A fuzzy coordination approach for multi-objective voltage and reactive power scheduling of an electric power system

The authors present a multiobjective optimal scheduling procedure based on fuzzy set theory for voltage and reactive power in power systems. The optimization procedure includes a transmission loss and bus voltage error from a target as conflicting objectives to be coordinated. Fuzzy sets are applied to measure adaptability of objectives to the operational goals and to solve the multiobjective optimization problem by maximizing a composite decision-making function. The definition of fuzzy sets can provide system operators an opportunity to decide on different preferences according to system operating conditions, thus resulting in a more flexible operation. Model analysis is employed to demonstrate the effectiveness of the approach