INTELLIGENT CONTROL SCHEME FOR MITIGATING VOLTAGE SAG AND SWELL PROBLEM IN ELECTRICAL POWER SYSTEM USING REACTIVE POWER MANAGEMENT

The higher power demand and competitive environment of electric power industries has forced the electrical equipment usage to its maximum capacity which raises the serious power quality issues such as voltage sag or swell problems in the electrical power system. The power quality issues can be effectively solved in minimum time by properly installing the FACTS devices such as FC - TCR and STATCOM in the model of the system with control strategy based on advanced intelligent control. This pap er presents the effective solution of power quality issues using the FC - TCR and STATCOM in the model of the system. The ANFIS and fuzzy logic based control are designed and implemented in a closed - loop fashion and the application results of improvement are presented through various simulation results. The conventional PI is also designed for the considered power system; however, its performance is not up to the acceptance level whereas the system performance improves significantly through the combination of FACTS with intelligent control schemes.