Junfei Jiang
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Fast Calculation of Transformer Hot Spot Temperature Based on Winding Equivalent Thermal Parameters Open
The hot spot temperature of a transformer is one of the critical indicators reflecting its operating status. Accurate and fast calculation of hot spot temperature is significant for the online monitoring of transformers. Considering the lo…
Top oil temperature prediction at a multiple time scale for power transformers based on adaptive extended Kalman filter Open
To achieve load management optimization and timely failure warning for power transformers, as well as improve the reliability of the power network, this paper proposes a multiple time scale prediction method for top oil temperature (TOT) b…
Thermal behaviour of a transformer mineral oil‐tank surface under incipient turn‐to‐turn short‐circuit fault Open
A slight turn‐to‐turn short‐circuit fault in the incipient stage does not trigger fuse protection, and the regular transmission and transformation functions of the transformer within the power grid are not affected very much by the incipie…
Detection of transformer winding faults using FRA and image features Open
Frequency response analysis (FRA) is a widely used approach for detecting winding faults in a transformer. Appropriate and quantitative FRA features will help to improve the accuracy of fault diagnosis. In this study, a novel FRA interpret…
FRA modelling for diagnosing axial displacement of windings in traction transformers Open
The windings of a traction transformer are always be threatened by the fluctuation of the load. Frequency response analysis (FRA) is regarded as the most effective method to diagnose the winding deformation. Appropriate FRA modelling metho…
Homogenisation model for calculating multi‐point grounding current of transformer core Open
Multi‐point grounding of the core is one of the common transformer faults. In this study, a homogenisation model based on the finite element method is developed for calculating multi‐point grounding current of the transformer core. The equ…