Condition Assessment of Rotating Electrical Machines using SFRA - A Survey

Sweep Frequency Response Analysis (SFRA) is a widespread technique for transformer condition assessment. In this field, there has been a lot of research and development of standards. The test is based on the comparison of a measurement of transformer in good condition, with another measurement in some other state (after transportation, failure, service time, etc.). Today, proven sensitivity and ease of testing of SFRA has generated interest for its application on rotating electrical machines. However, lack of experience and little understanding about the expected results has limited its application as a diagnosis tool. The aim of this paper is to summarize the experimental applications that have been given for the use of SFRA in rotating electrical machines. To this end, an exhaustive analysis of research work presented in conferences and journals was made.