Showing papers by "Hydro-Québec published in 1969"
01 Nov 1969
TL;DR: In this article, the discharge rate and energy loss behavior in helium between metallic-electrodes at atmospheric pressure were investigated and it was found that the power loss arising from both spark and pseudo-glow discharges exhibits a linear variation over the lower apparent voltages with a saturation effect manifesting itself at the higher values.
Abstract: Experimental data are presented on the discharge rate and energy loss behaviour in helium between metallic-electrodes at atmospheric pressure. For gaps less than 0.15 mm, the discharge rate is found to be a linear function of the apparent voltage; however, with gaps exceeding 2.5 mm irregular step-like variations in the discharge rate occur. A method is developed for determining the heat energy relased by single spark discharges. It is found that the power loss arising from both spark and pseudo-glow discharges exhibits a linear variation over the lower apparent voltages, with a saturation effect manifesting itself at the higher values.
38 citations
Patent•
20 Feb 19699 citations
Patent•
06 May 1969TL;DR: In this paper, a high voltage generator for the socalled synthetic testing of circuit interrupters operating at high and very high voltages is described. But this generator is not suitable for the case of current injection.
Abstract: The application relates to a high voltage generator for the socalled synthetic testing of circuit interrupters operating at high and very high voltages, such generator being used more particularly in a testing circuit of the current injection type, and capable of providing successively an injection current waveform and a transient recovery voltage waveform. The generator comprises an injection branch providing the injection current waveform and a regulating branch providing the transient recovery voltage waveform. The injection branch is formed by at least two groups of elements, each comprising a capacitance, an inductance and a spark gap in series forming a unit, and by a switching system for interconnecting the units in series, or in parallel, or in a combined series-parallel connection. The regulating branch is formed by at least two groups of elements, each comprising at least one capacitance and at least one resistor forming a unit, and by a switching system for interconnecting the units in series, or in parallel, or in a combined series-parallel connection.
8 citations
TL;DR: In this paper, a two-converter station can be equipped with a conventional converter operating in parallel on the ac side and, ideally, the station capacitive reactance can be reduced to that required for satisfactory harmonic filtering, by reversing the valve-to-valve voltage during the commutation period.
Abstract: The conventional converter consumes reactive power by virtue of the lagging power factor inherent in normal operation. Operation at leading power factor requires commutation in the region (?+ u) > ?. This can be achieved through artificial commutation by reversing the valve-to-valve voltage during the commutation period. In a two-converter station the vars so generated can be supplied to a conventional converter operating in parallel on the ac side and, ideally, the station capacitive reactance can be reduced to that required for satisfactory harmonic filtering.
5 citations
TL;DR: A brief description of the techniques and methods used for the construction of the prestressed concrete containment building for the Gentilly Nuclear Power Station is given in this paper, which consists of a base slab, a circular wall, a ring beam and a dome.
3 citations