TRV under transformer limited fault condition and frequency-dependent transformer model

Author

Koshizuka, Tadashi ; Nakamoto, Tetsuya ; Haginomori, Eiichi ; Thein, Myomin ; Toda, Hiroaki ; Hikita, Masayuki ; Ikeda, Hisatoshi

Author_Institution

Toshiba Co., Kawasaki, Japan

fYear

2011

Firstpage

1

Lastpage

7

Abstract

The TRV amplitude factors of 4kVA and 300kVA transformers under transformer limited fault conditions were measured. The measured factors were 1.4 and were lower than the IEC standard. The frequency response of the transformer impedance was investigated using a frequency response analysis (FRA). FRA measurement graphs showed that the short-circuit inductance value of test transformers gradually decreases along with frequency. From this result, a frequency dependent transformer model was constructed. Simulated frequency response of transformer impedance was in good agreement with measured values. Simulated amplitude factor using frequency-dependent transformer model was 1.5 and is good agreement with measured values.

Keywords

IEC standards; fault diagnosis; frequency response; power transformers; short-circuit currents; FRA measurement graphs; IEC standard; TRV; apparent power 300 kVA; apparent power 4 kVA; fault condition; frequency response; frequency response analysis; frequency-dependent transformer model; short-circuit inductance value; transformer impedance; Current measurement; Frequency measurement; Frequency response; Impedance; Impedance measurement; Inductance; Power transformers; frequency response analysis; transformer equivalent circuit; transformer limited fault; transient recovery voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting, 2011 IEEE

Conference_Location

San Diego, CA

ISSN

1944-9925

Print_ISBN

978-1-4577-1000-1

Electronic_ISBN

1944-9925

Type

conf

DOI

10.1109/PES.2011.6039099

Filename

6039099