SUMMARY
It is considered a wind power plant rotor design problem for a rotor with vertical axis of rotation. It is proposed an approarch of efficiency improvement by combined rotor design, consisting of some basic rotors (Darrieus rotors) and some booster rotors (Savonius rotors), with further combined rotor structural parametric synthesis problem solution. This task represents the conditional multicriteria optimization problem, for solution of which it is proposed to use the modificated SPEA2 genetic algorithm. It’s proposed procedure of the fitness function construction. The given purpose is supplied with help of computer-aided design system.