Direct current transformer capable of implementing buck-boost conversion

Abstract

The invention provides a direct current transformer capable of implementing buck-boost conversion. The direct current transformer comprises a first chain type module and a second chain type module, wherein the first chain type module and the second chain type module are connected in parallel; one end of the first chain type module is connected with the anode connection end of a first power supply, and the other end of the first chain type module is connected with the cathode connection end of the first power supply; and one end of the second chain type module is connected with the cathode connection end of a second power supply, and the other end of the second chain type module is connected with the anode connection end of the second power supply. The direct current transformer further comprises an inductor L and an inductor La, wherein one end of the first chain type module is connected with the anode connection end of the first power supply by the inductor La, and the other end of the first chain type module is connected with the cathode connection end of the first power supply by the inductor L; and the other end of the second chain type module is connected with the anode connection end of the second power supply by the inductor L. Various direct current transformers provided by the invention can simultaneously implement buck-boost conversion; and the direct current transformer provided by the invention is simple in structure, reasonable in layout and easy to popularize.

Description

Technical field [0001] The invention relates to a direct current transformer, in particular to a direct current transformer capable of realizing step-up and down-voltage conversion. Background technique [0002] With the shortage of traditional energy sources and the intensification of environmental degradation, the utilization and development of renewable clean energy such as wind energy and solar energy have received more and more attention. New energy generation such as wind and solar energy is intermittent and random. The traditional grid structure and operation technology cannot adapt to large-scale renewable energy access. However, the multi-terminal DC transmission system and DC grid technology based on conventional DC and flexible DC are Effective means to solve this problem. Since there is no uniform standard for DC power grids, most of the existing DC lines operate at different voltage levels. In order to interconnect DC circuits of different voltage levels to form a D...

AI Technical Summary

Problems solved by technology

Moreover, the DC transformer cannot realize step-up and step-down conversion at the same time.

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