Remaining life assessment 150/20 kV trafo with isolation degradation method

Abstract

The life of a transformator (trafo) is determined by some of the conditions experienced by the trafo when the trafo is loaded. One of the conditions that provide high effect the life of the trafo is the amount of working temperature on the trafo. The high low-temperature trafo at load time is determined by the amount of load generated, the ability of the trafo to release the heat generated and the circumstances surrounding the trafo. In this research, the determination of trafo life by using isolation degradation method by measuring the temperature of top - oil, hot - spot temperature, and the amount of load generated by the trafo. The study was conducted by taking a case study of 150KV / 20KV trafo on Titi Kuning Substation. From the results of research on the trafo type, trafostar obtained the rest of the life of the trafo 2 in the Main Station Titi Kuning can survive for 11 years. With a load factor of 0.72 pu, a total hot-spot temperature of 169.20C, and an environmental temperature of 260C.