The study of ferroresonance effects in electric power equipment

Abstract

Ferroresonance causes overvoltages and overcurrents which may jeopardize the safety of power system equipment. In this paper, a comprehensive study of the phenomenon was made using a 3 phase,core type,100kva,33/0.415kv Dy11 power transformer and Matlab simulations. Atani injection substation, in Onitsha, was taken as a model and parameters were taken from there for the studies. The results show that ferroresonce can cause dangerous over voltages and overcurrents in core type transformers. Methods of mitigating ` ferroresonance effects in power system equipment are also suggested