Using Simplified Models to Assist Fault Detection and Diagnosis in Large Hydrogenerators
المؤلفون المشاركون
Brito Junior, Geraldo Carvalho
Machado, Roberto Dalledone
Chaves Neto, Anselmo
المصدر
International Journal of Rotating Machinery
العدد
المجلد 2017، العدد 2017 (31 ديسمبر/كانون الأول 2017)، ص ص. 1-18، 18ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2017-04-27
دولة النشر
مصر
عدد الصفحات
18
التخصصات الرئيسية
الملخص EN
Based on experimental evidence collected in a set of twenty 700 MW hydrogenerators, this article shows that the operating conditions of large hydrogenerators journal bearings may have unpredictable and significant changes, without apparent reasons.
These changes prevent the accurate determination of bearing dynamic coefficients and make the prediction of these machines dynamic behavior unfeasible, even using refined models.
This makes it difficult to differentiate the normal changes in hydrogenerators dynamics from the changes created by a fault event.
To overcome such difficulty, this article proposes a back-to-basics step, the using of simplified mathematical models to assist hydrogenerators vibration monitoring and exemplifies this proposal by modeling a 700 MW hydrogenerator.
A first model estimates the influence of changes in bearing operating conditions in the bearing stiffnesses, considering only the hydrodynamic effects of an isoviscous oil film with linear thickness distribution.
A second model simulates hydrogenerators dynamics using only 10 degrees of freedom, giving the monitored vibrations as outputs, under normal operating conditions or in the presence of a fault.
This article shows that simplified models may give satisfactory results when bearing operating conditions are properly determined, results comparable to those obtained by more refined models or by measurements in the modeled hydrogenerator.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Brito Junior, Geraldo Carvalho& Machado, Roberto Dalledone& Chaves Neto, Anselmo. 2017. Using Simplified Models to Assist Fault Detection and Diagnosis in Large Hydrogenerators. International Journal of Rotating Machinery،Vol. 2017, no. 2017, pp.1-18.
https://search.emarefa.net/detail/BIM-1169646
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Brito Junior, Geraldo Carvalho…[et al.]. Using Simplified Models to Assist Fault Detection and Diagnosis in Large Hydrogenerators. International Journal of Rotating Machinery No. 2017 (2017), pp.1-18.
https://search.emarefa.net/detail/BIM-1169646
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Brito Junior, Geraldo Carvalho& Machado, Roberto Dalledone& Chaves Neto, Anselmo. Using Simplified Models to Assist Fault Detection and Diagnosis in Large Hydrogenerators. International Journal of Rotating Machinery. 2017. Vol. 2017, no. 2017, pp.1-18.
https://search.emarefa.net/detail/BIM-1169646
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1169646
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر