However, the protection philosophy remains the same. The present practice of protection is to analyze all the abnormal operating conditions in …
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Fault protection in a component-based spacecraft architecture
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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Distributed Electric Aircraft Propulsion Architectures with Fault Protection Strategy
… the isolation of several propulsion motors for a fault in the main busbar. This thesis introduces enhanced fault-tolerant architectures, which are designed to overcome the above issues with traditional radial architecture, without the need of isolating several propulsion motors for a fault in the …
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DC fault protection in HVDC system and the impact on AC frequency response
… are studied in detail.;For HVDC systems, DC protection strategy can significantly impact on the duration of power outage in the event of a DC fault. The current definition of maximum loss-of-infeed for an AC network does not consider the duration of the power outage, and the impacts of DC …
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A secure multi-layer embedded framework for real-time fault detection in Industrial IoT power supply systems
… platform that integrates deterministic protection, embedded diagnostics, and authenticated remote monitoring within a unified architecture. The platform combines real-time hard-fault protection with quantized neural network (QNN)-based soft-fault diagnostics executed on a …
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A flight software development and simulation framework for advanced space systems
… examine automatic code generation and autonomous fault protection within the GRRDE framework. A complex simulation of the TechSat 21 distributed spacebased radar mission highlights the utility of the approach for large-scale applications.
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Intelligent Application of Flexible AC Transmission System Components in an Evolving Power Grid
… power grid, including renewable energy sources, fault protection, and SMART grid technology. The addition of new energy sources has led to the decommissioning of inefficient energy sources. The implementation of new technologies and power load on a large scale, coupled with the removal of grid …
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Condition based monitoring and protection in electrical distribution systems
… may potentially serve as part of the utility protection gear. And they may be called upon to operate in new environments, e.g., non-radial distribution systems as might be found on microgrids or warships. This thesis makes contributions in three areas of condition-based maintenance and …
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Digital Control for Power Factor Correction
… functions such as dynamic temperature control, fault diagnosis and removal, and adaptive control, and will enhance functions such as current sharing and fault protection. The dominance of analog control at the modular level limits system-module communications. Digital control is well recognized …
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An Approach to Fault Management Design for the Proposed Mars Sample Return EDL and Ascent Phase Architectures
… given limited possible operator intervention. Fault protection (FP) encapsulates these autonomous system behaviors, which aim to protect the spacecraft by limiting or detecting and responding to anomalies. In order to provide sufficient coverage to the possible faults a system may encounter, …
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DC-DC converter designs for medium and high voltage direct current systems
DC fault protection is one challenge impeding the development of multi-terminal dc grids. The absence of manufacturing and operational standards has led to many point-to-point HVDC links built at different voltage levels, which creates another challenge. Therefore, the issues of voltage matching …
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Enhanced protection and location techniques for enabling wider implementation of LVDC distribution networks
… to LVDC distribution networks. However, DC fault protection and location have been identified as key technical challenges by a number of research works and industrial groups. This thesis works toward the development of a fast and selective protection scheme and a reliable and accurate fault …
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Design and evaluation of network survivability schemes for correlated multi-failure scenarios
… of solutions here, broadly classified as pre-fault protection and post-fault restoration strategies. The former schemes pro-actively set up backup (redundant) resource pools to overcome anticipated failure events. Meanwhile, the latter strategies are more reactive by design and attempt to …
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Control and operation of HVDC connected offshore windfarm with particular emphasis on faults and black start
… this thesis investigates the different fault characteristics of HVDC connected offshore windfarm systems and proposes several fault rides through control and system recovery schemes.;The first topic discussed in this thesis is the offshore AC fault ride through operation. When modular …
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Power processing and active protection for photovoltaic energy extraction
… adoption of dc systems, the reliability of fault protection and interruption capability is essential. A new dc breaker topology, called the series-connected Z-source circuit breaker, is introduced to minimize the reflected fault current drawn from a source while retaining a common return …
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Modeling and Control Strategy for Capacitor Minimization of Modular Multilevel Converters
The modular multi-level converter (MMC) is the most prominent interface converter used between the HVDC grid and the HVAC grid. One of the important design challenges in MMC is to reduce the capacitor size. In the current practice, a rather large capacitor bank is required to store line-frequency …