Optimization of UHF Hilbert Antenna for Partial Discharge Detection of Transformers

Author

Jian Li ; Tianyan Jiang ; Caisheng Wang ; Changkui Cheng

Author_Institution

State Key Lab. of Power Transm. Equip. & Syst. & New Technol., Chongqing Univ., Chongqing, China

Volume

60

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

2536

Lastpage

2540

Abstract

Partial discharge (PD) online monitoring is an effective tool of inspecting insulation defects and identifying potential faults in power transformers. Ultra-high-frequency (UHF) approaches have caught increasing attention recently and been considered as a promising technology for online monitoring PD signals. The size of a UHF sensor for PD online monitoring of transformer is a critical factor for practical installation inside transformer. This communication presents a compact fourth order UHF Hilbert fractal antenna with desired performance and suitable size for easy installation. Actual PD experiments were carried out for four typical artificial insulation defect models while the antenna was used for PD measurements. The experimental results show that the proposed Hilbert fractal antenna is suitable and effective for UHF online monitoring of PDs in transformers.

Keywords

UHF antennas; fractal antennas; inspection; partial discharges; power transformers; PD measurements; PD online monitoring; UHF Hilbert antenna optimization; UHF sensor; artificial insulation defect models; compact fourth order UHF Hilbert fractal antenna; insulation defects inspection; online monitoring PD signals; partial discharge detection; power transformers; ultra-high-frequency; Discharges; Fractal antennas; Oil insulation; Partial discharges; Power transformer insulation; UHF antennas; Hilbert fractal antenna; partial discharge; transformer; ultra-high-frequency detection;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2012.2189929

Filename

6165337