Series and power supply-isolation flyback DC chopping type monopole multi-input inverter

Abstract

The invention relates to a series and power supply-isolation flyback DC chopping type monopole multi-input inverter. The circuit structure is formed by connecting a plurality of input filters which are not in common ground and a shared output filtering circuit through a multi-input and single-output combined isolation bidirectional flyback DC chopper, each input end of the multi-input and single-output combined isolation bidirectional flyback DC chopper is connected with an output end of each input filter in one-to-one correspondence, and an output end of the multi-input and single-output combined isolation bidirectional flyback DC chopper is connected with the output filtering circuit. The inverter has the characteristics of divided or simultaneous power supply, monopole power conversion,high power density, high conversion efficiency, high reliability during short-circuit of a load, small output capacity, wide application prospect and the like, multiple input sources are not in common ground, an output and an input are electrically isolated, and a key technology is laid for a small-capacity distributed power supply system for achieving combined power supply of various new energysources.

Description

technical field [0001] The invention relates to a series and simultaneous power supply isolated flyback DC chopper type single-stage multi-input 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 matching between the...

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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