Searched for: author%3A%22Ross%2C+Robert%22
(1 - 19 of 19)
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Wikkerink, D.P. (author), Gagic, Mladen (author), Mor, A. R. (author), Polinder, H. (author), Ross, Robert (author)
A degaussing system can be used to reduce the detectability of the magnetic signature of a ship. Commonly, a degaussing system consists of a set of onboard copper coils that produce a magnetic field to compensate for the magnetic signature. High-temperature superconductive degaussing coils are considered an alternative to copper degaussing...
journal article 2024
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Chen, Y. (author), Castro Heredia, L.C. (author), Smit, J.J. (author), Ghaffarian Niasar, M. (author), Ross, Robert (author)
Partial discharge (PD) detection is a standardized technique to qualify the insulation condition in power equipment. The main purpose of the article is to evaluate the performance of an extra high-sensitivity adapted giant magneto-resistive (xMR) sensor for non-contacting PD detection. First, compensation and signal conditioning circuits of...
journal article 2023
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Chen, Y. (author), Castro Heredia, L.C. (author), Smit, J.J. (author), Ghaffarian Niasar, M. (author), Ross, Robert (author)
Partial discharges (PD) detection is an effective diagnostic method to assess the insulation condition of electrical power equipment in the high-voltage laboratory or field tests. This paper presents a non-contacting PD detection method for power equipment. The method is based on an extra high-sensitivity adapted giant magneto-resistive (xMR)...
journal article 2023
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Ross, Robert (author), Ypma, P.A.C. (author), Koopmans, Gerben (author)
The here reported work is part of a project on supporting grid resilience by asset management techniques. The present work focuses on support of decision-making after a few failures occurred that may be the start of many more. Methods are reviewed and new algorithms developed where the present IEEE/IEC standard does not provide. Two cases of...
conference paper 2022
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Wikkerink, D.P. (author), Mor, A. R. (author), Polinder, H. (author), Ross, Robert (author)
Ships can avoid to be detected by magnetic mines by reducing their magnetic signature with degaussing coils. Degaussing currents are provided by switched mode power supplies which impose a current ripple on top of the degaussing current. The ripple might be visible in the magnetic signature which would increase the detectability of the ship. A...
journal article 2022
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Basu, Devayan (author), Gholizad, B. (author), Ross, Robert (author), Gargari, Shima Mousavi (author)
The time-to-failure for oil-impregnated paper (OIP) insulation is governed by two primary aging mechanisms: electrical and thermal. The electrical life can be represented as an Inverse Power Law, where lifetime is inversely proportional to applied electric field. The process of thermal aging on the other hand is established by Arrhenius Law,...
conference paper 2022
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Wikkerink, D.P. (author), Mor, A. R. (author), Polinder, H. (author), Ross, Robert (author)
Detection of the magnetic signature of ships can be avoided by using a degaussing system; a set of on-board copper coils that compensates for the magnetic signature. High temperature superconductors (HTS) are currently investigated as a replacement for copper degaussing coils. By using HTS, we have to deal with higher currents and therefore...
journal article 2022
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Basu, D. (author), Gholizad, B. (author), Ross, Robert (author), Gargari, Shima Mousavi (author)
Elevated thermal stress-related aging is significant on the oil-impregnated paper (OIP) used as insulation in high-pressure gas cables (HPGCs). The aim of this article is to develop a cheap alternative for lab dielectric measuring and characterizing temperature-dependent parameters for OIP. First, this article derives the operating thermal...
journal article 2022
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Ross, Robert (author), Koopmans, Gerben (author)
Testing materials and devices for a specific failure mechanism usually yields a characteristic distribution of failure times. However, failure of power electronics (PE) can be due to a manifold of mechanisms. Even in a single PE device multiple failure processes may compete. For instance, modules may contain various components that fail...
book chapter 2022
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Abdul Madhar, S. (author), Mor, A. R. (author), Mraz, Petr (author), Ross, Robert (author)
This paper presents the investigation on surface discharge behavior of various dielectric samples under DC. It sequentially develops the knowledge base for the study and analysis of the partial discharge (PD) defect with the goal of PD defect identification under DC. In order to facilitate this, the material properties of the dielectric are...
journal article 2021
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Ross, Robert (author), Ypma, P.A.C. (author), Koopmans, Gerben (author)
This paper discusses a method for data analysis of early failures that are typically due to defects from production and/or installation. The approach is based on Weighted Linear Regression and aims at estimating the next failure moment and the failure probability in an interval. As an additional goal, methods are intended to be suitable for...
conference paper 2021
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Iannarelli, A. (author), Ghaffarian Niasar, M. (author), Ross, Robert (author)
Dielectric elastomer actuators (DEAs) are a class of electrostatic actuators that have promising applications in fields like sensors, soft-robotics, microfluidics, and energy harvesting. The crucial points in the working principle of DEA are the application of high electric field and the use of compliant electrodes. These electrodes are...
journal article 2020
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Abdul Madhar, S. (author), Mraz, Petr (author), Mor, A. R. (author), Ross, Robert (author)
This paper presents several approaches to the analysis of partial discharge (PD) data. Three common defects namely corona, surface and floating electrode are studied with the goal of defect identification under DC stress conditions. One of the major concerns with DC-PD testing, is its non-repetitive/erratic pulse pattern. This paper, however,...
journal article 2020
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Abdul Madhar, S. (author), Mraz, Petr (author), Mor, A. R. (author), Ross, Robert (author)
Corona is one of the most common forms of partial discharge (PD) occurring in high voltage (HV) energy systems. The corona mechanism in air is not exclusive to the field of energy applications but has also been widely studied by physicists to theorize mechanisms of charge transfer during the different phases of gas discharge. The phases of the...
journal article 2020
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Wikkerink, D.P. (author), Hanse, Izak (author), Mor, A. R. (author), Polinder, H. (author), Ross, Robert (author)
Due to their permeability, merchant and naval vessels distort Earth’s magnetic field which leaves a magnetic signature. These anomalies in the magnetic field may be detected by mines leaving the vessel exposed. To avoid detection by magnetic sensors, the vessels magnetic signature can be reduced in several ways. One of them is degaussing: a...
conference paper 2020
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Abdul Madhar, S. (author), Mraz, Petr (author), Mor, A. R. (author), Ross, Robert (author)
Partial discharge is a prevalent phenomenon under high voltage (HV) where the discharge partially bridges the gap between two electrodes. At increasing voltage levels, physical dimensions and distances between the electrical parts become critical. Designing electrical components for such high voltages and planning of high voltage laboratories...
journal article 2019
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Iannarelli, A. (author), Ghaffarian Niasar, M. (author), Ross, Robert (author)
Soft insulators are the main component used in dielectric elastomer actuators (DEAs). It follows that dielectric properties like permittivity and dielectric strength of the insulator can strongly influence the maximum dynamic actuation performance of DEA devices. We observed an increasing breakdown voltage with increasing driving AC voltage...
journal article 2019
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Wikkerink, D.P. (author), Mor, A. R. (author), Polinder, H. (author), Ross, Robert (author)
In order to avoid detection by sea mines, the magnetic signature of merchant and naval vessels can be reduced by running a current through a set of on-board copper coils. This process is called degaussing. Studies have shown that the volume, weight and energy losses of a degaussing system can be reduced by replacing the copper coils with high...
conference paper 2019
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Ross, Robert (author), Gholizad, B. (author), Koopmans, Gerben (author), Mousavi Gargari, Shima (author), Smit, J.J. (author), Ghaffarian Niasar, M. (author), Meijer, Cees G. (author), Bucurenciu, Ana-Maria (author)
High current capability, good integration in urban area and zero external magnetic field are advantages of HTS cables that make them interesting for implementation in the Netherlands. So far experience with HTS cable projects is good, but still limited. Yet there is a need for a proper testing practice. Due to limited operational experience,...
conference paper 2017
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