Investigation of Space Charge Profile on the Flashover Characteristics of Fiberglass Reinforced Plastic (FRP) Tools Under HVDC Conditions
September 19, 2017
Holiday Inn South, 1330 Pembina Highway, Winnipeg
In high voltage direct current (HVDC) electric power systems, live-line maintenance methods, using fibreglass reinforced plastic (FRP) tools, are being applied to enhance their reliability and avoid costly outages. The effects of direct current (DC) space charges are not well understood or accounted for in live-line working standards. Surface charge is generated by a ring of needles, pre-stressing and wiping. Surface potentials are measured using a vibrating Kelvin probe and converted to charge densities using a probe response matrix. Surface charging characteristics of FRP are compared to silicone rubber (SIR) and wood hot stick insulator samples. The effects on flashover voltage due to the presence of surface charge are investigated by applying both polarities of voltage when charges pre-existed on the surface. It is discovered that the presence of surface charge does impact the flashover voltage of FRP insulator samples. Mitigation methods are investigated and discussed.
Jeff Laninga is an Electrical Engineer and has been with Manitoba Hydro for 18 years. He has spent the last eight years in the Live Line Procedures section. He is responsible for Live Line Methods from 24 kV to 500 kV AC/DC, Grounding and Equipotential Bonding, Arc Flash and the development of specialized tools for Line Maintenance.
Jeff has successfully defended his Masters of Science thesis at the University of Manitoba and will graduate this October. He is married and the father of four children and during his evenings and weekends chauffeurs them around to soccer, gymnastics and dance
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