Accurate modeling of core-type distribution transformers for electromagnetic transient studies

Author

Noda, Taku ; Nakamoto, Hiroshi ; Yokoyama, Shigeru

Author_Institution

Electr. Insulation Dept., Central Res. Inst. of Electr. Power Ind., Tokyo, Japan

Volume

17

Issue

4

fYear

2002

fDate

10/1/2002 12:00:00 AM

Firstpage

969

Lastpage

976

Abstract

This paper proposes a model of core-type distribution transformers for electromagnetic (EM) transient studies. The model accurately reproduces not only the impedance characteristics seen from each terminal of a core-type distribution transformer but also the surge-transfer characteristics between the primary and secondary sides in a wide range of frequencies. Due to the above capability, the proposed model enables the accurate evaluation of overvoltages on distribution lines including consumer-side overvoltages. In this paper, a 10-kVA transformer is modeled, and transient-simulation results agree well with laboratory-test ones.

Keywords

EMTP; distribution networks; power system analysis computing; power system transients; power transformers; transformer cores; transformer windings; 10 kVA; core-type distribution transformers; distribution line overvoltages; electromagnetic transient analysis; electromagnetic transient studies; impedance characteristics; surge-transfer characteristics; transformer primary; transformer secondary; Capacitance; Electromagnetic modeling; Equivalent circuits; Frequency; Inductance; Iron; Power system transients; Skin effect; Surges; Transformer cores;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2002.803700

Filename

1046871