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Institution

Hydro-Québec

GovernmentMontreal, Quebec, Canada
About: Hydro-Québec is a government organization based out in Montreal, Quebec, Canada. It is known for research contribution in the topics: Electric power system & Dielectric. The organization has 2596 authors who have published 4433 publications receiving 100878 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors present a new method in the EMTP for initializing time-domain simulations based on frequency domain steady-state calculations including harmonics from nonlinear branch functions.
Abstract: Nonlinear branches, such as saturable reactors, can generate harmonics and consequently increase the EMTP time-domain simulation time before the actual distorted steady-state is reached. This is an important initialization problem for transient analysis studies performed in steady-state operating conditions. This paper presents the implementation of a new method in the EMTP for initializing time-domain simulations. It is based on frequency domain steady-state calculations including harmonics from nonlinear branch functions. >

32 citations

Journal ArticleDOI
Paul Héroux1
TL;DR: From a mobile unit, 60-Hz electric and magnetic fields generated by Hydro-Québec's distribution network were measured and were major contributors to theElectric and magnetic environments.
Abstract: From a mobile unit, 60-Hz electric and magnetic fields generated by Hydro-Quebec's distribution network were measured. Nine runs, representative of various human environments, were investigated. Typical values were 32 V/m and 0.16 microT. The electrical distribution networks investigated were major contributors to the electric and magnetic environments.

32 citations

Patent
15 Apr 2005
TL;DR: In this paper, a remote-controlled vehicle is designed to be mounted on a support and capable of clearing an obstacle on the support, which consists of first and second mobile frames.
Abstract: The invention concerns a remote-controlled vehicle designed to be mounted on a support and capable of clearing an obstacle on the support. The vehicle comprises first and second mobile frames. At least one articulated arm is mounted mobile on the first frame and a wheel is mounted on the articulated arm to maintain the vehicle on the support. A fastening means co-operates with the wheel and is adapted to retain the wheel on the support. At least one temporary support arm is mounted mobile on the second frame. The temporary support arm comprises retaining means for maintaining the vehicle on the support. The vehicle comprises motor means connected between the frames and the arms for moving same with respect to one another so as to clear an obstacle encountered on the support.

32 citations

Journal ArticleDOI
TL;DR: In this paper, momentum transfer and velocity diffusion of electrons periodically interacting with a coherent longitudinal wavepacket is considered and the resonance overlap criterion is applied to establish the threshold for intrinsic stochasticity.

32 citations

Journal ArticleDOI
TL;DR: In this paper, a comparative study of two types of transformer solid insulation: standard Kraft and thermally upgraded Kraft papers was presented, where the paper samples were impregnated with two different fluids, namely a synthetic dielectric ester fluid, Midel 7131, and a synthesized mineral oil, Luminol Tri.
Abstract: This article presents a comparative study of two types of transformer solid insulation: standard Kraft and thermally upgraded Kraft papers. The paper samples were impregnated with two different fluids, namely a synthetic dielectric ester fluid, Midel 7131, and a synthesized mineral oil, Luminol Tri. The impregnated papers were submitted to, accelerated aging at 150°C, temperature higher than the temperatures found inside transformers, for extended periods. The results show that for the first hours of aging, the cellulose depolymerization was similar for all the four studied cases. At a specific point, the paper samples aged in the ester fluid exhibited a lower depolymerization exceeding the 8000 hours of aging without reaching the levelling-off degree of polymerization (LODP). A similar trend was observed through the decrease of mechanical properties of papers in the ester-based oil. However, the difference in performance of both fluids was amplified due to the temperature used; at lower temperatures the difference should be smaller. Additionally, a relationship between the degree of polymerization and the mechanical properties accessed by the tensile testing was obtained regardless of the type of paper or oil. The total acidity in the ester fluid was higher than in mineral oil. Methanol, a chemical marker that is closely linked to the rupture of 1,4-s-glycosidic bonds of cellulose, showed a partial sensitivity to the cellulose aging in the ester fluid. Furan (C 4 H 4 O) content was monitored during the aging and its concentration was found to be sensitive to the depolymerization along with the decrease in the mechanical properties of cellulose papers regardless of the type of paper. More importantly, its concentration was found to be dependent on the type of oil. More investigations are needed to further confirm the importance of furan as an indirect indicator of the mechanical performance along with its correlation with the depolymerization of paper aged in ester fluids.

32 citations


Authors

Showing all 2603 results

NameH-indexPapersCitations
John B. Goodenough1511064113741
Mark Sutton128100978703
Pierre Legendre9836682995
Jackie Y. Ying8958735694
Karim Zaghib6953316785
Geza Joos6751415880
M. V. Reddy6625415772
Kamal Al-Haddad6182821017
Jean-Pol Dodelet5916418473
Taha B. M. J. Ouarda5834912230
Michael R. Wertheimer5432011003
Richard Martin5433911465
Michel Armand5415244873
Marc Lucotte501698088
Abdelbast Guerfi492156739
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20231
202256
2021115
2020173
2019162
2018156