Study On Load Of Cast Resin Dry Type Power Transformer

Dry-type power transformer is widely used in these days because of its good qualities, such as not flammable, hard to explode, small volume, little maintenance and easy to be placed into buildings near the load center. Many people have made considerable reaches on its average and hottest spot temperature rise. But most of the efforts were focused on calculation, and experimental ways were seldom adopted.By close study on the average temperature rise, temperature distribution, and tune constant of the class F resin dry type power transformer's high voltage and low voltage winding under self-cooling and wind-cooling mode, we find out the connection between the variation of the load and the items, mentioned above. The results of the experiments can be reference to both thermal design optimization of dry type power transformer and the revision of current standards.Meanwhile, we develop the software, which can predict the overload ability of the dry type power transformer. Under different load, when we apply this software to any time, region and cooling way, we can get the hottest spot increment and aging rating. To manufactory, the software means sounder thermal design, which will meet the load, putted forward by user, while to user, the software equal to a master who can help them decide the capacity rating of the transformer, which will fit the load. By using the software, the potential danger and the waste, caused by unfit load choice may be avoided.