Fault Location and Voltage Sag Analysis in Electric Distribution Network

Fault in the power distribution system causes protection system tripped and the electrical supply disturbed. The electrical fault occurred by lightning, strong wind, wood cutting, then the aging and an inadequate network component maintenance. It certainly leads to the poor power quality and voltage sag as well. An assessment power quality is an essential thing for utility and the energy supplier to identify and fix a critical area up. The fault location program has an important role in short-term planning operation of electric distribution network to reduce downtime and improve system reliability. A network modelling and faults simulation has been done to obtain voltage sag and current information. Then, the voltage sag at measurement point will be purposed to identify and classify a fault by using K-Means Clustering. Fault location estimation used by technician to repair electrical supply in real system, Kupang substation.