Voltage sag distributions caused by power system faults

Summary form only given. Voltage sag distributions caused by faults at different voltage levels and experienced by low voltage customers were established for four different power system areas. The shares of different fault types at each voltage level and the sag propagation throughout the power system were taken into account. The results show that the origin of sags in urban and rural areas tends to be different. This data is needed when, for example, planning measures for sag mitigation in different parts of the power system.