Comparison of capacitive and inductive sensors designed for partial discharges measurements in electrical power apparatus

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Abstract

In the paper results of simultaneously conducted measurements achieved using capacitive and inductive sensors are presented according to different PD model sources immersed in a mineral transformer insulation oil. All measurements are preceded under laboratory conditions using typical measurement set up commonly applied for on-site PD detection: measuring impedance and capacitor and high frequency current transformer (HFCT) are used respectively. Measuring frequency and voltage level influence as well as phase resolved PD patterns analysis are investigated in the research. Various fundamental PD signal descriptors assigned for selected frequencies are also proposed and compared for chosen sensors. The main purpose of the presented research is to compare PD measurement results achieved using selected type of sensors during laboratory measurements and to point the best application areas in fields of PD detection in high voltage apparatus under normal operating conditions. Furthermore a proper measurement results interpretation coming from different sensors as well as measurement conducting problems and achieved patterns disparities are also discussed in the paper.

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APA

Kunicki, M. (2017). Comparison of capacitive and inductive sensors designed for partial discharges measurements in electrical power apparatus. In E3S Web of Conferences (Vol. 19). EDP Sciences. https://doi.org/10.1051/e3sconf/20171901035

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