Ship brushless-generator shaft misalignment simulation by using a complete mesh-model for machine voltage signature analysis (MVSA)

2009 IEEE Electric Ship Technologies Symposium Pub Date : 2009-04-20 DOI:10.1109/ESTS.2009.4906502

C. Bruzzese, A. Rossi, E. Santini, V. Benucci, A. Millerani

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引用次数: 9

Abstract

In this paper a study about the different effects of static and dynamic rotor eccentricities on the external electric variables of a brushless salient-pole synchronous generator (SG) is presented. Air-gap irreularities and related monitoring techniques for synchronous machines have been studied in the past mainly about large vertical hydro-generators [1], but similar issues have been recently recognized as worthy of attention for on-board ship generators. Static and dynamic rotor eccentricities were simulated in this work, for a medium power ship brushless generator, by using a dynamic model including inductances computed by parametric 3D FEM and MWFA-based analyses of the faulty machine, and taking in account the damping effect of the parallel paths inside the machine. Currently voltage, and no-load e.m.f. sleady-state waveforms were analyzed by FFT. No-load vollage harmonics are sensitive fault indicators, whose harmonic content directly reflects level and type of eccentricity, and which can be used ror diagnostic purposes.

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基于机械电压特征分析(MVSA)的全网格模型舰船无刷发电机轴向错位仿真

本文研究了无刷凸极同步发电机的静、动转子偏心对其外部电变量的不同影响。过去对同步电机气隙异常及相关监测技术的研究主要集中在大型立式水轮发电机上[1]，但类似的问题最近也被认为是值得关注的船上发电机。采用基于参数化三维有限元法计算的转子动态模型和基于mwfa分析的故障电机动态模型，并考虑电机内部并联路径的阻尼效应，对某中型船舶无刷发电机的静、动态转子偏心进行了仿真。利用FFT分析了电流、电压和空载电动势滑动状态波形。空载电压谐波是敏感的故障指标，其谐波含量直接反映了偏心的程度和类型，可用于故障诊断。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2009 IEEE Electric Ship Technologies Symposium

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