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Dissertations / Theses on the topic 'Power System Blackouts'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Panteli, Mathaios. "Impact of ICT reliability and situation awareness on power system blackouts." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/impact-of-ict-reliability-and-situation-awareness-on-power-system-blackouts(e5384a73-232c-4edf-b11c-45e8051298d7).html.

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Recent major electrical disturbances highlight the extent to which modern societies depend on a reliable power infrastructure and the impact of these undesirable events on the economy and society. Numerous blackout models have been developed in the last decades that capture effectively the cascade mechanism leading to a partial or complete blackout. These models usually consider only the state of the electrical part of the system and investigate how failures or limitations in this system affect the probability and severity of a blackout.However, an analysis of the major disturbances that occur

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2

Zhang, Nan. "Advanced fault diagnosis techniques and their role in preventing cascading blackouts." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4897.

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This dissertation studied new transmission line fault diagnosis approaches using new technologies and proposed a scheme to apply those techniques in preventing and mitigating cascading blackouts. The new fault diagnosis approaches are based on two time-domain techniques: neural network based, and synchronized sampling based. For a neural network based fault diagnosis approach, a specially designed fuzzy Adaptive Resonance Theory (ART) neural network algorithm was used. Several ap- plication issues were solved by coordinating multiple neural networks and improving the feature extraction method.

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3

Elizondo, de la Garza David C. "Hidden Failures in Protection Systems and its Impact on Power System Wide-area Disturbances." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31890.

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This document explores Hidden Failures in protection systems, which have been identified as key contributors in the degradation of Power System wide-area disturbances. The Hidden Failure Modes in which the protection systems may fail to operate correctly and their consequences are identified in a theoretical approach. This theoretical side has its practical counterpart since a number of Hidden Failure Modes are found in real wide-area disturbances. The original definition of Hidden Failure, which is a failure that remains undetected and is uncovered by another system event, is included as well

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4

Beeravolu, Nagendrakumar. "Predicting Voltage Abnormality Using Power System Dynamics." ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1722.

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The purpose of this dissertation is to analyze dynamic behavior of a stressed power system and to correlate the dynamic responses to a near future system voltage abnormality. It is postulated that the dynamic response of a stressed power system in a short period of time-in seconds-contains sufficient information that will allow prediction of voltage abnormality in future time-in minutes. The PSSE dynamics simulator is used to study the dynamics of the IEEE 39 Bus equivalent test system. To correlate dynamic behavior to system voltage abnormality, this research utilizes two different pattern re

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5

Bukhsh, Waqquas Ahmed. "Islanding model for preventing wide-area blackouts and the issue of local solutions of the optimal power flow problem." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9671.

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Optimization plays a central role in the control and operation of electricity power networks. In this thesis we focus on two very important optimization problems in power systems. The first is the optimal power flow problem (OPF). This is an old and well-known nonconvex optimization problem in power system. The existence of local solutions of OPF has been a question of interest for decades. Both local and global solution techniques have been put forward to solve OPF problem but without any documented cases of local solutions. We have produced test cases of power networks with local solutions a

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6

Henneaux, Pierre. "A two-level Probabilistic Risk Assessment of cascading failures leading to blackout in transmission power systems." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209433.

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In our society, private and industrial activities increasingly rest on the implicit assumption that electricity is available at any time and at an affordable price. Even if operational data and feedback from the electrical sector is very positive, a residual risk of blackout or undesired load shedding in critical zones remains. The occurrence of such a situation is likely to entail major direct and indirect economical consequences, as observed in recent blackouts. Assessing this residual risk and identifying scenarios likely to lead to these feared situations is crucial to control and optimall

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7

Norris, Sean William. "Preventing wide area blackouts in transmission systems : a new approach for intentional controlled islanding using power flow tracing." Thesis, Durham University, 2014. http://etheses.dur.ac.uk/10713/.

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A novel method to reduce the impact of wide area blackouts in transmission networks is presented. Millions of customers are affected each year due to blackouts. Splitting a transmission system into smaller islands could significantly reduce the effect of these blackouts. Large blackouts are typically a result of cascading faults which propagate throughout a network where Intentional Controlled Islanding (ICI) has the advantage of containing faults to smaller regions and stop them cascading further. Existing methodologies for ICI are typically calculated offline and will form pre-determined isl

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8

Beeravolu, Nagendrakumar. "Pattern Recognition of Power Systems Voltage Stability Using Real Time Simulations." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1279.

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The basic idea deals with detecting the voltage collapse ahead of time to provide the operators a lead time for remedial actions and for possible prevention of blackouts. To detect cases of voltage collapse, we shall create methods using pattern recognition in conjunction with real time simulation of case studies and shall develop heuristic methods for separating voltage stable cases from voltage unstable cases that result in response to system contingencies and faults. Using Real Time Simulator in Entergy-UNO Power & Energy Research Laboratory, we shall simulate several contingencies on IEEE

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9

Krchová, Eva. "Analýza dopadů větrné energie na hospodaření ČEPSu a dopad rozvojových investic firmy ČEPS na českou ekonomiku." Master's thesis, Vysoká škola ekonomická v Praze, 2014. http://www.nusl.cz/ntk/nusl-192966.

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The aim of master thesis is to analyze the impact of electricity generation from wind on investment activities of CEPS's company, and also to assess the impact of these investments on the Czech economy. The work familiarizes readers with reasons for the development of the transmission system in the Czech Republic, with the concept of blackout and also with apparatus of assessing the impact of investment on the economy of the selected state -- input-output model analysis. The method used to obtain data for this work is based on the literature review, as well as expert advice on the input-output

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10

Holmgren, Åke J. "Quantitative vulnerability analysis of electric power networks." Doctoral thesis, KTH, Transporter och samhällsekonomi, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3969.

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Disturbances in the supply of electric power can have serious implications for everyday life as well as for national (homeland) security. A power outage can be initiated by natural disasters, adverse weather, technical failures, human errors, sabotage, terrorism, and acts of war. The vulnerability of a system is described as a sensitivity to threats and hazards, and is measured by P (Q(t) > q), i.e. the probability of at least one disturbance with negative societal consequences Q larger than some critical value q, during a given period of time (0,t]. The aim of the thesis is to present meth

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11

Wasserbauer, Vojtěch. "Obnova napětí v oblasti Prostějova a Zlína." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220176.

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The aim of this thesis is description of critical situations in the electrical grid and the consequences which can be caused by these situations. Further possibilities of voltage recovery and ways how to reach the needed voltage are described. Another part is firstly about regulation electrical system and resources which are connected to this system. Secondly there is appraisal of possibility of connection new resource into distribution system 110 kV and conditions of connection new resources. The result of the thesis is description voltage recovery and the rules which have to be kept during c

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12

Žák, Tomáš. "Návrh schématu zajištěného napájení jaderného bloku pro řešení projektových i nadprojektových havárií." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220178.

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The present Master´s thesis aims at designing an evolutionary scheme of secured power supply at nuclear power plants with VVER 440 reactors during design basis accidents as well as design extension conditions. In the first part of this thesis, concepts relating to the defence in depth of nuclear reactors, operating modes of the blocks as well as types and possibilities of electrical power supply and electric circuits of the block are defined. Although the present thesis deals with PWR 440 in general, special emphasis is put on the Czech NPP in Dukovany, where there are four PWR 440 reactors in

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13

JIN, HONG-ZHAN, and 金鴻展. "Planning an energy management system power laboratory and blackout study." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/34596551035178067269.

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14

Liu, Chi-Hsuan, and 劉奇炫. "Research on the Power Blackout of July 29, 1999 in the Taipower System." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/51600996418691473449.

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碩士<br>國立中正大學<br>電機工程研究所<br>91<br>At 23:31 on July 29, 1999, No.326 tower of Taipower system located at Tainan collapsed. The event results in two 345-KV EHV circuits on that tower, one sea line connecting Chia-Min and Lung-Chyi(south) and another mountain line connecting Jong-Liaw(south) and Lung-Chyi(south), tripped due to ground fault, which then led to successive relay trips resulting in system blackout of the northern and central Taiwan. Almost up to 83% of the total consumers had a power interruption, and this event affected more people and extended over a wider geographic area than any p

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15

Chiu, Tai-Chuan, and 邱泰川. "The study of crisis management improvement in Taiwan power system contingency accidents which triggered off a big blackout." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/13974235375936954216.

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碩士<br>國立中山大學<br>公共事務管理研究所<br>95<br>Due to rising standard of life in Taiwan, power consumption rose dramatically, power systems network are becoming complicated, thus serious impact increasingly. But for many Taipower on-site staffs, lack of blackout related experience and emergency plan. Therefore it is necessary to understand the weaknesses of Taipower systems and the cause and affect of accidental accidents over the years, to develop blackout emergency plan and minimum the loss. In July 29, 1999, Taiwan had occurred unprecedented collapse of the power transmission system in the midnight, ca

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16

STANĚK, Jakub. "Přístup k zajištění informovanosti obyvatelstva v rámci výpadků elektrické energie ve vybraných státech." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-390849.

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Today's globalized world is much more vulnerable than we are often willing to admit. We live in a society which is considerably dependent on a stable supply of electricity. Potential large power outage also called blackout may be a very dangerous situation for our community. Usually we don't realize all consequences there can be for our everyday life, people's health, the security and the economy of the country. Despite the efforts of the responsible authorities, the complications for the population can be very serious. The effects of such unfortunate event can be reduced in a variety of ways.

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17

ŠÍMA, Oldřich. "Zabezpečení nouzového zásobování elektrickou energií u nemocnic v Jihočeském kraji." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-137775.

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This diploma thesis is aimed at assessing the provision of emergency electric power supply to hospitals in South Bohemia. The chapter titled Present State briefly characterises the generation of electric power, the history of power plants in the Czech Republic, the power distribution system, it lists the basic elements of the power distribution system, including its stability and security. Among other things, it presents the term of blackout and its potential impact on the society. Furthermore, this chapter deals with the infrastructure in relation with the critical infrastructure and its hist

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18

Chegu, Ashwini. "High Order Contingency Selection using Particle Swarm Optimization and Tabu Search." 2010. http://trace.tennessee.edu/utk_gradthes/693.

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There is a growing interest in investigating the high order contingency events that may result in large blackouts, which have been a great concern for power grid secure operation. The actual number of high order contingency is too huge for operators and planner to apply a brute-force enumerative analysis. This thesis presents a heuristic searching method based on particle swarm optimization (PSO) and tabu search to select severe high order contingencies. The original PSO algorithm gives an intelligent strategy to search the feasible solution space, but tends to find the best solution only. The

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