Transient Analysis for Over-Current of Electromagnetic PT due to Single-Phase-Grounded in Ungrounded Neutral System

Author

Qu, Yilong ; Tan, Weipu ; Zhang, Jian ; Yang, Yihan

Author_Institution

Dept. of Electr. Eng., North China Electr. Power Univ., Beijing

fYear

2005

fDate

2005

Firstpage

1

Lastpage

5

Abstract

In ungrounded neutral system the over-current in the primary of electromagnetic potential transformer (PT) due to single-phase-to-earth fault takes place frequently. This paper focuses on the transient analysis of the above over-current phenomenon. Base on the equivalent circuit and the electromagnetism character of PT, we deduce the transient equation of PT current and disclosure the essence reason of over-current. With computer simulation (MATLAB) and experimental study in the laboratory (the 10 kV high voltage physical simulating system) verified the precision of the analysis result in this paper

Keywords

electromagnetism; equivalent circuits; mathematics computing; potential transformers; transient analysis; MATLAB; PT over-current; electromagnetic potential transformer; electromagnetism character; equivalent circuit; grounded neutral system; single-phase-to-earth fault; transient analysis; ungrounded neutral system; Circuit faults; Computational modeling; Computer simulation; Electromagnetic transients; Equations; Equivalent circuits; Laboratories; MATLAB; Transient analysis; Voltage transformers; Transient analysis; electromagnetic PT; over-current; ungrounded neutral system;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES

Conference_Location

Dalian

Print_ISBN

0-7803-9114-4

Type

conf

DOI

10.1109/TDC.2005.1546853

Filename

1546853