An advanced model for automatic fault management in distribution networks

An automatic computer model, called the FI-model, for fault location, fault isolation and supply restoration is presented. The model works as an integrated part of substation SCADA and medium voltage distribution network automation systems, including protective relays and AM/FM/GIS. In the model, three different techniques are used for fault location: computed fault distance; analysis of fault indicator readings; and statistical analysis of the line section fault frequencies. Once the faulty section is identified, it is automatically isolated by the remote control of line switches, and supply is restored into the remaining parts of the feeder