Features of the determined chaos modes of dc voltage converters for wind and solar power stations

Abstract

Relevance of the researches is defined by the necessity to increase the efficiency of converters for the needs of renewable energy. The strict and conflicting requirements are often imposed to the control algorithms of DC voltage converters used in solar and wind power. The theory of deterministic chaos may be one of the ways of solving the problem of improving the algorithms. The aim of the research is to study and develop the control systems for DC-DC converters which allows working both in periodic mode and in deterministic chaos mode; to develop a physical model of DC-DC converter including the control system operating in deterministic chaos mode; make the voltage feedback circuit for stabilizing the output voltage at the given level. Research method: a review of patent and literature on the topic. The mathematical and experimental methods of investigation of the DC-DC converters were used. The method of mathematical modeling is based on preparation of electrical systems equations solution. The method of experimental research is based on the study of the output graphs, taken from the physical model of the DC-DC converters. Results. The authors have developed the physical model of the DC-DC converter with the control system operating in the deterministic chaos mode. The results show that the method of controlling the DC-DC converters with the help of deterministic chaos reduces electromagnetic interference, and improves significantly energy efficiency. The results obtained in the study can be used both at the stage of designing the power supplies in this class, and for further research and development of new control systems, including the control by deterministic chaos.

Keywords

• deterministic chaos
• DC-DC converters
• control system
• bifurcation
• dynamic chaos