This paper presents a magnetic loop antenna for partial discharge (PD) measurements on gas insulated systems (GIS). The antenna is based on a single shielded loop inserted in the dielectric window of a GIS that measures the PD currents propagating in TEM mode. The paper describes the relevant parameters of the antenna and the antenna performance in combination with a transimpedance amplifier. A calibration method for charge estimation is presented along with laboratory experiments with free moving particle, surface and corona discharges in SF6 test cells. The results show the suitability of the magnetic antenna for PD detection and the charge evaluation performance. Under laboratory conditions, the antenna sensitivity is in the order of 1 pC at a few meters from the PD source.

Original languageEnglish
Article number105514
Pages (from-to)1-6
Number of pages6
JournalInternational Journal of Electrical Power and Energy Systems
Volume115 (2020)
Publication statusE-pub ahead of print - 28 Aug 2019

    Research areas

  • Charge calibration, GIS, Magnetic loop antenna, Magnetic sensor, Partial discharge

ID: 56669734