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Sensors 2018, 18(9), 3167; https://doi.org/10.3390/s18093167

Design of Wideband GHz Electric Field Sensor Integrated with Optical Fiber Transmission Link for Electromagnetic Pulse Signal Measurement

State Key Lab of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
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Received: 16 July 2018 / Revised: 6 September 2018 / Accepted: 7 September 2018 / Published: 19 September 2018
(This article belongs to the Special Issue UHF and RF Sensor Technology for Partial Discharge Detection)
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Abstract

The detection of high frequency overvoltage and partial discharge is of great significance in evaluating the insulation condition of high-voltage power equipment. A wideband GHz electric field (E-field) sensor for electromagnetic pulse (EMP) signal measurement was proposed in this paper. An optical fiber transmission link was adopted in the design in order to implement high-voltage isolation and reduce electromagnetic interference during transmission. The designed sensor was mainly made up of a differential electric field (D-dot) antenna, transmitter, and receiver. The D-dot antenna was designed to detect high frequency E-field strength and generate a corresponding voltage signal, which was converted into an optical signal by the transmitter. The optical signal could be transmitted a large distance through an optical fiber without electromagnetic interference and changed back to a voltage signal again by a receiver. The design process of the sensor was introduced in detail, and experiments were performed using a gigahertz transverse electromagnetic (GTEM) cell and an EMP simulator to verify it. The results indicated that the designed sensor had a good performance besides an expectable delay due to the optional amplifier. View Full-Text
Keywords: EMP measurement; E-Field sensor; optical fiber transmission link; D-dot antenna; transient overvoltage; partial discharge EMP measurement; E-Field sensor; optical fiber transmission link; D-dot antenna; transient overvoltage; partial discharge
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Zhang, G.; Li, W.; Qi, L.; Liu, J.; Song, Z.; Wang, J. Design of Wideband GHz Electric Field Sensor Integrated with Optical Fiber Transmission Link for Electromagnetic Pulse Signal Measurement. Sensors 2018, 18, 3167.

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