Analysis of Improved Buck-Boost Converter Based on Graph Theory

The energy market is becoming more and more complex, and various harmonics and distributed energy have impacted the large power grid. Various factors have led to the need for more scientific and rational allocation of energy, so as to achieve continuous and reliable operation of the system. Realizing the control of energy storage systems to make them reliable and efficient has gradually become a huge challenge for modern power systems. Large-scale advanced battery energy storage technology faces the limitations caused by battery cell inconsistency, and the highly integrated and intelligent control of the equalization circuit is the solution to this problem. In this paper, by improving the structure of the traditional buck-boost circuit, a multi-input and multi-output converter which is easy to expand is proposed to realize the energy transfer between the individual cells of the battery pack. At the same time, the graph theory model of the equalization circuit is established. The efficiency of the related circuit is compared and analyzed through simulation and experiment. Finally, the superiority of the novel circuit topology proposed in this paper is verified. Simplify the practical problems of complex engineering into simple graphs in graph theory, so that comparisons under the same dimension can be easily obtained to obtain the merits and demerits of each method.