The role of power quality in electrical treeing of epoxy resin

The impact of power network changes on one ageing mechanism in one simple insulation system is considered. The effects of non-power frequency events on electrical treeing in epoxy resins are critically reviewed. These non-power frequency events include 3^rd, 5^th and 7^th odd harmonics and various impulses superposed upon the power frequency. A framework under development is tailored for the stochastic modeling and assessment of electrical treeing, emphasizing the influence of electrical stress factors related to power quality. The impact of network changes on ageing of insulation through electrical trees is discussed in the context of this framework.