Electromagnetic Interference (EMI) in Substations

Abstract

The substation has always been a hostile environment for the telecommunication and control/automation systems. With the developing technology, the situation has transformed toward a more difficult one as the use of modern electronic systems and the number of computerized equipment with online automation and increased information transfer capability have strongly increased in protection, supervision, and control/automation equipment. At the same time, the level of energy that the components can survive has decreased, and the extent of the HV systems and the use of even higher operation voltages than before have increased such that the inherent susceptibility of modern automation and telecommunication systems to electromagnetic interference has also increased. New technologies such as fiber optics and decentralized electronics (including integrated electronic sensors/systems) have not been able to remove the interference problems.