نتایج جستجو برای: winding mechanical fault
تعداد نتایج: 303679 فیلتر نتایج به سال:
[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...
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...
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...
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...
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...
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...
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