An on-line monitoring method for winding deformation of power transformers

Author

Xing-ping Liu ; Min-you Chen

Author_Institution

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

fYear

2013

fDate

19-21 June 2013

Firstpage

255

Lastpage

260

Abstract

A novel method for on-line monitoring winding deformation of transformers is proposed. Short-circuit reactance (SCR) of transformers in service is calculated through online measurement of the voltage and current at primary side and secondary side with different loads, which could reflect the deformation of transformer windings. This method does not need zeroing in no-load and is not affected by the excitation current and variation of prime side current of distribution transformer in service. The method has been used in distribution transformers (DT) of different capacity whose inductances changed with different variations for imitating different windings deformation in DT. Simulation results verified the feasibility and effectiveness of the proposed method for on-line monitoring of windings deformation in DT.

Keywords

electric current measurement; power transformers; transformer windings; voltage measurement; current online measurement; distribution transformers; excitation current; on-line monitoring method; power transformer winding deformation; prime side current; secondary side; transformer SCR; transformer short-circuit reactance; voltage online measurement; Current measurement; Measurement uncertainty; Phase measurement; Power transformers; Thyristors; Voltage measurement; Windings; distribution transformer; on-line monitoring; short-circuit reactance; winding deformation;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics and Applications (ICIEA), 2013 8th IEEE Conference on

Conference_Location

Melbourne, VIC

Print_ISBN

978-1-4673-6320-4

Type

conf

DOI

10.1109/ICIEA.2013.6566376

Filename

6566376