Generation of Reproducible Reference Insulation Defects in Experimental Tests Cells for Controlled PD monitoring

Álvarez, F.; Garnacho, Fernando; Ramirez, A. R.; Arcones, Eduardo; García, Pedro López; Vera, Carlos

doi:10.1109/ichve.2018.8641856

Cited by 2 publications

(1 citation statement)

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“…In general, PD impulses are characterized as short risetime narrow pulses with varying frequency spectrums, mostly under tens to hundreds of MHz, but some extending into the UHFregime (dependent on defect type, test object, applied voltage stress, measurement and acquisition techniques, etc.) [ [25].…”

Section: Pd Applicationsmentioning

confidence: 99%

High-Frequency Current Transformer Design and Implementation Considerations for Wideband Partial Discharge Applications

Klüss

Elg

Wingqvist

2021

IEEE Trans. Instrum. Meas.

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High-frequency current transformers are popular noninvasive inductive wideband sensors. Despite simplicity in design and operational principle, implementation of such sensors for partial discharge applications requires careful consideration, particularly in the higher frequency range where traveling wave attenuation and distortion is relevant. First, the role of design variables, including core materials, winding design, and shielding practices on sensor sensitivity and frequency characteristics (transfer impedance) are presented. Next, the suitability of the constructed sensors for partial discharge applications is assessed. The designed wideband sensors are suitable for laboratory applications with standard measurement circuits and controlled conditions. The low-level magnitude and frequency spectrum of the discharge pulses hinders signal integrity in relation to the placement of the sensors within the measurement circuit, signal amplification, and pulse repetition rate (pulse resolution). To enable most stringent detection levels under 1 pC, efforts are needed in distortionless amplifier design and interference mitigation.Index Terms-current transformers, frequency-domain analysis, high-voltage techniques, partial discharge measurement, time-domain analysis.

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Section: Pd Applicationsmentioning

confidence: 99%