A photovoltaic plant connected to the HV network has experienced more than 30 transformer failures in less than 6 months. Weidmann Knowledge Services were engaged to perform a range of services in order to determine the cause of the failures and suggest corrective action:
- Transformer assessment (failure analysis and existing fleet)
- On-site measurements
- Network simulations
- Transformer manufacturer investigation and audit
- Dielectric and moisture tests
Following an extensive investigation and tests performed by Weidmann Laboratory Services, the root cause of the problem was identified and rectifying action put in place.
This investigation was awarded BEST PAPER at the 2016 IEEMA 2nd TRAFOTECH International Conference in New Delhi, India. http://ieema.org/event/trafotech2016/