“…Expert systems are software systems that represent and reason with knowledge of some specialist subject with a view to solving problems or giving advice (Jackson, 1990 The application of Expert Systems to power systems industry can tackle problems that were previously considered as human tasks. Several such systems have been developed so far (Zhang et al, 1989;Machias et al, 1990;Kaminaris et al, 1991;Kaminaris et al, 1993).…”