An improved modelling technique of a fibre optical digital system for power system protection relay

Fibre optical systems for power system communication are finding widespread use in the electricity supply industry. In this respect, it is important to ascertain the effect on signals transmitted due to the limitation imposed by the various components within the fibre optical system. This paper is thus concerned with describing a complete computer-aided design of a fibre optical system. Results are presented with respect to an EHV transmission line differential protection scheme employing a fibre optical system as a means of communicating between the two ends