A Methodology for the Assessment of Hvdc-xlpe Cable Insulation
نویسندگان
چکیده
The purpose of this work is to present and to discuss a methodology for the assessment of materials intended to HVDC-XLPE cables, particularly as regards the evaluation of the effects of material formulation on space charge accumulation within the insulation. Sample design, testing method and protocol and criteria used for the material evaluation are specifically considered. It will be shown through several examples that criteria such as the Field Enhancement Factor (FEF) and the space-averaged charge density (QM) are indeed sensitive to material formulation. The question of the representativeness of tests performed on flat specimens vs. model or full cables will be discussed.
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