PARTIAL DISCHARGE AGING OF POLYMERIC INSULATION FOIL UNDER HARMONIC DISTORTED VOLTAGE STRESS

Abstract

The partial discharge aging of polyethylene terephthalate (PET) foil with permanent surface discharge stress is

investigated using different harmonic distorted voltage waveforms. Distorted voltage waveforms alter the partial

discharge behavior of insulation arrangements by affecting characteristics such as the apparent charge and

repetition rate. Consequentially, an influence of the harmonic distorted voltages on the partial discharge aging of

insulation materials is expected. The goal of this contribution is to identify the influence of the different harmonic

voltage waveforms on the lifetime of the PET foil when constantly exposed to surface discharges.