The growth of the randomly and indeterminately changing state of electric network of power grid, caused by the use of distributed generation, continues to significantly affect the behavior and modeling for planning and operational control of its mode. Existing approaches become inadequate for models with probabilistic fuzzy parameters. In these conditions, the issues of development of new methods, algorithms and control tools for regime parameters of electric networks based on the theories of fuzzy logic and fuzzy sets become more urgent. Model and algorithm for controlling capacitor banks in electrical networks with distributed generation, based on the use of fuzzy logic mathematical apparatus, is proposed in the paper.