Proposition of Individual Loading Guide for Power Transformers

The summary form only given. Primary, secondary, electromagnetic core, and cooling material (oil or SF
₆
gas) temperature equations are developed and differentially calculated in varying load current and ambient temperature in this paper. The winding hottest-spot temperature shall be integrated simultaneously for 24 hours (one day) to acquire aging loss. Then individual loading guide for power transformers are introduced and proposed as a new method for evaluating transformers of aging loss.