Open AccessFeasibility study of embedded FBG thermal sensing use for monitoring electrical fault‐induced thermal excitation in random wound coils
Author(s) -
Mohammed Anees,
Djurović Siniša
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8108
Subject(s) - electromagnetic coil , thermal , fault (geology) , fiber bragg grating , fault detection and isolation , electrical conductor , emulation , materials science , electronic engineering , engineering , electrical engineering , actuator , optical fiber , telecommunications , geology , physics , seismology , meteorology , economic growth , economics
This paper reports an experimental feasibility study of the potential for using Fibre Bragg Grating (FBG) thermal sensing technology for electrical fault detection in random wound coils. The study is performed on prototype test coils housed in a purpose built steel core section. The FBG thermal sensors are embedded between copper conductors in multiple positions within the coil structure and in close proximity of the known hot spots of interest. The examined coils are designed to enable emulation of hot spots representative of those that would be expected at the outset of winding fault events. A series of experiments were separately conducted in order to characterise the potential of coil internal thermal stress monitoring to provide recognition of a developing winding fault. To this end, winding fault scenarios with different severity levels of inter‐turn fault are experimentally examined. The reported findings demonstrate the potential of the proposed in‐situ thermal sensing scheme to enable monitoring and recognition of coil internal thermal stress induced at various stages of emulated electrical fault.