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Silicone rubber insulators are widely used in the power grid. An accurate estimation of the insulator aging status is necessary for electric power safety. In this study, a novel unilateral nuclear magnetic resonance (NMR) method to quantify insulator aging status is proposed. Firstly, a unilateral NMR sensor was designed specifically for measuring the transverse relaxation time (T2) of insulators...
ZnO varistors have high nonlinearly which are widely utilized in protecting power systems and electronic devices against the dangerous over-voltages or surges. In this paper, the thermally stimulated current (TSC) characteristic and U-I characteristic performance of aging ZnO varistors had been investigated in different aging conditions(impulse current amplitude, impulse time). Based on the experimental...
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