Using ferrite to improve directional sensing for pulse travelling in MV power cables with two inductive sensors

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Abstract

Inductive sensors are widely used for detection of high frequency signal, e.g. from partial discharge (PD) activity. A single inductive sensor, installed in a ring main unit (RMU) in a medium-voltage (MV) system, is not able to judge the direction of the signal origin. A method to determine its origin with two inductive sensors, proposed in earlier literature, employs a second sensor in the same RMU to determine signal propagation direction. This method can be extended for a recorded pattern, including reflections coming from both directions. This paper discusses a method to discriminate structures in a complete recorded pattern, originating from different sides. The method is tested on a 420m laboratory scale test set-up with two RMUs upon injected pulses. The main difficulty to extract the injected pulse from the recorded pattern, due to resonances caused by the RMU-components, could be relaxed by the use of ferrite material.
Original languageEnglish
Title of host publication18th International Symposium on High Voltage Engineering (ISH 2013), August 25-30 2013, Seoul
Place of PublicationSeoul
Pages2103-2108
Publication statusPublished - 2013
Eventconference; ISH 2013; 2013-08-25; 2013-08-30 -
Duration: 25 Aug 201330 Aug 2013

Conference

Conferenceconference; ISH 2013; 2013-08-25; 2013-08-30
Period25/08/1330/08/13
OtherISH 2013

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