Evaluation of a PD measuring system for repetitive steep voltage waveforms
作者： Elisabeth Lindell , Tord Bengtsson , Jorgen Blennow , Stanislaw Gubanski
DOI: 10.1109/TDEI.2011.5704516
关键词: Voltage divider 、 Acoustics 、 Voltage 、 Waveform 、 Capacitive sensing 、 Electronic engineering 、 Capacitance 、 Voltage drop 、 High voltage 、 Materials science 、 Rise time
摘要: Measurements of partial discharges (PDs) at high frequency voltages is important but not a straightforward task. In this paper PD measuring system developed for use repetitive, steep voltage waveforms presented, which based on electrical detection using capacitive decoupling the signals. The utilizes only low order filter and allows presence significant remnants applied in signal used detection. Analytical calculations that estimate reachable sensitivity method are an example with test object 100 pF capacitance, range 1 - 10 pC/kV μs rise time was obtained. Further, transfer function has been measured reconstruction across object, latter consisting both square-like drops due to PDs. This attractive possibility since can be recalculated from same as addition, drop could provide information about processes, provided sampling enough.
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