Hydro-Québec

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.

LineScout power line robot: Characterization of a UTM-30LX LIDAR system for obstacle detection

Abstract: This paper presents the characterization of the Hokuyo UTM-30LX laser range finder applied to obstacle detection on power line conductors First, an overview section defines requirements and explains why the UTM-30LX was selected for this application Next, since there is no published characterization of this particular sensor's performance, a comprehensive set of experiments is described, both general tests and ones specific to the novel problem of scanning a power line conductor to detect where obstructions are present It is then explained how the LIDAR can be mounted on the LineScout power line robot and what algorithm is used to detect obstacles ahead Basic results obtained on a full-scale power line mock-up clearly demonstrate the potential of the approach

Environmental Effects of the Nelson River HVDC Transmission Lines-RI, An, Electric Field, Induced Voltage and Ion Current Distribution Tests

Abstract: The two Manitoba Hydro 895 km (556 mile) Nelson River dc lines were completed in 1971. Since that time, under various system voltages, radio interference and corona power loss have been measured on these lines and reported on (1) (2). This paper reports on the electrical environmental effect tests conducted in 1979 including coordinated measurements of radio interference, audible noise, electric field, induced voltage, and ion flow.

Experimental Investigation of the Hydraulic Erosion of Noncohesive Compacted Soils

Abstract: This paper presents the results of a laboratory investigation whose purpose was to evaluate the effects of compaction on the erodibility of cohesionless soils. By means of a recently developed flume experiment, sediment erosion rates and incipient motion, as a function of shear stress, average velocity, and dry density, have been determined for three compacted sand and gravel mixtures. A preliminary comparison of the incipient motion values shows that granular soils compacted at the Proctor optimum have a higher resistance to free surface flow erosion than those compacted at lower and higher densities. This leads one to infer that the Proctor optimum, generally used as a standard for construction, might also be an optimum for hydraulic resistance and stability. Additional comparison of the experimental data with two commonly used incipient motion criteria also suggests that Yang’s criterion is a better predictor of soil detachment than the Shields-Yalin criterion.