RESEARCH ON TRANSFORMER'S FORCED-OIL-AIR COOLING CONTROL SYSTEM BASED ON PCC

摘要

The contact ants and relays is adopted in electrical control circuit of existed transformer's forced-oil-air cooling control system, with low reliability, little protection function, uneasily extended and no communication interface. The way that Programmable computer controller (PCC) with high reliability and versatility replaces partial unreliable contact ants and relays to modify older system is presented, and a new transformer's forced-oil-air cooling control system is designed. Its site operation shows that the device is of high operation reliability and control accuracy, has perfect functions and notable effect of power saving.