A NEW FUZZY CONTROL APPROACH TO VOLTAGE PROFILE ENHANCEMENT FOR POWER-SYSTEMS

This paper presents a new approach using fuzzy set theory for voltage and reactive power control of power systems. The purpose is to enhance voltage security of an electric power System. The violation bus volta ge and the controlling variables are translated into fuzzy set notatio ns to formulate the relation between voltage violation level and contr olling ability of controlling devices. A feasible solution set is firs t attained using the min- operation of fuzzy sets, then the optimal so lution is fast determined employing the max- operation. A modified IEE E 30-bus test system is used to demonstrate the application of the pro posed approach. Simulation results show that the approach is efficient anti has good flexibility and adaptability for voltage-reactive power control.