Search for dissertations about: "electrical ageing"
Showing result 1 - 5 of 54 swedish dissertations containing the words electrical ageing.
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1. Mechanisms of Electrical Ageing of Oilimpregnated Paper due to Partial Discharges
Abstract : In this thesis, partial discharge (PD) phenomenon in oil-impregnated paper (OIP) is investigated under accelerated electrical stress. The thesis is mainly focused on the characteristic of PD activity and the influence it has on the insulation properties of OIP. READ MORE
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2. On reliability modelling of ageing equipment in electric power systems with regard to the effect of maintenance
Abstract : Power system maintenance optimisation involves obtaining the minimum total costs, including preventive and corrective maintenance costs and the cost of failures for both supplier and customer. To calculate the cost of failure, information is needed about the equipment reliability characteristics. READ MORE
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3. Ageing and characterisation of semiconducting glazes
Abstract : .... READ MORE
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4. Experimental investigations of ageing of commercial BEV Li-ion batteries
Abstract : The rapid development of lithium-ion batteries has enabled changes in widespread applications ranging from portable electronics to electric vehicles and large scale grid energy storage. However, battery ageing remain a challenge in all these applications, and this thesis seeks to contribute to the understanding of Li-ion battery degradation. READ MORE
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5. Influence of Ageing on Material Properties at Interfaces in Composite Insulators
Abstract : High quality of internal interfaces in composite insulators for high voltage applications is necessary for securing durability of their functionality. Weak macroscopic interfaces between the glass fibre reinforced (FRP) epoxy core and the silicone rubber (SIR) housing, such as spots with reduced bonding or a loss of the adhesion as well as presence of foreign contaminants, can appear to have an accelerating effect on the evolution of ageing processes, though it may take years before the first signs of processes endangering the insulator function appear. READ MORE