Voltage Security Improvement Using Fuzzy Logic Systems

This paper presents a new approach using fuzzy bet theory for voltage and reactive power control of power systems. The predication of steady state voltage stability conditions in a transmission network. The voltage stability is checked by formulating an L and the corresponding uncertainties input parameters are efficiently modeled in terms of fuzzy sets by using triangular membership function. The proposed technique will be highly useful to ensure voltage security of power system by predicting the nearness of voltage collapse with respect to the existing load condition. The approach translates violation level of buses voltage and controlling ability of controlling devices into fuzzy set notations using linearized model. A modified IEEE 30-bus test system is used to demonstrate the application of the proposed approach. Simulation result shows that the approach is efficient and has good flexibility and adaptability for voltage-reactive power control.