TY - JOUR

T1 - Turret-Electrode Antenna for UHF PD Measurement in Power Transformers - Part I

T2 - Introduction and Design

AU - Jahangir, Hamid

AU - Akbari, Asghar

AU - Azirani, Mohammad Akbari

AU - Werle, Peter

AU - Szczechowski, Janusz

PY - 2020/12/14

Y1 - 2020/12/14

N2 - This contribution is the first part of a two-part series which deals with proposing a new type of UHF probe to overcome problems of UHF partial discharge (PD) measurement in power transformers. In the first part, the main obstacles of using the UHF technique in power transformers including problems of installation, unfeasibility of calibration, low sensitivity, etc. are addressed. Moreover, a new type of UHF sensor called the 'Turret-Electrode' antenna is presented to deal with the above obstacles. In the new antenna, the transformer turrets employed as the housing of open waveguide antenna (horn antenna with zero flare angle), while an electrode inside of the turret is designed to capture the electromagnetic (EM) waves produced by the PD signals inside of the transformer tank. The significant characteristics of the proposed antenna are investigated in detail and a prototype of the antenna is investigated via practical measurements. The results show the antenna parameters are quite appropriate for online PD measurement. The second part of the paper shows how the proposed antenna can resolve the problems pertaining to the UHF PD measurement in power transformers.

AB - This contribution is the first part of a two-part series which deals with proposing a new type of UHF probe to overcome problems of UHF partial discharge (PD) measurement in power transformers. In the first part, the main obstacles of using the UHF technique in power transformers including problems of installation, unfeasibility of calibration, low sensitivity, etc. are addressed. Moreover, a new type of UHF sensor called the 'Turret-Electrode' antenna is presented to deal with the above obstacles. In the new antenna, the transformer turrets employed as the housing of open waveguide antenna (horn antenna with zero flare angle), while an electrode inside of the turret is designed to capture the electromagnetic (EM) waves produced by the PD signals inside of the transformer tank. The significant characteristics of the proposed antenna are investigated in detail and a prototype of the antenna is investigated via practical measurements. The results show the antenna parameters are quite appropriate for online PD measurement. The second part of the paper shows how the proposed antenna can resolve the problems pertaining to the UHF PD measurement in power transformers.

KW - condition monitoring

KW - diagnosis

KW - electromagnetic (EM) wave propagation

KW - partial discharge (PD)

KW - power transformer

KW - turret-electrode antenna

KW - ultrahigh frequency (UHF) technique

UR - http://www.scopus.com/inward/record.url?scp=85098010688&partnerID=8YFLogxK

U2 - 10.1109/TDEI.2020.008874

DO - 10.1109/TDEI.2020.008874

M3 - Article

AN - SCOPUS:85098010688

VL - 27

SP - 2113

EP - 2121

JO - IEEE Transactions on Dielectrics and Electrical Insulation

JF - IEEE Transactions on Dielectrics and Electrical Insulation

SN - 1070-9878

IS - 6

M1 - 9293236

ER -