Fuzzy logic in voltage and reactive power control in regulated and deregulated environments

This paper presents results of research aimed at improving the efficiency of coordinated on-line control of voltage and reactive power on the basis of developing models, methods, and a control system integrating traditional numerical methods with fuzzy logic technology. An approach based on experimental design is applied to construct diverse types of sensitivity indices, which serve for evaluating efficiency of control actions and, therefore, for constructing fuzzy production rules included in the knowledge base. The rules considered in the paper are applicable for voltage and reactive power control in regulated and deregulated environments. Questions of constructing linguistic variables and tuning a fuzzy model are discussed. Some aspects of rational carrying out of fuzzy logic procedures are considered