Дисертації з теми "Power transmission line performance"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Power transmission line performance".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Liang, Feng. "Performance enhancement of digital relays for transmission line distance protection /." Internet access available to MUN users only, 2003. http://collections.mun.ca/u?/theses,153681.
Повний текст джерелаMukherjee, Tonmoy Shankar. "High performance, low-power and robust multi-gigabit wire-line design." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/39515.
Повний текст джерелаMthunzi, 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.
Повний текст джерелаPower 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 the electric power system. The power system transmission lines are susceptible to faults which require instant isolation to establish and maintain consistent system stability. This research focuses on the study of transmission line protection based on P-Class synchrophasor measurements. The IEEE C37.238-2011 Precision Time Protocol (PTP) paradigm shift facilitates practical application of synchrophasors in protection schemes. Synchrophasor procession and accurate data alignment over wide areas support the hypothesis of a phasor-based transmission line differential protection. This research aims to directly implement P-Class synchrophasors in transmission line differential protection, employing synchrophasors to determine fault conditions and administer corresponding protective actions in wide area transmission lines. The research also aims to evaluate the operational characteristics of the synchrophasor-based transmission line differential protection scheme. The research deliverables include a laboratory scale Test-bench that implements the PMU-based transmission line differential protection scheme, and a differential protection utility software solution that follows guidelines specified by the C37.118-2011 standard for synchrophasors. The findings stand to evaluate performance of the PMU-based line differential protection scheme, verifying the protection model as an alternate, practical and feasible backup protection solution. The research deliverables include a synchrophasor-based current differential algorithm, software utility for implementing the PMU-based protection scheme and a Test-bench for concept and feasibility validation.
Adebisi, Bamidele. "Broadband Transmission over indoor Power-line channels." Thesis, Lancaster University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.536027.
Повний текст джерелаLu, Liping. "Performances and quality of service of PLC networks for MV and LV distribution systems." Thesis, Vandoeuvre-les-Nancy, INPL, 2006. http://www.theses.fr/2006INPL080N/document.
Повний текст джерелаDans cette thèse, nous nous intéressons à la problématique liée à la communication numérique sur courant porteur dans l’objectif de fournir une infrastructure de communication qui permet la surveillance et le contrôle de la distribution et de la consommation de l’énergie. Ce travail a été effectué dans le cadre du projet européen REMPLI (Real-time Energy Management via Power Line and Internet) et a produit la spécification REMPLI PLC (Power Line Communication). Pour fournir une meilleure performance de la communication et effectuer le transfert de données en temps réel, en utilisant les réseaux électriques de moyenne tension et de basse tension, les problèmes principaux qui sont le routage dynamique de paquets de données, la gestion de la qualité de service et la notification des événement en temps réel, ont été traités. Nous avons développé un protocole de routage efficace pour s’adapter au changement dynamique de topologie du réseau électrique. Les performances de REMPLI PLC sont évaluées en utilisant des approches de simulation couplée avec des approches analytiques. Il est prouvé que la majorité des besoins applicatifs peuvent être satisfaite par REMPLI PLC. Nous avons proposé et implanté un nouvel “ordonnançeur de traffic” fournissant différents niveaux de qualité de service pour les applications. Des variantes de protocole ALOHA ont été proposées et évaluées afin de vérifier que les propriétés temps réel requises sur les notifications d’événements sont respectées
Ahmeda, Mohammad. "Earthing performance of transmission line towers." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/42730/.
Повний текст джерелаAlavi, Hessam. "Acoustics of high performance transmission-line loudspeakers." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/388041/.
Повний текст джерелаTaylor, Gareth Andrew. "A high voltage transmission line for space power systems." Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315620.
Повний текст джерелаChakrabarti, Abhimanyu. "Transmission line matrix modelling for semiconductor transport." Thesis, University of East Anglia, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338228.
Повний текст джерелаChen, Dian. "Transmission line modelling (TLM) of physical systems." Thesis, University of Sheffield, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361632.
Повний текст джерелаShen, Bin. "Analysis on adverse-weather-related power transmission line outages." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0017/MQ47093.pdf.
Повний текст джерелаLiu, Xiaopeng. "Power system dynamic vulnerability under extreme transmission line contingencies." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18782.
Повний текст джерелаLes réseaux électriques peuvent être sous la menace de conditions extrêmes, tels que désastres naturels et attentats terroristes. Pour déterminer la condition la plus sévère en état stationnaire, des méthodes systématiques utilisant des techniques d'optimisations ont été développées. Jusqu'à présent il n'existe cependant pas de méthodes systématiques pour déterminer quel défaut est le plus sévère en régime dynamique. Cette thèse propose une telle méthode. Elle utilise une approche en deux étapes, « triage et classement », similaire à celle utilisée dans une analyse de sécurité dynamique conventionnelle. Dans l'étape de triage, les lignes de transport d'électricité sont sélectionnées selon deux critères. Le premier est basé sur la sensibilité critique des valeurs propres par rapport à la perte d'une seule ligne. Une ligne de transport est sélectionnée seulement si une des valeurs propres critiques a une sensibilité élevée à la perte de cette ligne. Le second critère est basé sur une analyse topologique et recherche des ensembles de coupure dans le système. Une ligne de transport est sélectionnée si elle appartient à un ensemble de coupure avec un déséquilibre de puissance élevé. Dans l'étape de classement, une analyse temporelle est effectuée sur toutes les combinaisons possibles des lignes de transport sélectionnées dans la première étape, afin de déterminer leurs véritables impacts dynamiques sur le réseau électrique. Les relais de protection sont représentés. Les résultats des simulations sur le système test IEEE96 démontrent que l'étape de triage peut réduire le nombre de défauts de manière significative, ce qui peut alléger considérablement le fardeau de calcul dans l'étape de classement. Les défauts les plus sévères en termes de délestage étaient identifiés dans la plupart des cas par la méthode proposée. L'intérêt de la méthode réside dans sa simplicité,$
Mansour, Tony, and Majdi Murtaja. "Applied estimation theory on power cable as transmission line." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-46583.
Повний текст джерелаDe, Villiers Dirk I. L. "Analysis and design of conical transmission line power combiners." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/607.
Повний текст джерелаShahri, Javad Yazdani Kohneh. "High frequency digital power line transmission for terrestrial and marine networks." Thesis, Lancaster University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288950.
Повний текст джерелаKeen, Alan G. "Planar transmission line analyses using the Method of Lines." Thesis, University of Kent, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293993.
Повний текст джерелаPatel, Hitesh Narhari 1970. "Self adjusting transmission line drivers for high performance systems." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/278274.
Повний текст джерелаShehab-Eldin, Elsayed Hassan. "Travelling wave distance measurement in E.H.V. power systems." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254446.
Повний текст джерелаWilson, Colin Richard. "The design and development of fast pulsed power supplies using Transmission Line Transformers." Thesis, University of St Andrews, 1992. http://hdl.handle.net/10023/13600.
Повний текст джерелаBaisden, Andrew Carson. "Modeling and Characterization of Power Electronic Converters with an Integrated Transmission-Line Filter." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33188.
Повний текст джерелаMaster of Science
Roongsita, Somsak. "Simulation and study of harmonic interference in power line communications." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/101256.
Повний текст джерелаM.S.
Abdelhalim, Hussein Mohamed. "Stability effects of frequency controllers and transmission line configurations on power systems with integration of wind power." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78461.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 52-53).
This thesis investigates the stability effects of the integration of wind power on multi-machine power systems. First, the small-signal stability effects of turbine governors connected to synchronous generators in the presence of large-scale penetration of wind and load power disturbances are analyzed. Results suggest that tuning the turbine governors when wind power generation is present can improve the small-signal stability of an interconnected system. Then, the transient stability effects of integrating doubly-fed induction wind turbine generators through different transmission line configurations and at different buses are analyzed. Results show that connecting the wind through transmission lines and to different buses introduces a delay in the oscillatory response of the synchronous generator speed, and bus voltage oscillations are also affected. Results also show that there is no significant effect on the base cases when using different interconnection voltages to connect the wind. Overall, the results can be used by power system operators when making decisions on turbine governor tuning and transmission line configurations when connecting wind farms to existing power systems while optimizing for small-signal and transient stability response.
by Hussein Mohamed Abdelhalim.
S.M.
Kirawanich, Phumin. "Fuzzy logic control for an active power line conditioner /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3060114.
Повний текст джерелаChen, Yaow-Ming. "Active power line conditioner with neural network control /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841132.
Повний текст джерелаLahmar, Mustafa. "ESTIMATION OF TRANSMISSION LINE PARAMETERS USING LINEAR METHOD WITH SYNCHRONIZED AND UNSYNCHRONIZED DATA." UKnowledge, 2019. https://uknowledge.uky.edu/ece_etds/135.
Повний текст джерелаNajafi, Syed Ahmed Ali. "Energy Harvesting From Overhead Transmission Line Magnetic Fields." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1548448189459464.
Повний текст джерелаBridgeman, M. "Algorithms for on-line measurement of harmonic damping and avoidance of harmonic resonances due to power factor capacitor switching in distribution systems." Thesis, Staffordshire University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272760.
Повний текст джерелаBeyers, Ryno Dawid. "Circuit model design of conical transmission line power combiners and isolation of reactive combiners." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96976.
Повний текст джерелаENGLISH ABSTRACT: This dissertation presents a circuit-based design technique that leads to benefits in terms of the physical size, manufacturability, and exibility in the design of N-way conical line power combiners. An equivalent circuit model for the peripheral input ports of conical line power combiners is extracted, as well as empirical equations that allow the circuit element values to be calculated directly from the physical dimensions of the combiner, and vice versa. This allows for rapid optimization of various dimensions of the combiner at a significantly reduced computational cost compared to full-wave simulations. A design procedure is presented and a conical combiner designed with a measured reflection coefficient of better than -18 dB over a 46 % bandwidth around 10 GHz. The designed prototype is much smaller compared to previous designs while exhibiting similar performance. Design procedures for single-section and multi-section impedance tapered conical to coaxial line transitions are also presented, which can be used to simplify the design of conical combiners and reduce the manufacturing effort. Two combiners are designed, one with a single-section and one with a multi-section transition, and output port reflection coefficients of -23 dB and -17 dB over bandwidths of 20 % and 43 % around 10 GHz are measured, respectively. This dissertation additionally presents a method that can be used in general to improve the input port isolation of N-way power combiners without affecting their reciprocity. A simple S-parameter proof is presented, followed by a derivation of equations that can be used to estimate the worst-case performance. Some design examples are presented, showing that terminations can be used for isolation loads. A prototype based on microstrip transmission lines is manufactured and a much improved input port reflection and isolation performance of -15 dB and 20 dB is measured, respectively, compared to a simulated input port reflection coefficient of -2:5 dB and isolation of 2:5 dB before the method was applied. ii
AFRIKAANSE OPSOMMING: Hierdie proefskrif stel 'n stroombaangebaseerde ontwerpsmetode voor wat lei tot voordele in terme van die fisiese grootte, vervaardigbaarheid, en vryheid in die ontwerp van koniese lyn kombineerders. 'n Ekwivalente stroombaanmodel vir die voerpoorte word onttrek, asook empiriese vergelykings wat gebruik kan word om die stroombaanelement waardes vanaf die afmetings van die kombineerder te bepaal. Dit laat die ontwerper toe om verskeie afmetings van die kombineerder te optimeer teen 'n beduidende laer koste in vergelyking met volgolf simulasies. 'n Ontwerpsprosedure word voorgestel en gebruik om 'n koniese kombineerder te ontwerp en 'n weerkaatskoëffisient van beter as -18 dB met 'n bandwydte van 46 % om 10 GHz word gemeet. Die prototipe is aansienlik kleiner as vorige ontwerpe, maar toon soortgelyke werkverrigting. Ontwerpsprosedures vir enkel en veelvoudige deel koniese na koaksiale lyn oorgange word ook voorgestel, wat gebruik kan word om die ontwerp en vervaardiging van koniese kombineerders te vereenvoudig. Twee kombineerders word ontwerp, een met 'n enkel deel oorgang en een met veelvoudige dele, en onderskeidelike uittree weerkaatskoëffisiente van -23 dB en -17 dB oor bandwydtes van 20 % en 43 % word gemeet. Hierdie proefskrif stel ook 'n metode voor wat gebruik kan word om die intree poort isolasie van N-rigting kombineerders in die algemeen te verbeter, sonder om die wederkerigheid daarvan te beïnvloed. 'n Bewys van die metode word gelewer, gevolg deur 'n afleiding van vergelykings wat gebruik kan word om die slegste-geval werkverrigting af te skat. Verskillende voorbeelde van kombineerders word getoon waarop die metode toegepas is, en wys dat terminasies gebruik kan word vir die isolasie laste. 'n Prototipe gebaseer op mikrostrook transmissielyne word vervaardig en 'n verbeterde intreepoort weerkaatskoëffisient en isolasie van onderskeidelik -15 dB en 20 dB word gemeet, in vergelyking met 'n weerkaatskoëffisient van -2:5 dB en isolasie van 2:5 dB voordat die metode toegepas is.
Katakam, Sri. "Design of Multi Band Microwave Devices Using Coupled Line Transmission Lines." Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc801903/.
Повний текст джерелаRistanovic, Dragan. "New methodology for transmission line relay testing and evaluation using advanced tools." Texas A&M University, 2003. http://hdl.handle.net/1969.1/355.
Повний текст джерелаKiani, Mehdi. "Wireless power and data transmission to high-performance implantable medical devices." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53396.
Повний текст джерелаKhomejani, Shabnam. "Performance enhancement of cognitive radio networks via multi-power level transmission." Thesis, King's College London (University of London), 2017. https://kclpure.kcl.ac.uk/portal/en/theses/performance-enhancement-of-cognitive-radio-networks-via-multipower-level-transmission(0f0a8ae7-cdab-48ba-b741-e5bd720effa8).html.
Повний текст джерелаDe, Villiers Wernich. "Prediction and measurement of power line carrier signal attenuation and fluctuation." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52410.
Повний текст джерелаENGLISH ABSTRACT: A frequency domain Power Line Carrier (PLC) simulation program, with the ability to simulate signal attenuation including the coupling equipment, was developed. This simulation program was put to the test against the independent program of Professor L.M. Wedepohl and against practical field measurements. The predictions of the two programs were in precise agreement for a wide range of input parameters. Results from the field tests and predictions also showed close agreement. Further investigations, applying the simulation program, explained how ground conductors and soil resistivity influences PLC signal propagation. An experiment, which was developed to monitor PLC signal attenuation, was installed on the PLC system between Koeberg power station and Acacia substation, both near Cape Town. Data logged continuously over 28 days, indicated measurable and deterministic PLC signal attenuation variations with typical time constants of a few hours. Simulations of the PLC system indicated that the signal amplitude variations were influenced by changes in the height above the ground plane of the phase conductor. This significant finding creates the possibility to obtain real time knowledge of the sag of an Over Head Transmission Line (OHTL) by exploiting an operational PLC system. The knowledge about real time sag can be used in economical dynamic ampacity control systems. The practical and financial benefits to the electricity supply and distribution industry can be significant.
AFRIKAANSE OPSOMMING: 'n Frekwensie gebied "Power Line Carrier" (PLC) simulasie program wat die sein verswakking en die koppeling verliese kan naboots, is ontwikkel. Die program is getoets teen die onafhanklike program van Professor L.M. Wedepohl asook praktiese metings in die veld. Die vooruitskatings van beide programme is presies die selfde vir 'n wye reeks van parameters. Metings en nabootsings het ook noue ooreenstemming getoon. Verdere ondersoek, m. b. v. die program, is gedoen ten einde te verduidelik hoe grond-geleiers en grond weerstand die PLC sein se voortplanting beïnvloed. 'n Eksperiment om die PLC sein se verswakking mee te monitor is ontwerp. Die eksperiment was geïnstalleer in die PLC stelsel tussen Koeberg kernkragstasie en Acacia substasie, naby Kaapstad. Die eksperiment was vir 28 dae geaktiveer en die data wat die eksperiment opgelewer het toon meetbare PLC sein verswakking met tyd konstantes van 'n paar uur. Verdere nabootsings het gewys dat die veranderende verswakking in die PLC seinsterkte toegeskryf kan word aan die wisseling in hoogte van die fase geleiers bo die grondvlak. Hierdie bevinding is van besondere belang aangesien dit die moontlikheid oopmaak om die gemiddelde sak van kraglyne in reële tyd en onder bedryfs toestande te kan meet. Die informasie van die reële sak van kraglyne kan gebruik word in effektiewe stroomdrae-vermoë beheer stelsels. Die praktiese en finansiële voordele wat krag voorsieners en verspreiders hieruit kan put kan aansienlik wees.
MacNeill, Aaron. "Submarine Power Cable Transmission Line Parameters and Performance." 2012. http://hdl.handle.net/10222/15470.
Повний текст джерелаGoyal, Anuj. "Performance Enhancement of Power Line Communication Using OFDM and CDMA." Thesis, 2013. http://ethesis.nitrkl.ac.in/5411/1/211EC3308.pdf.
Повний текст джерелаMatshidza, Rhulani Daphney. "Improved transmission line protection performance concerning high resistance faults." Thesis, 2006. http://hdl.handle.net/10413/2211.
Повний текст джерелаThesis (M.Sc.Eng.)-University of KwaZulu-Natal, Durban, 2006.
Jena, Smrutisinha. "Performance Analysis of Transmission Line Using Upfc With Pi and Fuzzy Controller." Thesis, 2016. http://ethesis.nitrkl.ac.in/8083/1/2016-Mtech--214EE4543-Performance.pdf.
Повний текст джерелаDe-MingLin and 林德銘. "Performance Analysis and Strategy Evaluations of Line Arresters for Lightning Restriction on Electric Power Transmission Lines." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/04632345744732021207.
Повний текст джерела國立成功大學
電機工程學系碩博士班
98
This thesis is aimed to investigate the lightning restriction performance of line arresters installed in overhead transmission lines, through which the results are gained as a useful reference to decrease the flashover accidents and increase the operation reliability. In the thesis, the data of lightning statistics is first collected such that the lightning model related with transmission lines can be well constructed. Then, several placement strategies of line arresters are analyzed under different lightning locations and lightning energy. Meanwhile, the computation of failure rate of line arrester under various footing resistance is also well performed, thus anticipating the optimization of line arrester placement strategy can be better consolidated while the lightning restriction quality on overhead transmission lines can be highly improved.
LIN, SHYH-RU, and 林世孺. "Multi-objective Genetic Algorithm Solution to the Optimum Maintenance Performance Problem of Power Transmission Line." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/27943052852100329766.
Повний текст джерела中華大學
資訊管理學系碩士在職專班
101
The electrical power system is critical in modern economic activity, it will make seriously economic damage if power interrupted in accident. There are lots of ways to keep system running continuously to avoid such situation and lower property damage from the accident. The Power transmission line (PTL) is an important section of the whole network. How to keep it stable working and do not breakdown is most important issue in the power system. Normally, the foreman choice to maintain area monthly for network is arbitrary. They never care of cost and facility actual status whether requirement needed or not. In this paper, we will try to set up an algorithm that may find out what and where is the area that system maintains needed most urgently and cost efficiently, with four indexes: “the condition of PTL”, “the reliability of the PTL”, “interval of maintenance”, “minimize distance”, this study will indicate a Multi-objective decision-making method used for the maintenance of PTL to achieve the above four indicators. With these concepts of reliability, Hungarian method, genetic algorithm, etc. we’ll propose a Multi-objective decision-making method used for the maintenance of PTL .The four indicators parameters, can be adjusted by different target weights.Finally, relation to information technology of genetic algorithms,With the model of transmission maintenance implementation,We could solve PTL combinations results most appropriate. Compare algorithm with actually working record since January 2011 and expiring in December 2012, the algorithm is applied to 65 lines and two years examination.This study results with the findings that could satisfied our desirable purpose: minimize distance of Maintenance, while its reliability of persistent working could also be ensured and finaly reduce maintenance costs.
Yuan, Lin Ju, and 林車遠. "A Study on the Operation Performance for the Transmission Line System of Taichung Power Supply Branch of Taiwan Power Company." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/03452701202463861132.
Повний текст джерела臺中健康暨管理學院
經營管理研究所
93
A Study on the Operation Performance for the Transmission Line System of Taichung Power Supply Branch of Taiwan Power Company Abstract Electricity is the mother of industry, the island wide blackouts caused by July twenty-nine Event and September Twenty-first Earthquake in 1999 brings about great economic damages. This thesis aims to explore how to reach the highest managing achievement. The research method included questionnaire and specialist interview survey. A questionnaire was distributed to all interior employees of the transmission line system department in Tai-Chung branch of Taiwan Power Company, and exterior employees of the line system department in Tai-Chung, Chang-Hua, Nan-Tou district offices. In total 400 interior questionnaires, the 332 returned questionnaire, the valid returning rate numbered 83%. This research is to gather statistics regarding the managing achievement of the special maintaining personnel of transmission line system. The data was gathering by questionnaires of the balance scored cards and then analyzed with the SPSS program to discover the characteristics of managing achievement from sides of financial, customers, inner procedures, learning & grow up, executives and managing strategies. The result revealed that: 1.Evolving from one to ten power companies(including 9 IPP power plants), the composition is getting fiercely. Only can the strong teamwork develop great managing achievements. 2. The research was done by the balance scored cards from four sides of financial, customers, inner procedures, learning and grow up to discover the combined mechanism differences revealed that the four sides were distributed uniform, the company well good and the left rates was low. Distinguish from stable supply power and do well service to get profit; use well project can change supply power system weakness , shaau the expenditures and make provisions before troubles occur. The most important is to train employees and create a wisdom property right. 3. This research aims to explore the managing achievement of special environment and based on various interior operation principles, maintain the equipment and let supply power normal, and what’s more keep techniques, make natural disaster plan, do the well training, let employee has more loyalty, and then the company well get the goal
Maturu, Suresh. "Performance Evaluation Of Distance Relays For FACTS Compensated Transmission Lines." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/2084.
Повний текст джерелаMaturu, Suresh. "Performance Evaluation Of Distance Relays For FACTS Compensated Transmission Lines." Thesis, 2011. http://etd.iisc.ernet.in/handle/2005/2084.
Повний текст джерелаYen-Ting, Lo, and 駱彥廷. "A Study on the Relationships between Job Satisfaction and Job Performance for Dispatched worker.—An Example of Department of Transmission Line and Substation Projects, Taiwan Power Company." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/88113093340615191882.
Повний текст джерела國立中山大學
企業管理學系研究所
94
In recent years, more and more companies and enterprises started using dispatched worker. This new trend of “hiring, not employing” brought profound impact and challenges to the existing structure of labor-employer relations, as well as human resource management. Even in the government department. The main purpose of this study was to investigate the relationships between job satisfaction and job performance for government dispatched workers, taking Department of Transmission Line and Substation Projects(DTSP) as an example. There were 145 effectual samples in this study. Questionnaire survey was the main research method of this study. The research instrument included job satisfaction scale and job performance scale. The data were analyzed through Frequency Distribution, T-test, one-way ANOVA and Person Correlation Analysis. After this study analysis, the conclusion is made as follows: 1. The degree of DTSP dispatched workers’ job satisfaction (average score is 3.42, standard deviation (SD) is 0.52) is not so high as expected. The degree of DTSP dispatched workers’ job performance (average score is 3.71, standard deviation (SD) is 0.53) is belonged to normal level. 2. The dispatched workers’ job satisfaction and job performance are related significantly and positively. 3. For dispatched workers’ personal background, there are two variables which have influence to the job satisfaction, belonged department and belonged region . 4. For dispatched workers’ personal background, there are two variables which have influence to the job perfomance, belonged department and belonged region
Strelec, Gavin Jason. "Comparison of the lightning performance between the poles of the Cahora-Bassa ±533 kV HVDC lines." Thesis, 2016. http://hdl.handle.net/10539/21066.
Повний текст джерелаGS2016
Bortnik, Jacob. "Transmission line compaction using high phase order transmission." Thesis, 2016. http://hdl.handle.net/10539/20879.
Повний текст джерелаThis report discusses high phase order (HPO) technology, i.e. the use of more than the conventional 3 phases for transmission of electric power, its use in the compaction of lines, and power density maximization over existing servitudes. It is structured in four parts. The first part introduces the concepts, establishes the need, and lists the advantages ofHPO. The second part deals with the technology itself and shows that it is possible to analyze HPO systems using symmetrical component analysis, lists common transformer configurations, covers protection, and so on. The third part analyses 5 case studies, the first 3 being analytical, and the last 2 being the first experimental test line, and the world's :first utility application ofHPO lines. The fmal section is a South African case study and compares an HPO line to an existing 400 kV 3-phase line and shows that the former is 87.5% more expensive to implement than the latter. Comparing the 3-phase and 6-phase lines on a more even basis, yielded a breakeven distance of225.86 km, above which the 6-phase option becomes more economical. These results are then explained and discussed in the conclusions section.
Janse, van Rensburg P. A. "Effective coupling for power-line communications." Thesis, 2009. http://hdl.handle.net/10210/2442.
Повний текст джерелаThe technique of using a live power cable to simultaneously transport a communication signal, has been practiced since the early 1900’s. In most cases, power-line communications has been implemented as a retrofit technology, with its main benefit being the utilization of a ‘free’ existing network. This driving force of power-line communications is typical for high-, medium-, and low-voltage distribution networks, as well as intra-building networks currently targeted for home automation and home networking. Researchers have thus focused on the optimum use of these existing power-line channels, often accepting the inherent drawbacks of this hostile communication channel. Apart from unpredictable noise sources, two main disadvantages of the low-voltage powerline network as a communication channel, are i) the unknown power cable characteristics and topology and ii) time-dependent fluctuation of the power-line impedance level as loads are unpredictable switched into, and out of the network. These two factors have obscured the requirements for proper coupling and impedance adaptation to the degree that most researchers and manufacturers have merely accepted this typical ≈ 20-dB coupling loss as one of the inherited disadvantages of the power-line channel. Most researchers and manufacturers have thus defaulted to a guessed power-line impedance level, and have used one fixed coupler winding ratio under all circumstances, regardless of power-line conditions. This study has shown that proper coupling and impedance adaptation can yield significant transmission gains even with limited (qualitative) knowledge of a power-line channel and its topology. After formulating design steps for an impedance-adapting coupler that facilitates bidirectional transmission, the impact of the fluctuating power-line impedance on coupler bandwidth was investigated. Next, impedance adaptation strategies were considered and the tradeoff between series cable requirements and parallel load requirements was explored. A model of sufficient simplicity was developed to facilitate qualitative description and classification of power outlets – functioning as communication nodes. Very interesting simulation results were obtained and these were verified using a laboratory setup of characterized power cables and calibrated loads. Next, these simulation results were employed to improve power-line transmission over a live, uncharacterized 220-V residential network by means of i) classifying typical residential rooms qualitatively in order to choose proper coupler winding ratios and ii) using an innovative dual coupler for dedicated on-off switching with harsh loads, thereby mitigating the fluctuating impact of said loads on low-voltage power-line communications.
Yi-Shin, Wu, and 吳宜欣. "A Study on Transmission Properties of Power Line." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/10733013922542234833.
Повний текст джерела國立臺灣科技大學
電機工程系
92
The transmission properties of the power-line communications are studied to evaluate the possible applications of the power-line communications for Taiwan Power Company. The related regulations and current developments of the power-line communications are collected for references. Also, the transmission properties of the Taipower distribution systems are measured, and signal attenuation and impedance matching are evaluated. The transmission models of the power-line carriers are applied in order to analyze the signal propagation. Besides, measurements of the electromagnetic interferences due to the power-line carriers are performed and the noises possibly interfering the power-line communications are studied. Results obtained from this project may be applied in planning and deploying the power-line communications systems for Taiwan Power Company.
陳衍璋. "Signal transmission for vehicles using power line communications." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/00653043929258501825.
Повний текст джерела國立交通大學
電控工程研究所
100
We proposed a PLC system for transmitting signals in battery electrical vehicle via power line, and implemented it in an IC. The proposed system can support ten components. The tape-out IC have the following specification: The maximum data rate of the chip is 50 kbps. The die area is 3.74 mm2 and the technology is TSMC0.18 um. The power consumption of the chip is 45 mW.
Lin, Chyi-Taur, and 林祺濤. "A Study on Data transmission by Power Line." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/07881770229968358481.
Повний текст джерела國立高雄第一科技大學
電腦與通訊工程所
91
A Study on Data Transmission by Power Line Student:Chyi-Taur Lin Advisors:Dr. Wei-Chih Hsu Department of Computer and Communication Engineering National Kaohsiung First University of Science and Technology 英文摘要 ABSTRACT This paper presents a characteristical measurement of power line to probe the possibility as a kind of communicational medium. The electric potential attenuation of power line against frequency has been measured by means of signal generator, frequency counter, and ocsilloscope. We wrote a program to measure the byte-loss rates of the server-to-client data transmission on the power lines with different lengths. Besides,we also investigated the influences of no-fuse breaker and the power with different phases on data transmission. In application, we constructed a PC-based power line communicator to control a programmable message sign. The alphanumerical characters were sent from the computer to the message sign for display. We also programmed a timing corrector to actively or passively transmit the date and the time of the server computer to the client computer for alignment. The experiments show that power line is capable of data transmission. The experimental results reveal that the electrical attenuation of power line varies with frequency. The transmission distance and the numbers of connected appliances also affect the loss rate of data transmission.
Chen, Tai-Chen, and 陳泰蓁. "Performance Optimization Under the Transmission Line Model." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/82510908347426425020.
Повний текст джерела國立交通大學
資訊科學系
89
Transmission line effects are very important for the timing estimation and optimization in high-performance circuits. Most previous works on transmission lines are based on relatively complicated models, resulting in higher time complexity. We present a simple, yet accurate formula for the delay computation under the lossless and lossy transmission line models. Extensive simulations with SPICE show that the formula has high fidelity, with an average error rate of within 6.85% (1.50%) for a lossy (lossless) transmission line. Based on this formula, we show the property that the minimum delay for a lossy transmission line with reflections occurs when the number of round trips equals one. Besides, we show that the delay (with the consideration of fringing capacitance) of a circuit path is a posynomial function (i.e., convex function) in wire and buffer sizes, implying that a local optimum is equal to the global optimum. Thus we can apply any efficient search algorithm, such as the well-known gradient search procedure, to compute the optimal wire and buffer sizes for timing optimization for a circuit path. Experimental results show that simultaneous wire and buffer sizing is very effective in minimizing the delay of circuit paths under the transmission line model.