Shapoval I. Scientific bases of creation of power generation complexes with reactive power compensation and active filtering based on doubly-fed induction generator

The object of research: the processes of generating electricity by complexes based on a doubly-fed induction generator with converters in rotor and stator. The purpose of the work is to improve the quality of the generated electricity by developing and implementing the scientific foundations for the creation of generation complexes with reactive power compensation and active current filtering based on doubly-fed induction generator. Methods of research: the method of continuous Laplace transformation; method of space vectors; the theory of linear differential equations; harmonic analysis and synthesis of output voltage waveforms of semiconductor converters; elements of matrix calculus; the theory of instantaneous power and methods of transformation of coordinates; the theory of electric circles; mathematical and physical modelling. Theoretical and practical results and novelty: a new control method of a doubly-fed induction generator with simultaneous control over stator and rotor is developed; new principles of formation of input currents of matrix converters of rotor of doubly-fed induction generator are developed; for the first time, a strategy for compensation of unbalanced and non-sinusoidal currents generated by a doubly-fed induction generator was developed, in the conditions of connecting nonlinear loads; a new combined method of compensation of harmonic components of current generated by a doubly-fed induction generator was developed; for the first time, a control strategy of semiconductor converters in the rotor of doubly-fed induction generator with parallel active filtering functions was developed; software for practical implementation of control methods of doubly-fed induction generator based on the digital signal processor is developed. Degree of implementation: the obtained results are implemented in the educational process of the Department of Renewable Energy Sources of NTUU "KPI named after Igor Sikorsky". Scope of application: power generation systems.