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Abdul Madhar, S. (author), Wenger, Philipp (author)Partial Discharges (PD) have long been studied under AC field stress and are widely accepted as a good indicator of component health. However, the advent of HVDC brought new challenges, as the pre-existing knowledge in the area of PD is not applicable to DC. The discharge behavior has been found to be erratic and there is no plausible evidence...conference paper 2019
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Kumari, Sweta (author)Cable terminations are essential for connecting a cable to a piece of equipment such as a circuit breaker, transformer, motor, etc. Proper terminations are of great importance in order to provide faultless cable systems. Improper terminations could result in overheating, partial discharges, eventual breakdown, flashover and breakdown in the...master thesis 2018
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Mier Escurra, Christian (author)Detection of partial discharge (PD) in any high voltage equipment is of great importance to improve the reliability of the device and the power system. Characteristics of PDs, such as: rate of occurrence, magnitude, location and the type; gives information of the assets that must be considered. Nowadays, there are many different methods for...master thesis 2018
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Mor, A. R. (author), Castro Heredia, L.C. (author), Muñoz Muñoz, F.A. (author)This paper presents a novel measuring system for partial discharge (PD) measurements in Gas Insulated Systems (GIS) using high frequency current transformers (HFCT). The system is based on the measurement of the induced PD currents in the GIS enclosure. In opposition to the existing antenna technologies that measure the radiated energy in the...journal article 2018
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Mor, A. R. (author), Castro Heredia, L.C. (author), Harmsen, D.A. (author), Muñoz Muñoz, F.A. (author)Partial discharge (PD) measurements are an effective tool for insulation assessment of high-voltage (HV) equipment widely used in both HV laboratories and in field tests. This paper presents the design of a test platform for electrical detection of partial discharges that contribute to the understanding of the phenomena. The test set-up...journal article 2018
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Joshi, Ayush (author)Partial Discharges(PD) are commonly produced in defects within the insulation systems of high voltage equipment. These discharges are typically nanosecond current pulses in the amplitude range of milli-amperes. A long term exposure of the insulation system to these partial discharges accelerate the aging mechanisms that eventually lead to the...master thesis 2017
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Shekhar, A. (author), Feng, Xianyong (author), Gattozzi, Angelo (author), Hebner, Robert E. (author), Wardell, Douglas (author), Strank, Shannon (author), Mor, A. R. (author), Ramirez Elizondo, L.M. (author), Bauer, P. (author)A scientific consensus is emerging on the benefits of direct current (DC) distribution in medium voltage (MV) power systems of ships and cities. At least 50% space savings and increased power transfer capacity are estimated with enhanced voltage DC operation of electric cables. The goal of this research is to contribute to developing the...journal article 2017
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Abdul Madhar, Saliha (author)The phenomenon of partial discharge has been long studied in various power components and in recent times, it has been agreed that the occurrence of such discharges can be considered as a vital parameter of component health. Partial discharges in power cables is a pervasive phenomenon that over time may lead to...master thesis 2017
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Soto Martinez, Miguel (author)To enable the next generation subsea boosting and processing facilities, high power electrical connectors are strongly needed and considered one of the most critical components of the system. <br/>Electrical tree growth is a precursor to electrical breakdown in high voltage insulation materials. Therefore, the study of the tree growth dependency...master thesis 2017
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Mor, A. R. (author), Castro Heredia, L.C. (author), Muñoz, F. A. (author)Clustering techniques are of main interest for separation of partial discharge (PD) sources. The separation is achieved if it is possible to extract from the PD pulses specific information related to the source. In this sense, this paper explores the capability of fundamental quantities derived from PD current pulses such as the peak amplitude...journal article 2017
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Mor, A. R. (author), Castro Heredia, L.C. (author), Muñoz, F. A. (author)The acquisition parameters of an unconventional Partial Discharge (PD) measuring system affect the way the PD pulses are recorded and in turn, the results of the data processing. The noise based on the oscilloscope's vertical resolution is a feature of the sampled signal that is always present when a digital acquisition system is used. In PD...journal article 2017
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Karhade, P.P. (author)Standing time, prior to testing, is a necessary part of the oil-filled transformer manufacturing process and its duration is design dependent. Caution on part of the manufacturer to avoid failure of expensive transformers leads to the overestimation of standing time, consequently impacting annual production. Thus, a need for optimizing (reducing...master thesis 2016
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Kumar, S. (author)A large power transformer, is often, a custom designed equipment that entails a complex and capital intensive manufacturing process. It is an integral part of the power system and the cost of failure during service can be significant. Due to its importance in the power system, transformers should perform reliably under the conditions for which...master thesis 2016
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Harmsen, D. (author)Design of a Partial Discharge Test Platform author: Daniel Harmsen thesis advisor (mentor): Dr. Armando Rodrigo Mor abstract: Partial discharge (PD) measurements are an effective tool for insulation diagnostics and assessment. Therefore, a good understanding of these PD measurements is an essential part of an electrical engineer’s background...master thesis 2016
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Palmans, J.A. (author)With the current state of power electronic conversion operating at Direct Current (DC) can in some cases be more efficient than ordinary Alternating Current (AC). DC voltage energy transmission and distribution is, thus, playing an increasingly important role. The continuity of the electrical energy supply is essential for a well-functioning...master thesis 2015
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Jin, H. (author)In many applications of high voltage engineering, electrical and thermal stresses increase due to an ongoing decrease of product dimensions. In particular, the electrical industry is interested in applying nanofluids in transformers to be able to decrease transformer size and weight. The requirement for nanofluids is to enhance the electrical...doctoral thesis 2015
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Blufpand, S.Y. (author)The thesis consists of 7 chapters. The first chapter will explain the background, motivations and the general overview of the thesis. Chapter 2 is a literature review describing the physics behind the creation of PDs. The conditions necessary for the occurrence of PDs are covered in addition to an analysis of the different types of PD in GIS...master thesis 2014
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Van Veen, L.W. (author)Nowadays there are many partial discharge (PD) measurement systems on the market. There are systems that measure according to the IEC60270 standard (conventional measurement) and systems that don’t, the so called ‘’unconventional measurement systems’’. For PD measurement in power cables, measurement according to the standard has some...master thesis 2014
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Piccin, R. (author)Nowadays, Gas Insulated Substations (GIS) are vital nodes of the Transmission Network due to their compact dimensions permitted by the use of SF6 as insulating medium and the high reliability guaranteed. Nonetheless, the strictly requirements of safety in operation and continuous power supply catalyse the attention to improve the reliability and...master thesis 2013
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Kanas, V. (author)During the last 50 years electricity demand has significantly increased. Large amounts of electricity are transported from the generation to the consumption sites. Overhead lines or underground cables are used to transport the required energy. High voltage levels are used to reduce the transmission losses. Power transformers are responsible for...master thesis 2013