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 48 for “"Phasor Measurement Units (PMUs)"”.
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Practical Implementation of a Security-Dependability Adaptive Voting Scheme Using Decision Trees
… this scheme can be implemented with a select few Phasor Measurement Units (PMUs) reporting positive sequence currents to a Phasor Data Concentrator (PDC). At the PDC, the state of the power system is defined as Stressed or Safe and a set of relays either vote or perform normal operation, …
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The optimal placement of phasor measurement units and their effects on state estimation
Phasor measurement units (PMUs) are a key new technology for use in electric power systems as a backbone for sensing and measurement and to improve interface and decision support using instantaneous PMU data which will drive faster simulations and advanced visualisation tools that will help system …
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Inference, estimation, and prediction for stable operation of modern electric power systems
… from IEEE benchmark systems. Newly deployed Phasor Measurement Units (PMUs) are observing the presence of detrimental low frequency forced oscillations (FOs) in transmission grid networks. To begin this thesis, we address the problem of locating the unknown sources of these FOs.
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A Practical Comprehensive Approach to PMU Placement for Full Observability
In recent years, the placement of phasor measurement units (PMUs) in electric transmission systems has gained much attention. Engineers and mathematicians have developed a variety of algorithms to determine the best locations for PMU installation. But often these placement algorithms are not …
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A Method for PMU-Based Reconfigurable Monitoring
… monitored in order to ensure stability. Phasor Measurement Units (PMUs) provide very good observation of a small area of a network, but their relatively high cost prevents them from being deployed at every point. Therefore, to monitor an entire network, State Estimation is still required. …
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Hardware implementation of an automatic adaptive centralized under frequency load shedding
… algorithm using industry grade hardware such as Phasor Measurement Units (PMUs), Synchrophasor Vector Processor (SVP) that resembles real time system operation. The study examines disturbance effects on the frequency at different disturbance locations. Each time the algorithm decisions are able …
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Quickest change detection with applications to line outage detection
… detection problem. QCD algorithms are applied on measurements of voltage phase angles, which are collected using phasor measurement units (PMUs), sampling units that sample at an approximate rate of 30 samples per second and that are placed in the buses of the system. The goal is to detect a line …
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Big data in power systems: a statistical approach on synchrophasor application
Phasor Measurement Units (PMUs) are regarded as one of the most valuable device on the power system. PMUs, being devices that are found on buses of the power system, are capable of supplying both detailed and broad situational information. The data produced by PMUs, which are synchronized by GPS …
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Online Voltage Stability Monitoring and Control Using Limited Synchrophasor Measurements
… of voltage instability. With the application of Phasor Measurement Units (PMUs), dispatchers are able to monitor long term voltage stability in a real time operational environment. This research addresses the critical issues by proposing three different methods. Voltage Stability Assessment Index …
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Telecommunications for a deregulated power industry
… options that are available for utilities today. Phasor measurement units (PMUs) are analyzed in detail and communication delays due to the use of PMUs in wide area measurement systems (WAMS) are also studied. The highlight of this thesis is a close look at the characteristics of the power line …
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Adaptive underfrequency load shedding based on real time simulation
… Recent research discussed utilizing synchrophasor messages to implement adaptive UFLS but these studies have been using virtual PMUs. Of late, hardware implementations for adaptive UFLS scheme using actual Phasor Measurement Units (PMUs) are reported but also these studies are based on small …
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Steady State Testing and Analysis of a Phasor Measurement Unit
Phasor Measurement Units (PMUs) have been instrumental in building a reliable and robust Power System. Recent blackouts have increased the importance of PMUs and PMUs from various manufacturers are being installed in the in large quantities in the North American Grid. The interoperability and …
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Improved dynamic stability using FACTS devices with phasor measurement feedback
… data obtained from another recent advancement, phasor measurement units (PMUs). Based on an overview of the relative capabilities of presently available FACTS devices, a specific device will be chosen to be modeled in a dynamic stability study. Eigenvalue sensitivity analysis will be used to …
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Fast power network detection of topology change locations using PMU measurements
… are calculated using system states obtained from phasor measurement units (PMUs). This scheme can be applied on reduced systems where parts of the network are not covered by PMU measurements. The scheme was tested during different outage events in the IEEE39-bus system. The obtained results …
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Application of PMU for system stability analysis with Thevenin equivalent modeling
… to analyze power system stability by utilizing phasor measurement units (PMUs). In the past decades, industrialization has expanded rapidly around the world, and the demand for stable and reliable power sources has increased. Therefore, maintaining stable operation of the power system is an …
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Implementation of the Security-Dependability Adaptive Voting Scheme
… existing protection technology given Wide Area Measurements (WAMs) provided by Phasor Measurement Units (PMUs). The proposed implementation characteristics allow numerous existing protection practices to be used without changing the basic operation of the practices.
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Distribution system analysis using local-area voltage measurements
… can be realized with the implementation of Phasor Measurement Units (PMUs), which measure the AC voltage and current traveling throughout the grid. However, questions related to both the economic investment and the actionable informational gains are the biggest impediments to the …
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Methodology for a Security-Dependability Adaptive Protection Scheme based on Data Mining
… The proposed methodology is based on Wide Area Measurements (WAMs) obtained with the aid of Phasor Measurement Units (PMUs). A Data Mining algorithm known as Decision Trees is used to classify the power system state and to predict the optimal security/dependability bias of a critical protection …
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Synchrophasor Based Centralized Remote Synchroscope for Power System Restoration
… islands is closed. However, with the advent of phasor measurement units (PMUs) providing time synchronized synchrophasor data, synchroscope functionality can now be implemented at a centralized remote control platform, usually the control room of the specific utility. This thesis presents a …
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Data Trustworthiness in Synchronized Power System Measurements: Algorithms and Methodologies
… reliable, synchronized, and high-quality measurement data. In this context, measurement science plays a pivotal role in ensuring stability, resilience, and efficiency of power system applications. This thesis proposes a set of methodologies, algorithms, and analysis tools aimed at …
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