Three-port full-bridge inverter and method for controlling same

Abstract

The invention relates to a three-port full-bridge inverter and a method for controlling the same. The three-port full-bridge inverter comprises an input source, four switch tubes, a storage battery, an inductor, an output filter inductor, an output filter capacitor and an alternating current load, wherein a source of the first switch tube is connected in series with a drain of the second switch tube to form a first switch bridge arm; the source of the third switch tube is connected in series with the drain of the fourth switch tube to form a second switch bridge arm; an anode of the input source is respectively connected with the drain of the third switch tube and the drain of the first switch tube, and a cathode of the input source is respectively connected with the cathode of the storage battery, the source of the fourth switch tube and the source of the second switch tube; the anode of the storage battery is sequentially connected with a middle point of the second switch bridge arm and one end of the output filter inductor through the inductor; the middle point of the first switch bridge arm is respectively connected with one end of the output filter capacitor and one end of the alternating current load; and the other end of the output filter capacitor and the other end of the alternating current load are respectively connected with the other end of the output filter inductor. The invention is high in conversion efficiency, low in cost and low in power loss, and can be widely applied to the technical field of new energy generation.

Description

technical field [0001] The invention relates to an inverter and a control method thereof, in particular to a three-port full-bridge inverter in the technical field of new energy power generation and a control method thereof. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, thermal power generation, solar energy, wind energy, fuel cells and other new energy power generation technologies have become the focus of attention and research around the world. According to whether the new energy power generation system is connected to the public grid, it can be divided into grid-connected operation and independent operation. The independently operated new energy power generation system is a very important way for the application of new energy power generation, which can solve the problem of power supply in remote mountainous areas, isolated islands and other areas without power grids. The inherent defects of independent new energy...

AI Technical Summary

Problems solved by technology

The output current of each port of the existing three-port converter is DC, which cannot be used for power management and control of AC loads

However, AC loads such as AC motors are common types of loads in independent new energy power supply systems. For three-port converters with mixed AC ports and DC ports, there are few current solutions.

Images