EWR under voltage load shedding scheme

The power system of Saudi Consolidated Electricity Western Region (EWR) was characterized during the past few years by a considerable load growth which gave rise to a very high loading of cables and transformers. To avoid, as much as possible, brown- and black-outs following power system faults, an emergency load shedding scheme has been set up. The tuning of this scheme has been made in a detailed model of the power system based on previously developed models and a new load modelling determined from recordings made during disturbed conditions.