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Dissertations / Theses on the topic 'Synchrophaseur'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Frazao, Rodrigo José Albuquerque. "PMU based situation awareness for smart distribution grids." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT061/document.

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Une infrastructure robuste de surveillance basée sur des mesures numériques classiques est souvent utilisée pour permettre une gestion efficace du réseau de distribution électrique, néanmoins les mesures de phaseurs synchronisés, également connu comme synchrophaseurs, sont particulièrement efficaces pour améliorer la capacité de gestion et la surveillance de ces réseaux. Le synchrophaseur est un phaseur numériquement calculé à partir des échantillons de données en utilisant une source temporelle absolue pour un horodatage extrêmement précis des mesures effectuées.De ce fait, les applications d
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Vutsinas, Megan. "Contingency analysis using synchrophasor measurements." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1233080600/.

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3

Zhang, Yingchen. "New Methods for Synchrophasor Measurement." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/77297.

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Recent developments in smart grid technology have spawned interest in the use of phasor 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 power system Frequency Monitoring Network (FNET) was first proposed in 2001 and was established in 2004. As a pioneering WAMS, it serves the entire North American power grid through advanced situational awareness technique
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Ritzmann, Deborah. "Synchrophasor-based overhead line impedance monitoring." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/74320/.

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Thermal limits of overhead transmission lines create network constraints that can result in curtailment of renewable energy generation. Thermal limits are conventionally static and based on worst-case, non-cooling ambient weather conditions, leading to under-utilization of overhead lines. Utilization can be increased and network constraints reduced by rating overhead lines dynamically, based on actual conductor temperature. Installation and maintenance of temperature and weather sensors along an overhead line is expensive and laborious. A more cost-effective solution is to derive average condu
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5

Agatep, Allan. "Voltage Stability Analysis Using Simulated Synchrophasor Measurements." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/957.

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An increase in demand for electric power has forced utility transmission systems to continuously operate under stressed conditions, which are close to instability limits. Operating power systems under such conditions along with inadequate reactive power reserves initiates a sequence of voltage instability points and can ultimately lead to a system voltage collapse. Significant research have been focused on time-synchronized measurements of power systems which can be used to frequently determine the state of a power system and can lead to a more robust protection, control and operation performa
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Quint, Ryan David. "Response-Based Synchrophasor Controls for Power Systems." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50576.

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The electric power grid is operated with exceptionally high levels of reliability, yet recent large-scale outages have highlighted areas for improvement in operation, control, and planning of power systems.  Synchrophasor technology may be able to address these concerns, and Phasor Measurement Units (PMUs) are actively being deployed across the Western Interconnection and North America.  Initiatives such as the Western Interconnection Synchrophasor Program (WISP) are making significant investments PMUs with the expectation that wide-area, synchronized, high-resolution measurements will improve
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Jones, Kevin David. "Synchrophasor-Only Dynamic State Estimation & Data Conditioning." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/51548.

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A phasor-only estimator carries with it intrinsic improvements over its SCADA analogue with respect to performance and reliability. However, insuring the quality of the data stream which leaves the linear estimator is crucial to establishing it as the front end of an EMS system and network applications which employ synchrophasor data. This can be accomplished using a two-fold solution: the pre-processing of phasor data before it arrives at the linear estimator and the by developing a synchrophasor-only dynamic state estimator as a mechanism for bad data detection and identification. In order t
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Barik, Tapas Kumar. "Synchrophasor Based Centralized Remote Synchroscope for Power System Restoration." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/82849.

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The process of Synchronization between two buses in a power system plays a vital role, especially during blackstart or bulk power system restoration period. The synchronization process is primarily monitored in the presence of experienced personnel at the substation level, which might not control or even predict the after effects of synchronization as soon as the synchronizing breaker between the two buses respective to the two islands is closed. However, with the advent of phasor measurement units (PMUs) providing time synchronized synchrophasor data, synchroscope functionality can now be imp
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9

Huang, Ruth Christiana. "Designing Anti-Islanding Detection Using the Synchrophasor Vector Processor." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1001.

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ABSTRACT Designing Anti-Islanding Detection Using the Synchrophasor Vector Processor Ruth Huang The need for distributed generation (DG) has become more and more popular because of the adverse effects of fossil fuels and the fear of running out of fossil fuels. By having DG, there are less transmission losses, voltage support, controllability of the system, decreased costs in transmission and distribution, power quality improvement, energy efficiency, and reduced reserve margin. The adverse effects of DG are voltage flicker, harmonics, and islanding. Islanding occurs when the DG continues to e
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10

Retty, Hema. "Load Modeling using Synchrophasor Data for Improved Contingency Analysis." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/78328.

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For decades, researchers have sought to make the North American power system as reliable as possible with many security measures in place to include redundancy. Yet the increasing number of blackouts and failures have highlighted the areas that require improvement. Meeting the increasing demand for energy and the growing complexity of the loads are two of the main challenges faced by the power grid. In order to prepare for contingencies and maintain a secure state, power engineers must perform simulations using steady state and dynamic models of the system. The results from the contingency stu
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11

Almas, Muhammad Shoaib. "Synchrophasor Applications and their Vulnerability to Time Synchronization Impairment." Doctoral thesis, KTH, Elkraftteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217978.

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Recent years have seen the significance of utilizing time-synchronized, high resolution measurements from phasor measurement units (PMUs) to develop and implement wide-area monitoring, protection and control (WAMPAC) systems. WAMPAC systems aim to provide holistic view of the power system and enable detection and control of certain power system phenomena to enhance reliability and integrity of the grid. This thesis focuses on the design, development and experimental validation of WAMPAC applications, and investigates their vulnerability to time synchronization impairment. To this purpose, a st
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12

Laverty, D. M. "Synchrophasor Measurement and Wireless Telecommunications in the Active Distribution Network." Thesis, Queen's University Belfast, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.527827.

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13

Zhu, Ruoxi. "Online Voltage Stability Monitoring and Control Using Limited Synchrophasor Measurements." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/97197.

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As the scale and complexity of an interconnected power grid has increased significantly, power systems can be operated close to the verge 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 (VSAI) is a Thévenin Equivalent (TE) based method considering voltage dynamic mechanisms. To extend the model from one load bus to a critical load center, Optimal P
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Adewole, Adeyemi Charles. "Voltage stability assessment and wide area protection/control using synchrophasor measurements." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2380.

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Thesis (DTech (Electrical Engineering))--Cape Peninsula University of Technology, 2016.<br>Electric power systems are being operated closer to their designed stability limits due to the constraints caused by the continuous increase in system loading, and the lack of new power stations and transmission network infrastructure to support this increase in system loading. This coupled with the practice of long distance bulk power transmission and cascading contingencies, makes system instability and consequently blackouts inevitable. In such scenarios, system instabilities like voltage instability
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Chompoobutrgool, Yuwa. "Aspects of Wide-Area Damping Control Design using Dominant Path Synchrophasor Signals." Doctoral thesis, KTH, Elektriska energisystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164251.

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The presence of inter-area oscillations has long affected stability constraints, and therefore, limited the power transfer capacity of interconnected power systems. Adequate damping of these inter-area oscillations is, thus, necessary to secure system operation and ensure system reliability while increasing power transfers. Power system stabilizers (PSS) are the most common devices used to enhance the damping of such oscillations. Many studies have demonstrated that PSSs using remote signals may perform better than using local signals. The advent of phasor measurement units (PMU) makes remote
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Mthunzi, Everett Mondliwethu. "Performance analysis of a protection scheme based on P-class synchrophasor measurements." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2378.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2016.<br>Power grid and system protection advancement greatly depend on technological advances. Advent technologies like digital microprocessor type protective relays facilitate paradigm shifts, providing inimitable beneficial engineering adaptations. Phasor measuring technology provides one such technological advance. The onset and rapid development of the Phasor Measuring Unit (PMU) provides an excellent platform for phasor-based, power system engineering. Power transmission constitutes a critical section in
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17

Bengtsson, Sebastian. "ESTIMATION OF ELECTROMECHANICAL OSCILLATIONS IN THE NORDIC POWER SYSTEM USING SYNCHROPHASOR MEASUREMENT DATA." Thesis, KTH, Elektriska energisystem, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53701.

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Unstable electromechanical dynamics, or electromechanical modes, may cause large amplitude oscillations that may lead to system break-ups or partial blackouts. Thus, the monitoring and study of these modes are of prominent importance and can be of great help for system operators and planning engineers. In this thesis ambient data analysis has been applied on both simulated and synchronized phasor data from Phasor Measurement Units (PMUs) installed at the distribution network of the Nordic power system at Tampere, Lund and Luleå to estimate frequencies and damping ratios of electromechanical mo
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Dekhane, Kunal Shashikant. "The Virginia Tech Phasor Data Concentrator Analysis & Testing System." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/46332.

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The development of Smart Grid and an increased emphasis on Wide Area Measurement, Automation, Protection and Control (WAMPAC) has lead to the substantial 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 respective power systems, Phasor Data Concentrators (PDCs) play a crucial part in accurately relaying data from the point of measurement to the operators at the
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Peng, Jimmy Chih-Hsien. "Developing ringdown oscillation monitoring techniques using synchrophasor data with applications to New Zealand network." Thesis, University of Auckland, 2012. http://hdl.handle.net/2292/10852.

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This thesis improves the performance of Kalman Filter and Prony Analysis for tracking multiple ringdown oscillations in stressed transmission networks. Prior to the start of this research, there were no detailed comparisons between both methods. Hence, detailed investigations were first conducted to address the merits of each technique. Subsequently, a number of modifications for enhancing the approximation accuracy of each method have been outlined. Developments were primarily conducted using synthetic signals and, assumed the ambient noise of the applied systems is white. As a result
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Tauro, Yvonne Agnes Pearl. "An Iterative Technique for Instrument Transformer Calibration and Line Parameter Estimation with Synchrophasor Measurements." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/77706.

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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 real-time data for analysis, a solution to each individual problem seems feasible. A quandary however arises due to the fact that calibration methods depend on accurate knowledge of line parameters, and estimation of these parameters depend on calibrated measurements. Traditional methods of determini
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Chompoobutrgool, Yuwa. "Concepts for Power System Small Signal Stability Analysis and Feedback Control Design Considering Synchrophasor Measurements." Licentiate thesis, KTH, Elektriska energisystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-103032.

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In the Nordic power network, the existence of poorly damped low-frequency inter-area oscillations (LFIOs) has long affected stability constraints, and thereby, limited power transfer capacity. Adequate damping of inter-area modes is, thus, necessary to secure system operation and ensure system reliability while increasing power transfers. Power system stabilizers (PSS) is a prevalent means to enhance the damping of such modes. With the advent of phasor measurement units (PMUs), it is expected that wide-area damping control (WADC), that is, PSS control using wide-area measurements obtained from
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Zora, Leydi Tatiana. "Thesis PMU Applications Prioritization Based in Wide Area Disturbance Events." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/71829.

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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 and real-time picture of what is happening in the power system. PMUs have been increasingly deployed across transmission power grids worldwide. In the USA this is primarily done by utilities through projects sponsored mainly by SIGS and Smart Grid grants. There are different applications that synchro
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Lowe, Bradley Shayne. "A New Method of Determining the Transmission Line Parameters of an Untransposed Line using Synchrophasor Measurements." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/56607.

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Transmission line parameters play a significant role in a variety of power system applications. The accuracy of these parameters is of paramount importance. Traditional methods of determining transmission line parameters must take a large number of factors into consideration. It is difficult and in most cases impractical to include every possible factor when calculating parameter values. A modern approach to the parameter identification problem is an online method by which the parameter values are calculated using synchronized voltage and current measurements from both ends of a transmission l
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Vance, Katelynn Atkins. "Evaluation of Stability Boundaries in Power Systems." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78322.

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Power systems are extremely non-linear systems which require substantial modeling and control efforts to run continuously. The movement of the power system in parameter and state space is often not well understood, thus making it difficult or impossible to determine whether the system is nearing instability. This dissertation demonstrates several ways in which the power system stability boundary can be calculated. The power system movements evaluated here address the effects of inter-area oscillations on the system which occur in the seconds to minutes time period. The first uses gain schedu
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Retty, Hema A. "Evaluation and Standardizing of Phasor Data Concentrators." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/32064.

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The power grid is interconnected in many ways; so that when disturbances occur in a small region, their effects can be seen across large areas causing major blackouts. In order to isolate the fault, measurements taken at different times throughout the blackout need to be collected and analyzed. With each measurement device having its own time source, time alignment can be a quite tedious and lengthy process. The need for a new time synchronized measurement device has arrived. The Phasor Measurement Units (PMU) is not only GPS time synchronized, but it also takes measurements as voltage and cur
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Li, Meiyan. "Transient Stability Prediction based on Synchronized Phasor Measurements and Controlled Islanding." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/52623.

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Traditional methods for predicting transient stability of power systems such as the direct method, the time domain approach, and the energy function methods do not work well for online transient stability 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 prediction method based on time series have made the prediction of system stability possible for real-time
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Becci, Andrea. "Comparison between fault location methods in distribution grid using PMU measurements." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22602/.

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The introduction of Phasor Measurement Unit (PMU) in distribution network has an important innovation that brings the possibility of having in real time the complete knowledge of the full network with higher accuracy. In the following chapters is analized the possibility to derive the position of a fault along a line using measurements performed by a limited number of PMU connected to strategic nodes. Aim of this thesis is to analize and compare different possible use of PMU for fault location and undestrand which are the problematics that have to be solved for real implementation. Fir
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Farantatos, Evangelos. "A predictive out-of-step protection scheme based on PMU enabled distributed dynamic state estimation." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45863.

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Recent widespread blackouts have indicated the need for more efficient and accurate power system monitoring, control and protection tools. Power system state estimation, which is the major tool that is used nowadays for providing the real-time model of the system, has significant biases resulting mainly from the complexity and geographic spread and separation of an electric power system. Synchrophasor technology is a promising technology that has numerous advantages compared to conventional metering devices. PMUs provide synchronized measurements, where synchronization is achieved via a GPS c
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Junior, Shigueru Nagao. "Unidade eletrônica microprocessada para tratamento de sinais de transformadores de instrumentação ópticos e convencionais para aplicações metrológicas in situ." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-17032017-143745/.

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As elevadas perdas existentes no setor elétrico tem causado preocupação nas empresas de distribuição, aliadas ainda a necessidade crescente de um desenvolvimento econômico sustentável. Neste cenário a calibração periódica dos instrumentos destinados a medição (entre eles os transformadores de instrumentos) tornam-se essenciais e tais procedimentos encontram-se previstos no novo modelo de operação do setor elétrico. Porém, as dificuldades logísticas e operacionais de transporte a laboratórios metrológicos credenciados dificultam a execução de tais serviços. As técnicas e métodos desenvolvidos n
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Aleixo, Renato Ribeiro. "Proposta e implementação de uma Micro-PMU." Universidade Federal de Juiz de Fora (UFJF), 2018. https://repositorio.ufjf.br/jspui/handle/ufjf/6641.

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Vianna, João Tito Almeida. "Métodos determinísticos para detecção e localização por área de faltas monofásicas de alta impedância sustentadas nos circuitos primários de sistemas de distribuição desequilibrados." Universidade Federal de Juiz de Fora (UFJF), 2016. https://repositorio.ufjf.br/jspui/handle/ufjf/4039.

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"Transmission Line Parameter Estimation using Synchrophasor Data." Master's thesis, 2018. http://hdl.handle.net/2286/R.I.51696.

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abstract: Transmission line parameters play an important role in state estimation, dynamic line rating, and fault analysis. Because of this, several methods have been proposed in the literature for line parameter estimation, especially using synchrophasor data. However, success of most prior research has been demonstrated using purely synthetic data. A synthetic dataset does not have the problems encountered with real data, such as invariance of measurements and realistic field noise. Therefore, the algorithms developed using synthetic datasets may not be as effective when used in practice. On
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"Analysis of Synchronization and Accuracy of Synchrophasor Measurements." Doctoral diss., 2012. http://hdl.handle.net/2286/R.I.15780.

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abstract: In electric power systems, phasor measurement units (PMUs) are capable of providing synchronized voltage and current phasor measurements which are superior to conventional measurements collected by the supervisory control and data acquisition (SCADA) system in terms of resolution and accuracy. These measurements are known as synchrophasor measurements. Considerable research work has been done on the applications of PMU measurements based on the as-sumption that a high level of accuracy is obtained in the field. The study in this dissertation is conducted to address the basic issue co
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Zheng, Ce. "Power System Online Stability Assessment using Synchrophasor Data Mining." Thesis, 2013. http://hdl.handle.net/1969.1/149456.

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Traditional power system stability assessment based on full model computation shows its drawbacks in real-time applications where fast variations are present at both demand side and supply side. This work presents the use of data mining techniques, in particular the Decision Trees (DTs), for fast evaluation of power system oscillatory stability and voltage stability from synchrophasor measurements. A regression tree-based approach is proposed to predict the stability margins. Modal analysis and continuation power flow are the tools used to build the knowledge base for off-line DT training. Co
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Kai, Moses An. "Implementation and lessons learned from the Texas Synchrophasor Network." 2012. http://hdl.handle.net/2152/19468.

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For decades, power engineers have used simulations to predict grid stability and voltage phase angles. Only recently have equipment been available to actually measure phase angle at points hundreds of miles away. A few of these systems are presently operating in the US by electric grids including the Electric Reliability Council of Texas (ERCOT) and California Independent System Operator (ISO). However, the systems are in their infancy and are far from being used to improve grid reliability. This thesis describes the only independent synchronized phasor network that exists in the US. Thanks to
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Rangel, Werdene Alexandro. "Synchrophasor events in the Western Electricity Coordinating Council (WECC) grid." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-2725.

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Synchronized phasor measurements, or synchrophasors, allow the measurement of voltage phase angle and frequency, and through the comparison of two or more phasor the stability of the grid can be studied. The acquisition of synchrophasors in possible using Phasor Measurement Units (PMUs) and Global Positioning System Technology (GPS). The purpose of this research is to study synchrophasor events in the Western Electricity Coordinating Council (WECC) grid. Several studies have been made in the Texas grid, and that allows a comparison of events in both grids. During this study, five different t
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KONARA, MUDIYANSELAGE ANUPAMA. "Synchrophasor-based robust power system stabilizer design using eigenstructure assignment." 2015. http://hdl.handle.net/1993/30973.

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Power system stabilizers (PSSs) provide the most economical way to improve damping of electro-mechanical oscillations in electrical power systems. Synchrophasor technology enables the use of remotely measured signals in the PSS allowing for greater flexibility in the design of the PSS. Issues related to the transmission of remote signals should be addressed before implementing such systems in practice. This study investigates two of the data transmission issues: (i) delays, and (ii) data dropout; using a synchrophasor-based PSS designed for a two-area four-generator power system model. A ti
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Berry, Brian. "Evaluation of a rotor angle measurement technique using synchrophasor methods." Thesis, 2016. http://hdl.handle.net/10539/20064.

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All power systems are prone to electromechanical oscillations between generators which can become unstable under certain conditions. This instability can have catastrophic consequences such as plant damage or loss of power supply and it is therefore important to monitor these oscillations and ensure that the risks are mitigated through corrective operational actions or automatic control. Whilst this behaviour can be observed in a generators’ terminal voltage phase and magnitude, the internal rotor angle (load angle) of a synchronous machine is useful for understanding the true severity a
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"Real-Time Power System Topology Monitoring Supported by Synchrophasor Measurements." Doctoral diss., 2015. http://hdl.handle.net/2286/R.I.36018.

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abstract: ABSTRACT This dissertation introduces a real-time topology monitoring scheme for power systems intended to provide enhanced situational awareness during major system disturbances. The topology monitoring scheme requires accurate real-time topology information to be effective. This scheme is supported by advances in transmission line outage detection based on data-mining phasor measurement unit (PMU) measurements. A network flow analysis scheme is proposed to track changes in user defined minimal cut sets within the system. This work introduces a new algorithm used to update a previ
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40

Ren, Jinfeng. "Synchrophasor Measurement Using Substation Intelligent Electronic Devices: Algorithms and Test Methodology." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10388.

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This dissertation studies the performance of synchrophasor measurement obtained using substation Intelligent Electronic Devices (IEDs) and proposes new algorithms and test methodology to improve and verify their performance when used in power system applications. To improve the dynamic performance when exposed to sinusoidal waveform distortions, such as modulation, frequency drift, abrupt change in magnitude, etc, an adaptive approach for accurately estimating phasors while eliminating the effect of various transient disturbances on voltages and currents is proposed. The algorithm pre-analyze
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41

Mohan, Deepak. "Synchrophasor based methods for computing the thevenin equivalent impedance of a transmission network between the University of Texas at Austin and the University of Texas PanAm." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-4056.

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With the increase in complexity of modern electricity grids, the implementation of state-estimators has become a vital aspect of stability and contingency analyses for stable and secure power system operation. Transmission line reactance is an important component in the computation of state-estimators. Two models utilizing real-time synchrophasor data and ERCOT load information are proposed to compute Thevenin equivalent reactance. This thesis presents the results of implementing these methods to estimate the equivalent reactance of a transmission network between The University of Texas at Aus
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Sant, Aprajita. "Screening procedure to identify power system events of the Texas Synchrophasor Network." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-05-5257.

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This work presents a method for screening synchrophasor data to search for power system events of interest. The method employs prony algorithm to perform modal analysis and estimate mode amplitude, frequency, and damping ratio on the data obtained from the Texas Synchrophasor Network. The procedure uses seven different Linear Prediction Model (LPM) orders, plus a 10 second window width that slides in steps of 1 second, to minimize the possibility of overlooking events of interest. Further, the algorithm is extended to include user defined modal characteristics thresholds, window length and ste
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43

Cai, Yaojie. "Development of a synchrophasor based power systems monitoring software with a fault locator application for multi-terminal transmission lines." 2017. http://hdl.handle.net/1993/32044.

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Synchrophasor technology is widely available embedded in modern power grid protection, metering, and recording devices. Utilizing synchrophasor measurements, a novel algorithm is proposed for fault location in multi-terminal transmission lines. In order to implement real-time synchrophasor applications, a software platform called “PhasorEye” was developed in this research. PhasorEye facilitates collecting synchrophasor data stream, visualization of decoded data, and implementation of synchrophasor applications as analysis tools. A laboratory setup involving a RTDS real-time digital simulator a
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Allen, Alicia Jen. "Analysis of transmission system events and behavior using customer-level voltage synchrophasor data." 2013. http://hdl.handle.net/2152/21878.

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The research topics presented in this dissertation focus on validation of customer-level voltage synchrophasor data for transmission system analysis, detection and categorization of power system events as measured by phasor measurement units (PMUs), and identification of the influence of power system conditions (wind power, daily and seasonal load variation) on low-frequency oscillations. Synchrophasor data can provide information across entire power systems but obtaining the data, handling the large dataset and developing tools to extract useful information from it is a challenge. To overcome
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LEE, YU-JU, and 李育儒. "Design of Synchrophasor-Based Fault Location Algorithm for Multi-Terminal Nonhomogeneous Transmission Lines." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/z26j4x.

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博士<br>國立臺灣大學<br>電機工程學研究所<br>107<br>In this dissertation, there are two synchrophasor-based fault location techniques for multi-terminal nonhomogeneous transmission lines and three-terminal nonhomogeneous transmission lines with one off-service line branch proposed. The synchronized voltage and current data sets are provided by intelligent electronic devices (IEDs) or phasor measurement units (PMUs) which are deployed on buses. These two fault location methods are explained briefly as below. For multi-terminal nonhomogeneous transmission lines, the method uses two-terminal fault location techni
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Almiron, Rubens E. "Development of a laboratory synchrophasor network and an application to estimate transmission line parameters in real time." 2013. http://hdl.handle.net/1993/22016.

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The development of an experimental synchrophasors network and application of synchrophasors for real-time transmission line parameter monitoring are presented in this thesis. In the laboratory setup, a power system is simulated in a RTDS real-time digital simulator, and the simulated voltages and currents are input to hardware phasor measurement units (PMUs) through the analog outputs of the simulator. Time synchronizing signals for the PMU devices are supplied from a common GPS clock. The real time data collected from PMUs are sent to a phasor data concentrator (PDC) through Ethernet using th
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47

Kowley, Puja Ajay. "Synchrophasor based method for computing the Thevenin equivalent impedance seen by a concentrated wind farm region." 2010. http://hdl.handle.net/2152/9014.

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Transmission line reactance is an important parameter in carrying out stability studies. The model proposed here utilizes available real time synchrophasor data and information about the generation in the ERCOT grid to determine the Thevenin equivalent reactance of a line. Synchrophasors provide the advantage of synchronized measurements of phase angles which are essential in determining the transmission line reactance. This thesis provides the results of applying this model to estimate the Thevenin equivalent line reactance between McDonald Observatory in West Texas and The University of Texa
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"A Data Analytics Framework for Smart Grids: Spatio-temporal Wind Power Analysis and Synchrophasor Data Mining." Doctoral diss., 2013. http://hdl.handle.net/2286/R.I.18169.

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abstract: Under the framework of intelligent management of power grids by leveraging advanced information, communication and control technologies, a primary objective of this study is to develop novel data mining and data processing schemes for several critical applications that can enhance the reliability of power systems. Specifically, this study is broadly organized into the following two parts: I) spatio-temporal wind power analysis for wind generation forecast and integration, and II) data mining and information fusion of synchrophasor measurements toward secure power grids. Part I is cen
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Liu, Jian-Hong, and 劉建宏. "Applications of Wide-Area Synchrophasor Measurements and Distributed Computation Techniques for Real-Time Voltage Stability Assessment in Smart Power Grids." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/70423332340788312944.

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博士<br>國立清華大學<br>電機工程學系<br>102<br>As the power system becomes more stressed and the penetration of renewable energies increases, voltage stability assessment (VSA) becomes a key issue for monitoring and controlling the security of modern bulk power grids. For security considerations, system operators require powerful tools to analyze voltage security of the bulk power system in real-time environments. Traditionally, the VSA is accomplished based on model-based approaches. Although various analytical approaches have been proposed along this direction, their computational complexities may impede
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