Multi-winding, divided power supply and forward DC chopping-type monopole multi-input high-frequency chain inverter

Abstract

The invention relates to a multi-winding, divided power supply and forward DC chopping-type monopole multi-input high-frequency chain inverter. The circuit structure is formed by connecting a plurality of isolated input filters and a shared output filtering circuit through a combined multi-input and single-output isolation bidirectional forward DC chopper, each input end of the combined multi-input and single-output isolation bidirectional forward DC chopper is connected with an output end of each input filter in one-to-one correspondence, and an output end of the combined multi-input and single-output isolation bidirectional forward DC chopper is connected with the output filtering circuit. The inverter has the characteristics of multi-input power supply electrical isolation, divided power supply, simple circuit topology, monopole power conversion, high power density, high conversion efficiency, high output waveform quality, wide application prospect and the like, an output and an input are in high-frequency isolation, and a key technology is laid for an intermediate- and large-capacity distributed power supply system for achieving combined power supply of various new energy sources.

Description

technical field [0001] The invention relates to a multi-winding group timed power supply forward DC chopper type single-stage multi-input high-frequency link inverter, which belongs to the power electronic conversion technology. Background technique [0002] The inverter is a static converter device that uses power semiconductor devices to convert an unstable and inferior DC power into a stable and high-quality AC power for AC loads or AC grid connection. Inverters with low-frequency electrical isolation or high-frequency electrical isolation between the output AC load or the AC grid and the input DC power supply are called low-frequency link and high-frequency link inverters, respectively. The electrical isolation components mainly play the following roles in the inverter: (1) realize the electrical isolation between the output and input of the inverter, and improve the safety, reliability and electromagnetic compatibility of the inverter operation; (2) realize The matchin...

AI Technical Summary

Problems solved by technology

The distributed power generation system realizes multiple input sources simultaneously supplying power to loads and prioritizing the utilization of energy, which improves the stability and flexibility of the system, but there are defects such as two-stage power conversion, low power density, low conversion efficiency, and high cost. Its practicality is limited to a large extent

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