Study of relaxation mechanism on a power network

Author

Yu, X.Z. ; Birlasekaran, S. ; Choi, S.S. ; Lian, W.K. ; Shih, C.L.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

3

fYear

2000

fDate

2000

Firstpage

1383

Abstract

An attempt was made to study the on-site relaxation mechanism of equipment in a power network consisting of a 30 MVA alternator, a transformer, underground cable and 66 kV SF₆ gas insulated switchgear (GIS). The objective of the study is to obtain a signature of the aging of the equipment. Toward this end, measurements were carried out before and after the treatment of the transformer oil, with and without the alternator connected to the transformer. Field difficulties encountered and observation from the tests are reported. The measured data was then used to identify the parameters of the extended Debye model. Furthermore, the validity of the frequency response analysis (FRA) on detecting transformer faults was investigated. It shows that the technique is very sensitive to fault occurrence and much information can be extracted from the test results

Keywords

alternators; gas insulated switchgear; machine testing; power cable testing; power system measurement; power transformer testing; switchgear testing; underground cables; 30 MVA; 66 kV; GIS; SF₆ gas insulated switchgear; alternator; extended Debye model; frequency response analysis; power network relaxation mechanism study; transformer; transformer fault detection; transformer oil; underground cable; Aging; Alternators; Frequency response; Gas insulation; Geographic Information Systems; Oil insulation; Power transformer insulation; Switchgear; Testing; US Department of Transportation;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology, 2000. Proceedings. PowerCon 2000. International Conference on

Conference_Location

Perth, WA

Print_ISBN

0-7803-6338-8

Type

conf

DOI

10.1109/ICPST.2000.898171

Filename

898171