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 34 for “"Phasor Measurement Unit (PMU)"”.
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Phasor Measurement Unit (PMU) : based system for event detection on synchronous generators
… generator events are sometimes seen in the Phasor Measurement Unit (PMU) data in the Icelandic power system, probably due to the small size. The use of PMU data with event detection algorithms, along with modeling, could be a method of capturing these events for analysis. The goals of this …
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Estimating the parameters of a Thévenin equivalent system based on output voltage and current measurements: computational challenges and simulated studies
… large-scale power system network based on local measurements. The estimation will use a common mathematical method for an overdetermined system. The motivation is taken from phasor measurement unit (PMU) measurements at specific nodes across a transmission line for monitoring purposes. The ac …
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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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Cooperative congestion control in power grid communication networks
… networks are needed for the delivery of Phasor Measurement Unit (PMU) sensor data with real time guarantees to the control centers for timely decisions. Present day network systems are unable to ensure the real-time needs of the PMU data as they are not designed to support PMU devices. …
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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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The Virginia Tech Calibration System
Phasor measurement unit (PMU) applications on power grid monitoring systems have been implemented since the early ninety's. Large monitoring system network performance relies on the consistent measurements of PMUs across the system. This has become a major challenge for designers since large …
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Techniques for Wide-Area State Estimation in Power Systems
… because of their accurate and readily available measurement capability, the inclusion of phasor measurement unit (PMU) data in the WASE methods is examined. For the purpose of realistically integrating an RTO WASE with current ISOs, the methods are constrained so that they do not require …
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Spoofing GPS receiver clock offset of phasor measurement units
… of a spoofing attack on the GPS receiver of a phasor measurement unit (PMU). We formulate the attack as an optimization problem where the objective is to maximize the difference between the time offset of the PMU's receiver clock before and after the attack. Since the PMU uses this clock offset …
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Two-Stage Fault Location Detection Using PMU Voltage Measurements in Transmission Networks
… [1]. With the development of Wide Area Measurement System (WAMS) and Phasor Measurement Unit (PMU), various fault location algorithms have been proposed. The purpose of this work is to determine, modify and test the most appropriate fault location method which can be implemented with a …
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Intelligent Instability Detection for Islanding Prediction
… in this dissertation is the implementation of phasor measurement unit (PMU) based instability detection for islanding prediction procedures using decision tree and neural network modeling. The islanding in the power system define as a separation of the coherent group of generators from the rest …
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Automation tools for the verification and validation of transient stability models
… the PowerWorld simulations are validated against phasor measurement unit (PMU) data collected during a disturbance. This research focuses on the beginning stages of this effort by creating a graphical user interface (GUI) to automate the formation of validation base cases by mapping generator …
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Available group key management for NASPInet
The North American SynchroPhasor Initiative Network (NASPInet) aims to provide a secure and reliable communication infrastructure for sharing phasor measurement unit (PMU) data among utilities, balancing authorities, reliability coordinators and other pow- er grid entities. Since the data is …
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Power Grid Partitioning and Monitoring Methods for Improving Resilience
… and generation, availability of grid-forming units, and topology constraints such as maintaining network radiality. Microgrids help maintain energy supply to critical loads during grid outages, thereby improving resilience. The second part of the dissertation focuses on wide-area monitoring …
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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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Peak-ratio analysis method for enhancement of LOM protection using M class PMUs
… Wide area monitoring systems, using synchronised phasor measurements, which are beginning to play an increasing role in monitoring and control in transmission networks, may offer opportunities to improve the performance of LOM protection in distribution networks, but may require some form of …
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High Accuracy Real-time GPS Synchronized Frequency Measurement Device for Wide-area Power Grid Monitoring
… The FDR works as a sensor, which performs local measurements and transmits calculations of frequency, voltage magnitude and voltage angle to the remote servers via the Internet. Compared with its commercial counterpart Phasor Measurement Unit (PMU), FDR provides less expensive version for …
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Study of Global Power System Frequency Behavior Based on Simulations and FNET Measurements
… With the aid of global positioning system (GPS), measurements from different locations can be time-synchronized; therefore, a system-wide observation and analysis would be possible. As part of the U.S. nation-wide power frequency monitoring network project (FNET), the first part of the study …
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Development and implementation of an open-box distribution-level phasor measurement unit
Phasor measurement units (PMUs) are considered one of the most important measuring devices in power systems. PMUs are most commonly installed in substations, monitoring three-phase power. They provide synchronized measurements from any location where devices are installed. This synchronization is …
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Transmission grid strength analysis and operation of inverter-based microgrids
… of low-inertia systems that only relies on phasor measurement unit (PMU) data is proposed and implemented to the Panhandle region of the ERCOT system. The proposed metric evaluates the system strength by calculating the sensitivity of the voltage phase angle to the change of active power …
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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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