An Instrumentation System for On-line Winding Fault Diagnosis of Three-Phase Power Transformers

M.A.M. Esteves and A.J. Marques Cardoso (Portugal)


Power transformers, fault diagnosis, instrumentation systems.


This paper presents a new prototype equipment for winding fault diagnosis in operating three-phase power transformers, based on the implementation of the Transformers On-Load Exciting Current Park's Vector Approach. The technical characteristics and operating structure of the equipment are described and some experimental results are also provided, demonstrating the effectiveness of the developed instrumentation system. On-site tests conducted in a power generation plant, using the diagnostic instrumentation system developed are also represented.

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