Studies to utilise calculational condition information and AMR measurements for transformer condition assessment

In this paper practical solution for transformer monitoring based on the temperature and ageing calculations is studied. The described monitoring methods are evaluated with measured data collected with implemented a pilot measurement system. The measurement system utilises an AMR-meter, which is commonly used in Vattenfall´s network in Finland. The usability of the measurement data has been evaluated with temperature and ageing modelling software. Results of the evaluation indicate that the calculation methodology and the measurement system can be used also for larger scale monitoring purposes quite effectively if the functionality can be integrated for existing measurement systems.