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.
Results
Showing 1 to 20 of 23 for “"Power System Dynamics"”.
-
A Singular Perturbation Approach to Power System Dynamics
Made available in DSpace on 2014-12-12T20:54:51Z (GMT). No. of bitstreams: 1 7913370.pdf: 4934947 bytes, checksum: 13fd2a2832762cd4a9a99d26198bc0cd (MD5) Previous issue date: 1978
-
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 …
-
Modeling of power system dynamics in the medium time scale
… of electrical machines and interconnected power systems in the medium time scale using integral manifold techniques. First, an improved model for power system stabilizer design that captures the damping due to the amortisseur windings while retaining the simplicity of the DeMello-Concordia …
-
Discovering Power System Dynamics through Time-Frequency Representation of Ambient Data
… energy and its integration into the modern power grid, we face some new issues. Aside from the increased switching rate, which results in faster dynamic behavior, realistic models for these Inverter-Based Resources (IBRs) are not widely available. This complicates researching the behavior of …
-
Laboratory implementation of unified power flow controller hardware-in-loop simulation
… most promising network controllers for the bulk power system is the family of power electronics-based controllers, known as "flexible AC transmission system" (FACTS) devices. FACTS devices work by modifying power flow in individual lines of the power grid, maintaining voltage stability, and …
-
Power system dynamic modeling and synchrophasor measurements
… -- Permission to Use images and information from Power System Dynamics and Stability.pdf: 669432 bytes, checksum: 3459a9d6ce0a0e6cfe8fa31ab417fbc9 (MD5) RE_ EPRI CopyRight Release Request -- FW_ Copyright Release Request #296.pdf: 652170 bytes, checksum: e278110cc58878cd65df1950661184f6 (MD5) …
-
Waveform relaxation methods for the simulation of systems of differential algebraic equations with applications to electric power systems
… as Waveform Relaxation (WR) for simulating large power system dynamics. Past work has shown the feasibility of this method for frequency studies involving the classical model generator and loads modeled as constant impedances. This work has been expanded to include voltage studies where the loads …
-
Modal Analysis Techniques in Wide-Area Frequency Monitoring Systems
… and phasor measurement units has presented the power industry with special opportunities to study power system dynamics. I propose the use of wide-area frequency measurements in identifying system disturbances based on power system post-event modal properties. In this work, power system dynamics …
-
Decentralized frequency control of power systems with deep penetration of wind-based generation
… and uncertain renewable resources into the power grid is calling for more control and regulation of the power system dynamics. In particular, the automatic generation control, which is responsible for maintaining the nominal system frequency and the scheduled real power interchange, needs to …
-
Renewable electric power systems energy yield and performance estimation
… and uncertainty analysis of renewable electric power systems. We propose system performability models that describe system attributes while acknowledging failures and repairs in constituent elements. Two broad classes of models are investigated: i) Markov reliability and reward models, and ii) …
-
Design and Evaluation of a Photovoltaic Inverter with Grid-Tracking and Grid-Forming Controls
… the stabilization of the grid frequency during power system dynamics. The purpose of this thesis is primarily to present the design of a grid-forming control scheme based on the VSM and the derivation of the terminal dq-frame ac impedance of the small-signal model of the inverter and control …
-
Power Systems Frequency Dynamic Monitoring System Design and Applications
Recent large-scale blackouts revealed that power systems around the world are far from the stability and reliability requirement as they suppose to be. The post-event analysis clarifies that one major reason of the interconnection blackout is lack of wide area information. Frequency dynamics is one …
-
Transmission Line Dynamics Modeling For Power Electronics-Enabled Control in the Electric Power Systems
In the analysis and operation of electric power systems, understanding the rates at which dynamic phenomena evolve is critical. Classically, power systems operate on multiple time scales, with slower mechanical dynamics from synchronous machines, faster electromechanical controls and protection, …
-
Frequency Monitoring Network (FNET) Algorithm Improvements and Application Development
… deployable wide-area frequency measurement system with high dynamic accuracy which consists of Frequency Disturbance Recorder (FDR) distributed to more than 100 places around North America and an Information Management System situated at Virginia Tech. Since its first FDR deployment in 2003, …
-
Communication Infrastructure for the Smart Grid: A Co-Simulation Based Study on Techniques to Improve the Power Transmission System Functions with Efficient Data Networks
… digital communication techniques in today's power system. As wide area measurements and control techniques are being developed and deployed for a more resilient power system, the role of communication networks is becoming prominent. Advanced communication infrastructure provides much wider …
-
Assessing Renewable Resource Penetration on Power System Small-Signal Reachability
… thesis proposes a method to assess the impact on power system dynamic performance caused by uncertainty in the system supply side. Operational uncertainty, e.g., demand variability, is not new to power systems. However, with the increased penetration of renewable-based generation, operational …
-
New Methods for Synchrophasor Measurement
… measurement units to help create a reliable power system transmission and distribution infrastructure. Wide-area monitoring systems (WAMSs) utilizing synchrophasor measurements can help with understanding, forecasting, or even controlling the status of power grid stability in real-time. A …
-
Towards Three-Phase Dynamic Analysis of Large Electric Power Systems
… combined transmission and distribution (TandD) systems) using a Three Phase Dynamics Analyzer (hereafter referred to as TPDA). TPDA includes dynamic models for electric machines, their controllers, and a three-phase model of the electric grid, and performs three-phase dynamic simulations without …
-
Power System Disturbance Analysis and Detection Based on Wide-Area Measurements
Wide-area measurement systems (WAMS) enable the monitoring of overall bulk power systems and provide critical information for understanding and responding to power system disturbances and cascading failures. The North American Frequency Monitoring Network (FNET) takes GPS-synchronized wide-area …
-
Techniques for determining hidden properties of large-scale power systems
… augmenting and enhancing the knowledge in power system equivalent modeling, and dynamic mode estimation. Work related to these respective topics is presented herein in two parts -- (i) Network Based Methods, and (ii) Measurement Based Methods. The first part focuses on the problem of …
Page 1 of 2