Summary

This TB based on a questionnaire on the industry's experience with stress-grading degradation of stator endwinding in hydropower generators, verified that this deterioration is not uncommon and often occurs a few years after commissioning. This leads to life reduction of winding and ozone generation. Standard technical specifications and testing procedures are not available yet. This TB describes experts' xperiences for inspection, maintenance and testing of the endwindings in factory and on complete stator windings.

Additional informations

Publication type Technical Brochures
Reference 522
Publication year 2013
Publisher CIGRE
Study committees Power Generation and Electromechanical Energy Conversion (A1)
Working groups WG A1.02
File size 3 MB
Pages number 400
Price for non member 300 €
Price for member Free
Generator Stator Winding Stress Grading Coating Problem
Generator Stator Winding Stress Grading Coating Problem