نتایج جستجو برای: winding mechanical fault

تعداد نتایج: 303679  

2002
Michele L. Cooke Ayako Kameda

[1] Mechanical models examine deformation within eight different structural cross sections proposed by Davis et al. [1989] and Shaw and Suppe [1996] along a northeastsouthwest transect across the Los Angeles Basin, California. Horizontal contraction of the models, constrained by geodetic measurements, yields varying dip-slip rates along frictionally sliding faults within the different cross sec...

Multiple coupled circuit modeling of squirrel-cage induction motors, or winding function approach is the most detailed and complete analytical model used to analyze the performance of the faulty induction motors. This paper extends the above-mentioned model to a saturable model including variable degrees of the saturation effects using an appropriate air gap function and novel techniques for lo...

Journal: :Entropy 2016
Nantian Huang Lihua Fang Guowei Cai Dianguo Xu Huaijin Chen Yonghui Nie

In order to improve the identification accuracy of the high voltage circuit breakers’ (HVCBs) mechanical fault types without training samples, a novel mechanical fault diagnosis method of HVCBs using a hybrid classifier constructed with Support Vector Data Description (SVDD) and fuzzy c-means (FCM) clustering method based on Local Mean Decomposition (LMD) and time segmentation energy entropy (T...

Journal: :Iet Renewable Power Generation 2023

The inter-turn short-circuit fault of a power transformer has large current in the winding, which will cause serious heating and deformation winding may threaten safety transformer. Under this background, paper proposes scheme based on open-delta voltage monitoring identification short circuits transformers. First, mathematical modeling analysis principle transformers are carried out, expressio...

Journal: :Energies 2022

A frequency response analysis (FRA) is a well-known technique for evaluating the mechanical stability of power transformer’s active part components. FRA’s measuring practices have been industrialised and are codified in IEEE IEC standards. However, because there no valid coding standard, interpretation FRA data still far from being widely acknowledged authoritative approach. This study proposes...

Journal: :CES Transactions on Electrical Machines and Systems 2019

Journal: :Journal of Electrical Systems and Information Technology 2015

2009
Ashraf Tantawy Xenofon Koutsoukos Gautam Biswas

Differential protection is a popular method to protect aircraft generators against winding faults. Traditional relay-based systems have a limited capability to distinguish between differential current resulting from a winding fault, and the one resulting from measurement noise or current saturation, resulting in false alarms and unnecessary equipment shutdown. Modern aircraft generators are mon...

Journal: :Entropy 2016
Nantian Huang Huaijin Chen Shuxin Zhang Guowei Cai Weiguo Li Dianguo Xu Lihua Fang

Mechanical faults of high voltage circuit breakers (HVCBs) are one of the most important factors that affect the reliability of power system operation. Because of the limitation of a lack of samples of each fault type; some fault conditions can be recognized as a normal condition. The fault diagnosis results of HVCBs seriously affect the operation reliability of the entire power system. In orde...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید