Electromagnetic Analysis and Electrical Signature-Based Detection of Rotor Inter-Turn Faults in Salient-Pole Synchronous Machine

被引：24

作者：

Valavi, Mostafa ^{[1
]}

Jorstad, Kari Gjerde ^{[1
]}

Nysveen, Arne ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Elect Power Engn, N-7034 Trondheim, Norway

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2018年 / 54卷 / 09期

关键词：

Electrical signature analysis; hydrogenerators; inter-turn faults; online condition monitoring; radial forces; DIAGNOSIS;

D O I：

10.1109/TMAG.2018.2854670

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, rotor inter-turn faults in salient-pole synchronous machines are investigated using finite-element analysis. The machine under study is a 22 MVA eight-pole hydropower generator with fractional-slot windings. Simulated faulty cases include 1, 2, 5, 10, and 20 short-circuited turns (out of 58 turns) in one rotor pole. In the electromagnetic analysis, the effect of faults on airgap flux density and radial forces is studied. Furthermore, this paper investigates online detection of inter-turn faults using spectral analysis of stator voltage or current is studied. The amplitude of fault-related harmonics is investigated at various fault severities, as well as at no-load and full-load operations. This paper also discusses the effects of damper bars, an influence of parallel circuits in the stator windings, and influence of the pole pair number. In addition, a comparison between fault-related harmonics in the case of dynamic eccentricity and rotor inter-turn faults is presented.

引用

页数：9

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