Dissertations / Theses on the topic 'Compensation neutre'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 19 dissertations / theses for your research on the topic 'Compensation neutre.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Nguefeu, Samuel. "Synthese de bobines de point neutre d'impedance reglable pour la compensation des reseaux electriques moyenne tension." Paris 6, 1993. http://www.theses.fr/1993PA066759.
Full textWelfonder, Till. "Localisation de défauts monophasés dans les réseaux de distribution à neutre compensé." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0053.
Full textThe distribution system neutral point grounding by a compensation coil reduces the fault current due to a single phase fault. Which ÎS the most fréquent fault type in practice. Fhis means improves the supply quality, however, it makes tauli détection and local i diffieuh fhi thesis deals with fault location of low résistive self-extinguishing or permanent earth faults in radial, neutral compensated Systems. Transient fault phenomena are studied and a new fault location approach is developed. The approach is based on the exploitation of a chaiaeterisric résonance frequency of signais measured in the HV/MV ration. An algorithm has been created, developed and tested. It is validated with po system simulations and with measured fault data of real faults. The influence of différent parameters on the algorithm accuracy is examined and explairsed
Welfonder, Till. "Localisation de défauts monophasés dans les réseaux de distribution à neutre compensé." Phd thesis, Grenoble INPG, 1998. http://tel.archives-ouvertes.fr/tel-00824852.
Full textLamouroux, Guillaume. "Les subventions aux entreprises privées : contribution à l'analyse civile et fiscale de l'acte neutre." Electronic Thesis or Diss., Bordeaux, 2021. http://www.theses.fr/2021BORD0018.
Full textWhile the notion of subsidy is widely discussed within public law and financial science, private law remains relatively indifferent to this subject. This is particularly detrimental given that the concept of subsidies for and by private companies can only be imperfectly assessed via the classical analysis of these subjects where a subsidy is viewed as an unconditioned financial support. Studying subsidies to private companies thus enables us to assess the appropriateness of this classical analysis and to suggest a renewed understanding of subsidies on three aspects.Firstly, unlike in public law, a subsidy must be viewed as a unilateral contract, not a unilateral act. It is important indeed not to confuse the expression of consent by a legal entity, which results from a unilateral act, with the act of granting a subsidy, which is contractual in nature. A subsidy is also just a type of financial support. It is characterized by a direct wealth transfer from the grantor of the subsidy to its beneficiary, valued on the achievement of a specific goal. These two elements are essential as they differentiate a subsidy from other types of private companies’ support mechanisms (such as debt relief, loans, underpriced or overpriced transactions) and show that being goal-oriented does not commit the beneficiary to realizing the stated objective, rather it is the binding nature of a contract that enforces this obligation. In case of non-compliance, the subsidized entity will be subject to the contract’s termination clauses for being in default of its contractual obligations, a forced contractual compliance being not possible as it remains a management decision. Finally, a subsidy is not exactly an unconditioned financial support, rather it is a support without direct obligations. If its grantor often aims to obtain a direct benefit against the issuance of a subsidy, it often obtains nothing. This alternative reflects the specificity of a subsidy as it can be given for free or not. In other words, a subsidy is a neutral act which explains its numerous practical difficulties. More precisely, as a neutral contract, a subsidy does not express a specific reason, in each case it must thus be assessed if the issuer has a vested interest in the granting of the said subsidy. This research is of great interest, as a subsidy granted for free, in particular by a private enterprise, has consequences in terms of company law – breach of the “specialty” principle – tax law – customary managerial decisions – and criminal law. Showing the limits of the freedom to subsidize private companies contributes to reveal the civil and tax identity of a neutral act
Ngo, Van Quang Binh. "Algorithmes de conception de lois de commande prédictives pour les systèmes de production d’énergie." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC031/document.
Full textThis thesis aims to elaborate new control strategies based on Model Predictive control for wind energy generation system. We addressed the topology of doubly fed induction generator (DFIG) based wind generation systems which is suitable for generation platform power in the range in 1.5-6 MW. Furthermore, from the technological point of view, the three-level neutral-point clamped (3L-NPC) inverter configuration is considered a good solution for high power due to its advantages: capability to reduce the harmonic distortion of the output voltage and current, and increase the capacity of the converter thanks to a decreased voltage applied to each power semiconductor.In this thesis, we presented a detailed description of finite control set model predictive control (FCS-MPC) with two step horizon for two control schemes: grid and DFIG connected 3L-NPC inverter. The principle of the proposed control scheme is to use system model to predict the behaviour of the system for every switching states of the inverter. Then, the optimal switching state that minimizes an appropriate predefined cost function is selected and applied directly to the inverter.The study of issues such as delay compensation, computational burden and selection of weighting factor are also addressed in this thesis. In addition, the stability problem of FCS-MPC is solved by considering the control Lyapunov function in the design procedure. The latter study is focused on the compensation of dead-time effect of power converter
Valdez, Michael Simon. "The effects of vehicle station keeping and end effector disturbance compensation on neutral buoyancy teleoperation." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/47329.
Full textYu, Wumin. "Interfacial Structure of Bilayer Compensation Films Prepared by Direct Coating Process." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1353304726.
Full textDurandau, Guillaume. "Traitement des signaux EMG et son application pour commander un exosquelette." Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/6987.
Full textMalmgren, Vilma. "”Vi bidrar till en hållbar utveckling” : En studie över medias framställning av flygverksamheters klimatkompensation." Thesis, Karlstads universitet, Institutionen för samhälls- och kulturvetenskap (from 2013), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-77467.
Full textDue climate change and global warming, effects are created which create negative impacts at humans as well the environment. Reducing the amount of generated greenhouse gas emissions is a fundamental measure for managing environmental impacts. At the same time, consumption of foreign air travel from Sweden has increased and doubled since the 1990s, which is a major factor contributing to the problem. Thus, climate compensation is used as a tool to replace the environmental values lost due to emissions created by aviation. The purpose of the study is to investigate the existing discourses around aviation climate compensation. The analyzed material consists of daily press collected from Swedish national medias and analyzed using the method of discourse analysis. The study resulted in three different discourses on climate compensation. In the different discourses, the concept of climate compensation varies depending on the context. The result shows that climate compensation is used to alleviate people's concerns about climate change and also to depict a climate-impacting business as sustainable. Climate compensation is also used in case of managing the amount of emissions exceeding the maximum allowed amount of emissions generated by aviation operations. In the discourses, criticism is also directed at the tool's credibility, transparency and socio-economic impacts.
Langner, Jens. "Event-Driven Motion Compensation in Positron Emission Tomography: Development of a Clinically Applicable Method." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-23509.
Full textDie Positronen-Emissions-Tomographie (PET) ist ein in der Nuklearmedizin etabliertes funktionelles Schnittbildverfahren, das es erlaubt Informationen über biochemische und physiologische Prozesse in vivo zu erhalten. Die derzeit erreichbare räumliche Auflösung des Verfahrens beträgt etwa 5 mm für Hirnaufnahmen und etwa 8 mm für Ganzkörperaufnahmen, wobei erste verbesserte Bildrekonstruktionsverfahren eine Machbarkeit von 2 mm Auflösung in Zukunft möglich erscheinen lassen. Durch das geringe Signal/Rausch-Verhältnis des Messverfahrens, aber auch durch die Tatsache, dass der Stoffwechsel des Patienten über einen längeren Zeitraum betrachtet wird, betragen typische PET-Aufnahmezeiten mehrere Minuten bis Stunden. Dies hat zur Folge, dass Patientenbewegungen zunehmend die erreichbare räumliche Auflösung dieses Schnittbildverfahrens limitieren. Eine Immobilisierung des Patienten zur Reduzierung dieser Effekte ist hierbei nur bedingt hilfreich. Es kommt daher zu einer relevanten Auflösungsverschlechterung sowie zu einer Verfälschung der quantifizierten Stoffwechselparameter. Die vorliegende Arbeit beschreibt die Nutzbarmachung eines neuartigen Bewegungskorrekturverfahrens für klinische PET-Hirnaufnahmen. Mittels eines externen Bewegungsverfolgungssystems wird während einer PET-Untersuchung kontinuierlich die Kopfbewegung des Patienten registriert. Anhand dieser Bewegungsdaten führt ein neu entwickelter event-basierter Bewegungskorrekturalgorithmus eine räumliche Korrektur aller registrierten Koinzidenzereignisse aus und nutzt somit die als "List-Mode" bekannten Rohdaten eines PET Systems. Für die Akquisition dieser Daten wurden eigens Methoden entwickelt, die es erstmals erlauben, diese Rohdaten von einem ECAT Exact HR+ PET Scanner innerhalb eines akzeptablen Zeitraumes zu erhalten. Des Weiteren wurden Methoden für die klinische Akquisition der Bewegungsdaten sowie für die automatische Auswertung dieser Daten entwickelt. Ebenfalls Teil der Arbeit waren die Entwicklung von Methoden zur Integration in die klinische Routine (z.B. graphische Nutzeroberflächen). Nach der Entwicklung, Optimierung und Integration der event-basierten Bewegungskorrektur für die klinische Nutzung wurden Analysen anhand von Beispieldatensätzen vorgenommen. Es zeigten sich bei der Auswertung sowohl der qualitativen als auch der quantitativen Effekte deutliche Änderungen. In qualitativer Hinsicht wurden Bildartefakte eliminiert; bei der quantitativen Auswertung einer FDOPA Messung zeigte sich eine revelante Änderung der R0k3 Einstromraten eines irreversiblen Zweikompartment-Modells mit Referenzgewebe. Es konnte somit gezeigt werden, dass eine Integration einer Bewegungskorrektur unter Zuhilfenahme der Rohdaten eines PET Systems sowie unter Nutzung eines externen Verfolgungssystems nicht nur sinnvoll und in der klinischen Routine machbar ist, sondern auch zu maßgeblichen qualitativen und quantitativen Verbesserungen in der PET-Bildgebung beitragen kann
Langner, Jens. "Event-Driven Motion Compensation in Positron Emission Tomography: Development of a Clinically Applicable Method." Doctoral thesis, Forschungszentrum Dresden-Rossendorf e.V, 2008. https://tud.qucosa.de/id/qucosa%3A25077.
Full textDie Positronen-Emissions-Tomographie (PET) ist ein in der Nuklearmedizin etabliertes funktionelles Schnittbildverfahren, das es erlaubt Informationen über biochemische und physiologische Prozesse in vivo zu erhalten. Die derzeit erreichbare räumliche Auflösung des Verfahrens beträgt etwa 5 mm für Hirnaufnahmen und etwa 8 mm für Ganzkörperaufnahmen, wobei erste verbesserte Bildrekonstruktionsverfahren eine Machbarkeit von 2 mm Auflösung in Zukunft möglich erscheinen lassen. Durch das geringe Signal/Rausch-Verhältnis des Messverfahrens, aber auch durch die Tatsache, dass der Stoffwechsel des Patienten über einen längeren Zeitraum betrachtet wird, betragen typische PET-Aufnahmezeiten mehrere Minuten bis Stunden. Dies hat zur Folge, dass Patientenbewegungen zunehmend die erreichbare räumliche Auflösung dieses Schnittbildverfahrens limitieren. Eine Immobilisierung des Patienten zur Reduzierung dieser Effekte ist hierbei nur bedingt hilfreich. Es kommt daher zu einer relevanten Auflösungsverschlechterung sowie zu einer Verfälschung der quantifizierten Stoffwechselparameter. Die vorliegende Arbeit beschreibt die Nutzbarmachung eines neuartigen Bewegungskorrekturverfahrens für klinische PET-Hirnaufnahmen. Mittels eines externen Bewegungsverfolgungssystems wird während einer PET-Untersuchung kontinuierlich die Kopfbewegung des Patienten registriert. Anhand dieser Bewegungsdaten führt ein neu entwickelter event-basierter Bewegungskorrekturalgorithmus eine räumliche Korrektur aller registrierten Koinzidenzereignisse aus und nutzt somit die als "List-Mode" bekannten Rohdaten eines PET Systems. Für die Akquisition dieser Daten wurden eigens Methoden entwickelt, die es erstmals erlauben, diese Rohdaten von einem ECAT Exact HR+ PET Scanner innerhalb eines akzeptablen Zeitraumes zu erhalten. Des Weiteren wurden Methoden für die klinische Akquisition der Bewegungsdaten sowie für die automatische Auswertung dieser Daten entwickelt. Ebenfalls Teil der Arbeit waren die Entwicklung von Methoden zur Integration in die klinische Routine (z.B. graphische Nutzeroberflächen). Nach der Entwicklung, Optimierung und Integration der event-basierten Bewegungskorrektur für die klinische Nutzung wurden Analysen anhand von Beispieldatensätzen vorgenommen. Es zeigten sich bei der Auswertung sowohl der qualitativen als auch der quantitativen Effekte deutliche Änderungen. In qualitativer Hinsicht wurden Bildartefakte eliminiert; bei der quantitativen Auswertung einer FDOPA Messung zeigte sich eine revelante Änderung der R0k3 Einstromraten eines irreversiblen Zweikompartment-Modells mit Referenzgewebe. Es konnte somit gezeigt werden, dass eine Integration einer Bewegungskorrektur unter Zuhilfenahme der Rohdaten eines PET Systems sowie unter Nutzung eines externen Verfolgungssystems nicht nur sinnvoll und in der klinischen Routine machbar ist, sondern auch zu maßgeblichen qualitativen und quantitativen Verbesserungen in der PET-Bildgebung beitragen kann.
Roost, Pauline. "Evaluation of the Dopaminergic System Using In Vivo PET Imaging and Post-Mortem Analyses in the Context of Mild Neurodegenerative and Neuroinflammatory PD Models." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS086.
Full textThe cerebral pathology of Parkinson’s disease is characterized by a progressive loss of dopaminergic neurons of the substantia nigra, and an accumulation of α-synuclein aggregates. neuroinflammation and genetic predisposition contribute to PD as the main confounding factors. In this PhD thesis, I aimed to evaluate, in vivo and post-mortem, the effects of three factors on the dopaminergic system: 1) α-synuclein overexpression, 2) α-synuclein and LRRK2 co-expression, and 3) mild neuroinflammation, on the dopaminergic system and dopaminergic neuronal cell loss.To this end, positron emission tomography (PET) imaging and behavioural studies have been selected as the main in vivo tools. I have used [18F]LBT999 and [18F]FMT PET imaging to evaluate striatal levels of dopamine transporter (DAT) and the dopamine-synthesising AADC enzyme, respectively. To assess neuroinflammation, I have used [18F]DPA714 to evaluate 18kDa TSPO binding. The in vivo data were validated by post-mortem techniques evaluating the expression of genes (qPCR) and proteins (immunohistochemistry).The results of my work show that overexpression of human WT-α-synuclein in the substantia nigra through viral vectors (AAV2/6-PGK-WT-α-synuclein) does not generate detectable neuronal loss in the substantia nigra, nor does it generate in vivo motor deficits or changes in the dopaminergic system as seen by in vivo PET imaging. On the other hand, I have demonstrated here that overexpression of A53T-α-synuclein in the substantia nigra, using an AAV2/6-PGK-A53T-α-synuclein viral vector approach, resulted in significant α-synuclein aggregation in the substantia nigra as soon as 8wpi, but not in the striatum. Quantitative microscopic analyses show that A53T-α-synuclein aggregation induced a mild but progressive degeneration of dopaminergic neurons in the substantia nigra. The loss of dopaminergic fibres in the striatum as detected by immunohistochemistry of tyrosine hydroxylase (TH) remains, however, moderate. DAT-PET imaging, but not AADC-PET imaging, was able to measure the progressive neuronal loss. Taken together, our in vivo and post-mortem data suggest that DAT-PET does not only reflect neuronal loss induced by α-synuclein accumulation, but also functional compensation mechanisms of the dopaminergic synapse. A reduction in DAT levels, combined with normal TH and AADC levels, could normalise the synaptic dopamine concentrations in the striatum. In addition, this dopaminergic neuronal loss coincided with in initially moderate, followed by a more pronounced microglial response. Finally, in a viral vector model of co-overexpression of AAV2/6-PGK-A53T-α-synuclein and AAV2/6-PGK-G2019S-LRRK2, we did not observe added neurotoxicity of G2019S mutated LRRK2 to A53T-α-synuclein toxicity.In an acute neuroinflammatory model following LPS injection in the striatum, post-mortem analysis revealed the absence of dopaminergic neuronal loss in the substantia nigra and synaptic loss in the striatum. Nevertheless, I observed a significant inverse correlation between inflammation markers (TSPO-PET and IBA1 expression) and markers for dopamine production (TH) and storage (VMAT2). These data support the hypothesis that neuroinflammation may impair the functionality of the dopaminergic system, regardless of the presence dopaminergic neuron loss.In summary, my thesis results confirm the interest of PET in demonstrating functional damage in vivo, which cannot be demonstrated post-mortem in animal models of PD
Zevallos, Alcahuaman Milton Elvis 1974. "Analise de sensibilidade da corrente de arco secundario para diferentes linhas de transmissão." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259605.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
Made available in DSpace on 2018-08-10T09:15:34Z (GMT). No. of bitstreams: 1 ZevallosAlcahuaman_MiltonElvis_M.pdf: 2029693 bytes, checksum: 59155e98cbc8a1da85069d7cec8f451e (MD5) Previous issue date: 2007
Resumo: O arco secundário surge na manobra de abertura monofásica durante a eliminação de faltas monofásicas não permanentes para terra. O problema se apresenta especialmente nas linhas de EAT, no isolamento aéreo, em faltas que têm características não permanentes. Neste trabalho analisamos diferentes linhas de transmissão com níveis de tensão de 345 kV até 765 kV e com comprimentos de 150 km até 900 km, variando seu nível de compensação reativa em derivação de 40 % até 100 % e para as linhas mais longas compensando também 50 % da sua impedância longitudinal. Em linhas de EAT com compensação reativa em derivação é possível aproveitar a associação dos reatores adicionando um reator de neutro para minimizar o acoplamento mútuo entre as fases das linhas de transmissão, sendo este acoplamento a causa principal da manutenção da corrente de arco secundário. Com valores de reatores de neutro ótimos minimizamos a corrente de arco secundário e avaliamos a viabilidade da aplicação do religamento monofásico nos sistemas em estudo, aumentando o desempenho e confiabilidade dos sistemas elétricos
Abstract: The secondary arc appears in single-phase switching during clearing of non-permanent ground single-phase to ground faults. The problem happens especially on EHV lines, on aerial isolation, in faults with non permanent characteristics. In this work different transmission lines with voltage levels of 345 kV up to 765 kV and with 150 km up to 900 km length are analyzed, varying its level of reactive shunt compensation from 40 % up to 100 % and for the longest lines compensating 50 % of its longitudinal impedance. In EHV lines with have reactive shunt compensation, it is possible to add a neutral reactor in order to minimize the phase coupling of the transmission lines, being this coupling the main cause for the maintenance of the secondary arc current. With optimal values of neutral reactors it was possible to minimize the secondary arc current and evaluate the viability of the application of the single-phase reclosure in the systems under study, increasing the performance and reliability of the electrical systems
Mestrado
Energia Eletrica
Mestre em Engenharia Elétrica
Sunny, Mohammed Rabius. "Towards Structural Health Monitoring of Gossamer Structures Using Conductive Polymer Nanocomposite Sensors." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/28797.
Full textPh. D.
Hedberg, Agnes Holm. "Klimatneutrala byggnader : En utredning av begreppet och jämförelse mellan olika definitioner." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290800.
Full textClimate change is one of today’s biggest threats for humanity and if the global greenhouse gas emissions do not drastically decrease during the near future, this could have severe consequences for the world. In line with these challenges, global and national goals have been developed which aim to foster climate-neutral societies and industries. Since the climate effect from the building industry has shown to be major, it is important to consider emissions from this sector. During the recent years, several definitions of climate-neutrality in the built environment have been presented, which is a strategy considered to be important in order to reduce the climate impact from this field. Therefore, this project aimed to investigate different definitions of climate-neutrality in the building industry with the focus ‘climate-neutral buildings’. Seven tools were included, with a mix of regional, national and international focus, which all have presented a unique definition of a climate-neutral building. To settle the project in a clear context, a literature review became the first step. Thereafter, a document analysis was conducted as well as an interview study with tool developers with good insight into the framing of the different tools that were investigated. The result showed that the definitions differ in terms of defined system boundaries and actions chosen to achieve climate-neutrality. All of the investigated tools promoted that renewable energy and electrification lay the foundation for the climate-neutral building definition. However, the climate actions presented for compensating and balancing the emissions differed. The presented actions included, above all: production (and export) of renewable energy, carbon offsets, and storage capacity of biocarbon in wood material. Additionally, the tools presented other actions which included energy-efficiency in existing buildings, technical solutions for long-term storage of carbon, carbonization of concrete, value connected to reuse of material and energy, as well as reduced energy-peak demand. The system boundaries differed in terms of inclusion of life cycle modules, from focusing on the most important and accurate stages, to include the full lifecycle of a building. Furthermore, the study identified challenges connected to the definition of climate-neutral buildings. These included, above all, lack of (high-quality) data, the need to use fictitious numbers and assumptions, as well as insecurities connected to the future, including the composition of the electricity mix and how the electricity grid will handle the electrification of the built environment. All these aspects indicate that the term climate-neutral building as for now lacks consensus and that there are challenges connected to this field. Therefore, 2 more evaluation seems to be needed and it might be reasonable to consider if climate neutral buildings as a concept is mature enough to be used, or if this should be avoided to prevent confusion and misunderstandings.
Senate, University of Arizona Faculty. "Faculty Senate Minutes November 3, 2014." University of Arizona Faculty Senate (Tucson, AZ), 2014. http://hdl.handle.net/10150/336522.
Full textHsiao, Hsin-Hsing, and 蕭新興. "A Novel Power Filter Structure for Harmonic Compensation and Neutral Current Suppression." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/70249966587046810787.
Full text國立高雄應用科技大學
電機工程系博碩士班
96
In this thesis, a new three-phase four-wire hybrid power filter will be proposed. This hybrid power filter is configured by a tuned power filter and a four-arm power converter. The power converter is connected to the inductor of tuned power filter in parallel so as to simultaneously reduce both the voltage rating and current rating. However, the performance of this new three-phase four-wire hybrid power filter is degraded under the non-ideal utility and unbalanced load conditions. To solve the problems of new three-phase four-wire hybrid power filter, a new three-phase four-wire power filter system is further developed. The new three-phase four-wire power filter system combines a neutral current attenuator into the new hybrid power filter, and the power converter of new hybrid power filter can be replaced by a three-arm bridge structure. The new hybrid power filter is used to suppress the non-zero sequence harmonic current, and the neutral current attenuator is used to attenuate the neutral current and suppress the zero sequence harmonic current of the utility grid. Thus, the problems of the neutral line current and harmonic pollution in the three-phase four-wire distribution power system are solved effectively. To verify the performance of both new three-phase four-wire hybrid power filter and new three-phase four-wire power filter system, the computer simulation is made and hardware prototypes are developed and tested. Both simulation and experimental results verify that performance of the proposed three-phase four-wire hybrid power filter system is as expected.
Bunch, Steven Curtis. "A low noise CMOS charge-sensitive preamplifier with pole/zero compensation for a neutron detection system." 2006. http://etd.utk.edu/2006/BunchSteven.pdf.
Full textLiu, Yu-Zhe, and 劉宇哲. "Mitigation of High Current Imbalance and Neutral Current in Three Phase Distribution System by Using Reactive Power Compensation." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/k48c98.
Full text國立臺灣科技大學
電機工程系
106
When the distribution system supplies three-phase unbalanced linear loads, non-linear loads, photovoltaic systems and open wye-open delta transformers or single-phase transformers, these non-three-phase balanced devices will cause high current imbalance and neutral current. This thesis is used to analyze four types of three-phase three-wire reactive power compensation methods and a three-phase four-wire reactive power compensation method to improve the current imbalance problem. It is based on a three-phase four-wire multi-grounded distribution system which is established by the Matlab/Simulink. It also studies the neutral current caused by harmonic current sources from non-linear loads and equivalent photovoltaic systems. According to the simulation results, the compensation methods can mitigate problems of high current imbalance and neutral current which is caused by three-phase three-wire unbalanced loads and open wye-open delta transformers. At the same time, after filtering the harmonic current by the filter, the total harmonic distortion of current can be effectively reduced, and the power quality can be improved.