Novel Identification Method of Stator Single Phase-to-Ground Fault for Cable-Wound Generators

Author

Gao, Yan ; Lin, Xiangning ; Tian, Qing ; Liu, Pei

Author_Institution

Univ. of Sci. & Technol., Wuhan

Volume

23

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

349

Lastpage

357

Abstract

A new criterion to detect the stator single phase-to-ground fault for Powerformer is proposed in this paper, which is based on the direction of zero-sequence compositive power flow. By virtue of the analysis of new fault characteristics of Powerformer and the comparison with conventional methods, a novel identification scheme is put forward. The proposed approach detects the ground fault by analyzing the power direction. Only zero-sequence current from the terminal of Powerformer and zero-sequence voltage from the busbar are used in this scheme. Combined with third-harmonic principle, it can provide a 100% coverage of fault detection for the stator windings of Powerformer. The effectiveness of this scheme is validated with the Matlab simulation results.

Keywords

electric generators; electrical faults; fault diagnosis; stators; cable-wound generators; fault detection; powerformer; stator single phase-to-ground fault; stator windings; third- harmonic principle; zero-sequence compositive power flow; zero-sequence current; Fault currents; Fault detection; Fault diagnosis; Frequency; Load flow; Phase detection; Power generation; Relays; Stator windings; Voltage control; Fault components; Powerformer; stator single phase-to-ground fault; zero-sequence compositive power flow;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/TEC.2008.921554

Filename

4505389