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Showing 1 to 20 of 176 for “"phasor"”.
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Resistive Companion Dynamic Phasor Networks and Phasor to Time Domain Network Coupling
… resistive companion form (RCF) is extended to phasor and dynamic phasor models. A phasor solver is implemented in the Virtual Test Bed (VTB) simulation environment. Several models targeting the VTB phasor solver are derived and discussed.</p> <p>Also, a method for coupling phasor RCF networks …
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Theory of phasor-field imaging
Phasor-field (P-field) imaging is a promising recent solution to the task of non-line-of-sight (NLoS) imaging, colloquially referred to as "seeing around corners". It consists of treating the oscillating envelope of amplitude-modulated, spatially-incoherent light as if it were itself an optical …
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Accurate frequency estimation with phasor angles
… order least error square approximation on the phasor angles of the input waveform. Then, a resampling based on the rough frequency estimation is carried out, followed by another second order least error square approximation to obtain the final results. The results of simulations using this …
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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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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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Evaluation and Standardizing of Phasor Data Concentrators
… synchronized measurement device has arrived. The Phasor Measurement Units (PMU) is not only GPS time synchronized, but it also takes measurements as voltage and current phasors. PMUs are becoming an integral part in many power system applications from load flow analysis and state estimation to …
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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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Optimal Substation Coverage for Phasor Measurement Unit Installations
… thus indirectly minimizing the synchrophasor deployment costs. Also presented is a brief history of the PMU and its applications along with the conventional Optimal PMU placement problem and the scope for expanding this work.
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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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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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The Virginia Tech Phasor Data Concentrator Analysis & Testing System
… increase in the development and use of Synchrophasor Systems. The Department of Energy having realized its importance in the Power System has encouraged its deployment through the Smart Grid Investment Grant. With many utilities beginning to implement a large number of PMUs over their …
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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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Synchronized Phasor Measurement Units Applications in Three-phase Power System
Phasor Measurement Units (PMUs) are widely acknowledged as one of the most significant developments in the field of real-time monitoring of power system. By aligning time stamps of voltage and current phasor measurements, which are consistent with Coordinated Universal Time (UTC), a coherent …
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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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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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Development and deployment of a residential voltage level phasor measurement unit
… the production and transmission of synchrophasor data. Synchrophasor data provides near real-time data at widely separated points across the power grid. This data is produced by PMUs, and their ubiquity on the grid is becoming a reality. Commercial PMUs today are proprietary systems which …
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Open-Source Testbed to Evaluate the Cybersecurity of Phasor Measurement Units
The Phasor Measurement Unit provides clear data for ease of grid visibility. A major component of the device is the Global Positioning System (GPS) for time synchronization across the board. However, this device has become more susceptible to cyber-attacks such as spoofing. This paper constructs an …
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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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Phasor Measurement Units Applications Prioritization Based on Wide-Area Disturbance Events
Synchrophasor Measurement Units (PMUs) are devices that can not only measure but also time stamp voltage, current, frequency, among others. PMUs take these synchronized measurements as fast as 60 times per second; compared with the traditional 2-4 second SCADA measurements, PMUs bring a much clear …
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