Tytelmaier K. High-efficient dc-dc converters for portable photovoltaic systems.

The оbject of research: semiconductor converters of electric energy as a part of a portable photovoltaic power supply with the storage of the electric power. The purpose of research: to increase the efficiency of conversion of electrical energy obtained from solar radiation as part of portable power sources, by justifying the appropriate choice of topology of the semiconductor converter, taking into account a set of key indicators of its quality. Methods of research: theory of electric circuits, the provisions of the fundamental theory of linear and nonlinear pulse systems, the method of averaging by state space, mathematical modeling, physical experiment. Theoretical and practical results and innovations: the substantiation of expedient choice of topology of the semiconductor converter taking into account a complex of the basic indicators of its quality is offered, the analytical method of calculation of optimum coefficient of magnetic coupling of pair quantity of inductors for a bidirectional voltage converter with phase alternation is offered, a new hysteresis power take-up optimizer for use in photovoltaic power converter (MPPT) search systems is proposed, a bidirectional voltage converter control system in a portable photovoltaic power supply is proposed, which differs from the existing ones in that it uses model predictive control (MPC), developed an auxiliary photovoltaic power supply based on flexible PV with power storage and improved efficiency, weight and dimensions. A subject degree of introduction: the main results of the work are recommended for use in the development of LLC "Piezosensor" and PJSC "CheZaRa". Scientific results are used in the educational process of NU "Chernihiv Polytechnic". Effectiveness of implantation: a significant technical and economic effect is obtained, which consists in the efficiency of conversion of electric energy obtained from solar radiation into portable power sources. Sphere of use: DC power supplies based on renewable sources.