Summary

JWG A2/B4.28 monitored the reliability in service of HVDC Converter Transformers and the TB reports, over a period 1971-2009, an encouraging decrease in the failure rate. It also reviewed existing standard test specifications, with a view of representing the real service conditions. The importance of the Polarity Reversal (PR) test and the effect of the oil conductivity and the polarization time are stressed. The conclusion is that at this stage the existing test should not be modified.

Additional informations

Publication type Technical Brochures
Reference 406
Publication year 2010
Publisher CIGRE
Study committees Power transformers and reactors (A2), DC systems and power electronics (B4)
Working groups JWG A2/B4.28
File size 574 KB
Pages number 38
Price for non member 80 €
Price for member Free
HVDC Converter Transformers - Design review, test procedures, ageing evaluation and reliability in service
HVDC Converter Transformers - Design review, test procedures, ageing evaluation and reliability in service