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One of the major problems regarding the development of HVDC cables is space charge build-up within the insulation of the cable which is nowadays mostly made with polymeric materials. The objective of this paper is to evaluate the influence of temperature gradient on space charge accumulation and electric field distribution in model medium voltage cables (MV-HVDC). These charge/field distributions are estimated by direct measurement or modelled from the temperature and field dependencies of material conductivity. Differences between model and measurement are discussed.
HVDC power cables, space charge, electrical conductivity, stress inversion, crosslinked polyethylene, extruded insulation
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