Marunia Y. The power hybrid filters for decentralized power supply systems.

The оbject of research: bridge rectifier with active load and capacitive filter in the system of decentralized power supply. The purpose of research: development of principles of construction of structures and development of mathematical models of power filters, determination of their efficiency to ensure electromagnetic compatibility of single-phase bridge rectifiers with active load and capacitive filter in decentralized power supply systems. Methods of research are based on the provisions of theoretical electrical engineering, the theory of electric circuits with semiconductor energy converters, the theory of planning purposeful experiments, methods of mathematical and physical modeling. Confirmation of the reliability of the results of theoretical research is provided by computer simulation of electromagnetic processes and field experiments. Theoretical and practical results and innovations: solved an important scientific problem of development of principles of construction, improvement of structures and optimization of elements of power filters aimed at ensuring electromagnetic compatibility of single-phase bridge rectifiers with active load and capacitive filter in systems of limited power. The dependences of the power quality indicators of power filters at the change of active load at the output of single-phase bridge rectifiers with a capacitive filter are established. Parametric optimization of passive filters with the properties of the current source under active loading and pulsation smoothing of the capacitive filter of the rectifier is carried out. Recommendations for rational choice and calculation of power filter structures to increase electromagnetic compatibility of nonlinear loads are developed. A subject degree of introduction: The results of work in the form of mathematical models of electromagnetic processes of current and voltage sources developed by the author, as well as scientific and practical results of research, are used in the implementation and operation of frequency-controlled electric drives produced by "Technoserviceprivid" Research and Production Company (Kyiv); principles of construction of power filters for increase of reliability of operation and modernization of the operating electric equipment and maintenance of quality of the consumed electric power are introduced by "TEMS" Scientific and Technical Firm (Kiev). Effectiveness of implantation: Theoretical results and recommendations are the basis for the development of power hybrid filters to ensure a given level of electromagnetic compatibility at a minimum cost and installed power of equipment in limited power systems. The implementation of the active corrector control method in the structure of the power hybrid filter allows to reduce the frequency of pulsed current modulation in the active corrector power reactor, the number of controlled semiconductor elements and losses during their switching. Sphere of use: adjustable electric drives, welding and other technological installations that supply their load from devices that mix at their input bridge rectifiers with a capacitive filter.