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Dissertations / Theses on the topic 'Ferroresonance'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Ang, Swee Peng. "Ferroresonance simulation studies of transmission systems." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/ferroresonance-simulation-studies-of-transmission-systems(5f596c7f-0d76-4973-a20b-fb42e50e0705).html.

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The onset of a ferroresonance phenomenon in power systems is commonly caused by the reconfiguration of a circuit into the one consisting of capacitances in series and interacting with transformers. The reconfiguration can be due to switching operations of de-energisation or the occurrence of a fault. Sustained ferroresonance without immediate mitigation measures can cause the transformers to stay in a state of saturation leading to excessive flux migrating to transformer tanks via internal accessories. The symptom of such an event can be unwanted humming noises being generated but the real thr

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2

Ali, Zaipatimah. "Development of numerical algorithms for ferroresonance monitoring." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/development-of-numerical-algorithms-for-ferroresonance-monitoring(c65e0f39-bb95-4e0e-abe6-a721f04e80fd).html.

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Ferroresonance is a nonlinear phenomenon that could cause damage in the power systems equipment due to a high voltage and current during its sustained period. If the system is under sustained ferroresonance for a long time, it can cause thermal damage to the equipment. Therefore, it is important to eliminate or mitigate ferroresonance. It is shown that different mode of ferroresonance gives different impact to power systems. Thus, being able to detect and classify ferroresonance according to its mode during the transient period could avoid the system from going into the sustained period by ini

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3

Corea, Araujo Javier Arturo. "Modeling and Analysis of Power Transformers under Ferroresonance Phenomenon." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/312834.

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La Ferroresonancia és un dels fenòmens transitoris més destructius dels sistemes de potència. Associa inductàncies no lineals i capacitancias del sistema, iniciant-se de maneres diferents, el que fa molt difícil la seva caracterització. Per evitar les conseqüències de la ferrorresonancia cal entendre el fenomen, predir-i identificar-lo, per poder evitar-ho o eliminar-lo. No obstant això, el seu comportament complex no permet analitzar usant mètodes lineals. A causa de les no linealitats, la solució d'un circuit ferrorresonante s'obté generalment usant mètodes en el domini del temps; típicament

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4

Jacobson, David. "Field testing, modelling and analysis of ferroresonance in a high voltage power system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0010/NQ53048.pdf.

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5

Mohamed, Jama A. "Existence and stability analysis of ferroresonance using the generalized state-space averaging technique." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/46272.

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Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.<br>Includes bibliographical references (p. [195]-200).<br>Ferroresonance can induce an undesired over-voltage often accompanied with a phase reversal which can damage power distribution transformers and motors and cause injury to the system operators. Similarly, under some conditions, power distribution transformers can excite subharmonic frequencies which in turn can damage the transformer winding and loads connected to the grid lines. While present analysis tools are based on an

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6

Bátora, Branislav. "Analýza ferorezonančního přepětí v elektrických sítích." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-233633.

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This thesis deals with the ferroresonance phenomenon and ferroresonance overvoltage in electric networks. That’s why the introduction part explains the theoretical basis of ferroresonance and its consequences in the power system. The work then focuses on the power system as a non-linear dynamic system and describes various analytical methods for solving these systems. These methods are further applied to diagnose specific systems. There are a number of various power system configurations susceptible to ferroresonance. The most frequent one is theoretically analyzed in this thesis and a number

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7

Benda, Tomáš. "Ferorezonance v elektrických sítích." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217582.

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Diploma thesis deals with ferroresonance phenomena which is present in power networks with saturable inductances and capacitors. A distinction drawn between resonance and ferroresonance will highlight the specific. Lack of knowledge means that it is readily considered responsible for a number of unexplained destructions or malfunctionings of equipment. In the work is a description of such behaviours means risk for electrical power systems. Finally, last part presentat produkt by ABB company intend for damping oscillations and summaries measures on it.

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8

Заболотній, Денис Ігорович. "Методи виявлення ферорезонансних процесів в електричних мережах з великими струмами замикання на землю". Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/31661.

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Магістерська дисертація складається з пояснювальної записки та графічної частини. Пояснювальна записка виконана на 216 сторінках формату А4, в яку входять 87 таблиць та 75 рисунків. Графічна частина містить 8 аркушів технічних креслень формату А1. В магістерській дисертації виконано проект районної електричної мережі напругою 110 кВ та електричної частини підстанції 110/35/10 кВ. Розроблено стартап-проект, розглянуто питання релейного захисту та охорони праці. Досліджено застосування ферорезонансних процесів.<br>The master's dissertation consists of an explanatory note and a graphic part.

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9

Wu, Zhengqiu. "Nonlinear modelling of three phase multi limb transformers." Thesis, London South Bank University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245156.

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10

Gosai, Tejin. "Ferroresonance in an 88kv network." Thesis, 2006. http://hdl.handle.net/10539/189.

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Master of Science in Engineering - Engineering<br>An investigation was conducted on the failures of 88kV line surge arrestors at an Eskom Distribution substation. The surge arrestor failed when one phase of the transmission line was open circuited and all three phases were not isolated by the protection relays. The transformer was lightly loaded and a surge arrestor blocked the neutral path to the ground. The investigation used a modified version of an equivalent circuit proposed by Marti [1]. Transformer magnetising losses, the non-linear resistance of the neutral surge arrestor and the tra

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11

Chang, Yul-lung, and 張右龍. "Research for Potential Transformer Ferroresonance." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/84528259781127322728.

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碩士<br>逢甲大學<br>資訊電機工程碩士在職專班<br>94<br>Ferroresonance is a electrical phenomenon of complex and non- linear resonance, the inductance of PT (Potential Transformer) in the circuit is ferromagnetic, meaning that it has a core made of a ferromagnetic material, usually iron. PT is a type of non-linear inductance, in response to a voltage transient, phase to ground fault, circuit breaker opening, equipment energization or deenergization, lightning induced over voltages, or any number of other sudden changes, the system can take a sudden non-linear jump from its normal steady state response to a steady

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12

Mozaffari, Said. "Chaotic ferroresonance in power transformers." Thesis, 1996. http://hdl.handle.net/2429/6603.

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Ferroresonance can be categorized as a nonlinear resonance which is unpredictable and whose occurrence can cause damage in power distribution and transmission systems. In most instances, ferroresonance occurs when one or two of the source phases are lost while the transformer is unloaded or lightly loaded. This can happen due to the clearing of single phase fusing, the operation of single phase reclosers or the performance of single phase switching procedures. In these cases, if one of the three switches was open, and only two phases of the transformer were energized, there would be a voltage

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13

GAO, MING-LIN, and 高銘林. "Study on ferroresonance effect of potential transformer." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/67140618449030185161.

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14

Juh, Yun Lo, and 羅志雲. "The Ferroresonance Inhibition Method Of Potential Transformer." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/93422153163539666638.

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15

Yang, Jyh-Shiun, and 楊志勳. "The Ferroresonance Phenomenon Simulation of Potential Transformer." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/41758815985361680845.

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16

Guo, Jin-Yu, and 郭晉聿. "The Analysis of Transformer to Ferroresonance with Hysteresis." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/67608151551250180683.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>92<br>It can not always be expected that ferroresonance happens.The ferroresonance is rarely seen on the nonlinear resonance of the power system. If the resonance is transient or steady it may result in overvoltage and over current and also degrade insulation of the equipment. It’s been proved that the rare nonlinear resonance causes some unexplainable damages. Due to increasing power capacity, expanding transmission line and underground line of ferroresonance is increased. This thesis presents the three phase power system with analysis. The magnetic curve was obt

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17

Huang, Chun-wei, and 黃君維. "Applying Wavelet Transform to Ferroresonance Detection and Protection." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80102391167389907260.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>101<br>In power system operation, unstable transient phenomena can cause overvoltage circumstances. Among these transient phenomena, ferroresonance is the most severe one that harms power equipments. The operation and maintenance people usually do not know or ignore it because that is a little bit complicated and hard to predict. This thesis mainly applied wavelet transform to analyze ferroresonance phenomena. The algorithm is developed and based on the high frequency voltage component of wavelet analysis. Furthermore, the threshold energy is further calculated in or

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18

Chen, Ruei-Hao, and 陳瑞豪. "Ferroresonance Analysis of Extra High Voltage Power Plant." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/z92sex.

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碩士<br>國立臺北科技大學<br>電機工程研究所<br>105<br>In this dissertation, through the simulation found that when the power plant maintence, if improper operation, the power plant will have the possible of ferroresonance. FR is due to the non-linear inductance element in the power system into the saturation state and the capacitance resonance. The main reason is the general operation of the transformer are quite close to the saturation zone, so the system have abnormal phenomenon, even the surge or harmonics will possible to make the transformer into the saturation zone. This dissertation use an extra high vol

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19

Lin, Jia-Ching, and 林家慶. "A Study of Ferroresonance in the 161kV Gas Insulated Switchgear." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/4dkwf7.

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碩士<br>國立臺北科技大學<br>電機工程系研究所<br>98<br>Ferroresonance, as a non-linear resonance, is a complex electrical phenomenon caused by the saturation effect of the core components in a transformer or a voltage transformer. If not removed immediately, resonance which occurs as the nonlinear inductance changes to match the circuit capacitance will result in sustained over voltage and over current in a power system. It may further trigger a rise in the temperature and impair insulation, severely damaging equipments and endangering the safety of related personnel. The major purpose of this research is theref

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20

Cheng, Pei-Yu, and 鄭沛昱. "Ferroresonance Analysis, Measurement and Suppression Methodsof 161 kV Electromagnetic Potential Transformer." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/x7s9xu.

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博士<br>國立臺北科技大學<br>電機工程系研究所<br>100<br>This dissertation presents a successful mitigation experience of ferroresonance (FR) with a Damping Reactor(DR) involving electromagnetic type Potential Transformers(PTs) of a 161 kV Gas Insulated Switchgear(GIS) in Taiwan. PTs have a typically low thermal capacity and high accuracy due to their measuring functions. Low core losses are necessary to obtain high accuracy, but they also reduce its damping ability and therefore increase the possibility of FR. FR happened twice and destroyed PTs for just nine months in the study case. Complete FR waveforms of 16

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21

YANG, TIEN-HAO, and 楊天皓. "Investigation of Ferroresonance and Switching Surge Phenomena on the Power Switchyard." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/74688577921301331729.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>96<br>Abstract When the structure of power system is changed or facing external disturbances, many unstable transient phenomena may occur during the transient period. This transient process may lead to overvoltage situation and will have some impacts on the power system. Depending on the frequency of transient process, the transient phenomena can be broadly classified as high, medium and low frequency. The switching and lightning surges belong to a high-frequency overvoltage phenomenon. In contrast, capacitance switching is identified as medium frequency overvoltage

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22

Chang, Chin-Chia, and 張晉嘉. "A Study on Ferroresonance Phenomena for 345kV System of Tainan Science Park." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/57539941468257821792.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>94<br>Ferroresonance is a complicated nonlinear electrical phenomenon which may result in overvoltage, overcurent and thus to degrade insulation of the equipments. It is occurred in power system when system capacitance together with the nonlinear core inductance of power transformers combine to induce resonance. Since the high technology industries have been fast developed and many underground transmission lines have been constructed, the EHV underground cables are used more extensively. In the problems of ferroresonance, the underground cables will be even more s

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23

Su, Ting-I., and 蘇庭儀. "The Research of Ferroresonance and Suppression Solutions on Potential Transformer in Gas Insulated Switchgear." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/b53jt3.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>With the rapid development of science, technology and economic activities, the society has paid more and more attention to the power quality and supply security. Electric power companies increasingly adopt the gas insulated switchgear (GIS). It uses SF6 as insulated materials and contains bus, circuit breakers, disconnect switches, earth switches, current transformers and potential transformers. The design of GIS not only greatly reduces the construction space, but also improves the convenience of maintenance and the safety of operators. In order to effectivel

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24

Cheng, Pei-Yu, and 鄭沛昱. "Analysis of Potential Transformer Ferroresonance and Suppression Methods in the 161kV Gas Insulated Switchgear." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/b6sgeh.

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碩士<br>國立臺北科技大學<br>電資碩士班<br>96<br>Although the first thesis on Ferroresonance（FR） was published in 1920, FR is still not a fully understood phenomenon. This thesis focuses on single phase FR in Gas Insulated Switchgear（GIS）with inductive potential transformers（PT）, fed by the circuit breaker grading capacitance. In principle, FR is a forced oscillation in a non-linear series resonance circuit including a capacitance and non-linear inductance, which shows significantly distorted voltage and current waveforms. The complex non-linear behaviour of the saturable inductance can cause fundamental FR,

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25

Huang, Wan-Ying, and 黃婉瑩. "Switching Surge and Ferroresonance Analyses for 161kV System at Phase-III Development Region of Hsinchu Science Park." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/40866731183837189019.

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26

Chien-HsienHsieh and 謝建賢. "A Study of Ferroresonance Suppression for Potential Transformers with Circuit Breaker Grading Capacitances and Predictive Maintenance for ZnO Arresters." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/698xw4.

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博士<br>國立成功大學<br>電機工程學系<br>103<br>To ensure a safe operation in a complex power network, utility engineers often regulate certain compensation equipment and install protection devices to increase the power system security. However, because of distinctive features of each power equipments, there exists a possibility of risk, hence damaging the power grid. For example, the operation of potential transformer is easy to generate a ferroresonance with capacitive elements or circuit breaker grading capacitance so as to result in overvoltage and overcurrent, bringing in the overheat of transformer coi

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27

WEI, ZHONG-BI, and 魏忠必. "A study on subharmonic ferroresonant phenomena in power system." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/80625472253563571868.

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28

CHEN, XING, and 陳形. "A new approach to the design criteria of ferroresonant voltage regulater." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/63249909774545617132.

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