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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Development of procedures and equipment for after laying tests on HV extruded dielectric cables /

Jimenea, Arturo P. Unknown Date (has links)
Thesis (MEng in Electrical Engineering)--University of South Australia, 1996

Efficiency improvement techniques for high voltage capacitor carging [sic] methods

Islas, Michael E. January 2009 (has links)
Thesis (M.S.E.E.)--University of Central Florida, 2009. / Adviser: Issa Batarseh. Includes bibliographical references (p. 79).

Design of The Ohio State University high voltage laboratory /

Hermosillo Worley, Victor Federico, January 1987 (has links)
Thesis (M.S.)--Ohio State University, 1987. / Includes bibliographical references (leaves 224-228). Available online via OhioLINK's ETD Center

High-voltage measurement techniques

Halim, Armand Gregoire January 1980 (has links)
The Department of Electrical Engineering at the University of British Columbia acquired a high-voltage test set in 1979 for teaching and research purposes. To make this test set useful for experiments which undergraduate students can do themselves, various additions and modifications had to be made. This thesis describes these additions and modifications. First, a Faraday cage had to be constructed with interlocking safety circuits. Experiments were then developed to show basic high-voltage phenomena with AC voltage, with DC voltage, and with impulse voltages. Considerable modifications were required to eliminate noise in the impulse measuring system. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

High voltage direct current interruption

Rashid, Parvez. January 1979 (has links)
Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 125-127).

Modular dual active bridge DC-DC converter for HVDC applications

Harrye, Yasen Abdullahi January 2017 (has links)
The role of high/medium power bidirectional DC-DC converters in the next generation of multi-terminal high voltage DC transmission networks is to enable intercontinental bulk power transfer. This is encouraged by increased DC-DC converter functionalities such as DC voltage stepping/matching, DC line tapping, power flow regulation, bidirectional power flow control, and DC fault isolation. In this work, a bidirectional dual active bridge (DAB) DC-DC converter is selected to pursue such functionalities, due to its desirable features for use in high power applications. This includes galvanic isolation, fast power reversal, high power density, buck/boost operation, possibility of high stepping ratio of conversion and its inherent fault isolation capability without a need for a very fast controller. However, increased reactive power and reduced soft switching range are the main limitations of DAB for applications involving high voltage conversion ratios. Reactive power circulation increases the converter RMS current leading to an increase in conduction losses especially in high power applications. Therefore, a novel triple phase shift (TPS) control algorithm that minimises the total reactive power is proposed to enhance the performance of the DC-DC converter. The algorithm iteratively searches for TPS control variables that satisfy the desired active power flow while selecting the operating mode(s) with minimum reactive power consumption. In addition, a complete DAB converter behaviour under TPS control which has not been studied in the literature before is performed for both power flow directions. Steady state analysis is undertaken for each mode by computing exact expressions for modes power transfer and range (to characterise mode boundary) without fundamental frequency assumption. A new definition of reactive power consumption based on converter total inductance is proposed and a detailed constraint for zero voltage switching (ZVS) is also presented. Moreover, it is shown that all known DAB phase shift modulation techniques including conventional, dual and extended phase shift, represent special cases of TPS, therefore the presented analysis provides a generalised theory for all phase shift based modulation techniques. To scale the converter to higher power level, a modular DAB converter is implemented with a development of power sharing controllers that utilise TPS modulation scheme. The focus is to ensure stable operation of the DAB modules in both power flow directions in the presence parametric mismatches. The reactive power minimisation algorithm and a new DC fault management mechanism are embedded within the proposed controllers. Detailed simulation and experimentation are used to validate the proposed algorithm and power sharing controllers.

Development of 4H-SiC high voltage unipolar power switching devices

Alexandrov, Petre. January 2009 (has links)
Thesis (Ph. D.)--Rutgers University, 2009. / "Graduate Program in Electrical and Computer Engineering." Includes bibliographical references (p. 131-133).

Voltage profile of a shunt compensated EHV transmission line

Lazar, Joseph Yvan. January 1980 (has links)
No description available.

Effects of high voltage transmission lines on NDB performance

Ismail Ibrahim. January 1981 (has links)
Thesis (M.S.)--Ohio University, August, 1981. / Title from PDF t.p.

A high voltage piezoelectric transformer for active interrogation

Benwell, Andrew L., Kovaleski, Scott D. January 2009 (has links)
Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 23, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Scott D. Kovaleski. Vita. Includes bibliographical references.

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