access icon free Space charge distribution and leakage current pulses for contaminated glass insulator strings in power transmission lines

This study reports an investigation on space charge distribution and leakage current (LC) pulses of four units of glass insulators recently removed from service. Simulation works were conducted using finite element software and validated by laboratory experiments. The simulation and experimental results were found to be in good agreement when studying the space charge distribution pattern along the glass insulator string. It is evident that the LC waveform can be used to characterise the types of partial discharge according to their occurrence with respect to the AC supply. Thus, the proposed method is viable and reliable to be applied in an online measurement system.

Inspec keywords: power engineering computing; power transmission lines; leakage currents; insulator contamination; partial discharges; waveform analysis; finite element analysis; space charge; glass; power system measurement

Other keywords: finite element software; AC supply; laboratory experiments; online measurement system; contaminated glass insulator strings; partial discharge; LC waveform; space charge distribution pattern; LC pulses; leakage current pulses; power transmission lines

Subjects: Power line supports, insulators and connectors; Finite element analysis; Finite element analysis; Power system protection; Power engineering computing; Dielectric breakdown and discharges

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http://iet.metastore.ingenta.com/content/journals/10.1049/iet-gtd.2016.0793
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