Power transformer assessment adjusted to tropical environment and utility requirement

Abstract-Any high voltage equipment will typically behave to a power system and power system environment where it is installed and operated. Because of it, high voltage equipment operated in tropical countries has a different characteristic compare to the one operated in temperate countries. Different symptoms and failure modes have been observed. As a consequence, different approach of inspections, assessments and hence treatments should be applied to achieve a long term performance of the equipment. Besides aforementioned technical aspects, long term equipment performance may also be influenced by non-technical aspects, such as utility´s policy on installation operation and maintenance and customer demand on reliability and quality of power energy transmission. Not to mention general constrain faced by any utility in the world: financial. Thus, in order to attain a reliable yet economic power system operation and maintenance, PLN P3B Jawa Bali as a unit which responsible for dispatching and controlling the transmission grid, needs to develop an overall equipment assessment system. In the development of such system PLN P3B Jawa Bali needs to consider technical as well as non-technical aspects. An overall assessment system for power transformer is given as the example of how the utility deals with those aspects.