Chromatic Optoacoustic Monitoring of Transformers and Their Onload Tap Changers

This contribution presents the rationale, basis, and potential for continuous and event-driven online chromatic acoustic monitoring of transformers and their tap changers. Illustrations are given from a feasibility project for monitoring transformers at several substation sites in the Manchester and Stoke regions of the U.K. Examples of monitoring outputs are presented in a top-down order of infor...