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 31 for “"phasor measurements"”.
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Advanced System Monitoring with Phasor Measurements
Phasor Measurement Units (PMUs) are widely acknowledged as one of the most promising developments in the field of real-time monitoring of power systems. By aligning the time stamps of voltage and current phasor measurements that are consistent with Coordinated Universal Time (UTC), a coherent …
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Three-Phase Linear State Estimation with Phasor Measurements
Given the ability of the Phasor Measurement Unit (PMU) to directly measure the system state and the increasing implementation of PMUs across the electric power industry, a natural expansion of state estimation techniques would be one that employed the exclusive use of PMU data. Dominion Virginia …
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State Estimation and Voltage Security Monitoring Using Synchronized Phasor Measurements
The phasor measurement unit (PMU) is considered to be one of the most important measuring devices in the future of power systems. The distinction comes from its unique ability to provide synchronized phasor measurements of voltages and currents from widely dispersed locations in an electric power …
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The application of phasor measurements for adaptive protection and control
… the collection of the voltage and current phasors during post-fault period, tracking the power swing phenomena, identifying the onset of instability, and then issuing a stabilizing command. In this work, the protection system is to maintain the reliability! ensure the secure operation, and …
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Transient Stability Prediction based on Synchronized Phasor Measurements and Controlled Islanding
… predictions problems. With the advent of Phasor Measurement Units (PMUs) in power systems, it is now possible to monitor the behavior of the system in real time and provide important information for transient stability assessment and enhancement. Techniques such as the rotor oscillation …
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Inter-Area Oscillation Damping with Power System Stabilizers and Synchronized Phasor Measurements
… is an investigation of the use of synchronized phasor measurements as input signals for power system stabilizers installed on the generators of a two-area, 4-machine test power system. A remote measurement feedback controller has been designed and placed in the test power system. Synchronized …
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Real-time phasor measurements for improved monitoring and control of power system stability
This thesis investigates the use of real-time phasor measurements for voltage and transient stability monitoring and control. Taking advantage of the ability of a Phasor Measurement Unit (PMU) placed at a bus to sample at a fast rate the voltage and current phasors of that bus) various schemes for …
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Applications of phasor measurements to the real-time monitoring of a power system
This thesis discusses applications of phasor measurement units to power system monitoring and synchronous generator modeling. Adjustments to a previously developed PMU placement algorithm are described which observe generator and tie line flows explicitly and reduces the number of PMUs required for …
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Application of Wavelet Analysis and Cross-Correlation Techniques to Wide Area Monitoring of Power Systems
<p>The phasor measurement unit (PMU) is a networked, GPS time-synchronized wide-area-monitoring device for modern power transmission systems. The recent and widespread adoption of these devices will provide a wealth of information about the dynamic state of the power system. However, the increasing …
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Robust GPS-based timing for phasor measurement units based on single-receiver and multi-receiver position-information-aided vector tracking
… a major push by the power industry to utilize phasor measurement units (PMUs) for wide area monitoring and control. PMUs are considered to be one of the most critical technologies for the future and modernization of the power grid. This technology produces time-stamped voltage and current …
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The Frequency Monitor Network (FNET) Design and Situation Awareness Algorithm Development
Wide Area Measurements (WAMs) have been widely used in the energy management system (EMS) of power system for monitoring, operation and control. In recent years, the advent of synchronized Phasor Measurements Unit (PMU) has added another dimension to the field of wide-area measurement. However, the …
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An Iterative Technique for Instrument Transformer Calibration and Line Parameter Estimation with Synchrophasor Measurements
The introduction of synchrophasor technology to the realm of power systems has presented a myriad of novel approaches to age-old problems. In this thesis, the questions of instrument transformer calibration and transmission line parameter estimation have been examined. With synchrophasors offering …
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Comparação de dois métodos de detecção da instabilidade de tensão baseados em medição fasorial e equivalente de Thévenin
… Both algorithms have a characteristic of using phasor measurements from PMUs to make their estimates, which are based on the determination of the Thevenin equivalents of the load buses to be analyzed, comparing the values obtained with the impedance values of these ones. Thus, using the Maximum …
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Adaptive power system control
… Feedback to the controller is obtained from phasor measurements at chosen power system buses, generator field voltage measurements, and state estimators. Control effort is aimed at minimizing the oscillations and influencing the power system state trajectory through the control of linear and …
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Synchronized Measurements And Applications During Power System Dynamics
Synchronized phasor measurements during dynamics tend to be affected by prevailing system frequency. Some major blackouts in power systems are indeed featured with very large frequency disturbance. Quantitative study done in this dissertation shows that small frequency disturbance may lead to …
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Adaptive out-of-step relaying with phasor measurement
… through the one year field test. Synchronized phasor measurements were used for the first time for relaying application, proving their ability to detect and analyze system disturbances through the measurement of angle differences between any two points in a system. It is shown that for a system …
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Enhancing Grid Reliability With Phasor Measurement Units
… smart grids". One example is the widely deployed phasor measurement units (PMUs), which enable generating time-synchronized measurements with high sampling frequency, and pave a new path to realize real-time monitoring and control in power grids. However,the massive data generated by PMUs raises …
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Optimal placement of phasor measurement units using the Advanced Matrix Manipulation algorithm
… the problem of the Optimal Placement scheme of Phasor Measurement Units in electrical power systems for State Estimation to facilitate improved monitoring and control of the system parameters. The research work done for this thesis begins with review of Supervisory Control and Data Acquisition …
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Adaptive out of step relay algorithm
… are tripped. EEAC requires synchronized voltage phasor measurements at two specific locations within the overall electrical power system. The two sites are substations located on opposite sides of the electrical center of the two systems. The voltage angle at each location's electric bus will …
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