Series and Simultaneous Power Supply Isolated Flyback DC Chopper Type Single-stage Multi-input Inverter

Abstract

The invention relates to a single-stage multi-input inverter with simultaneous power supply in series and isolated flyback DC chopper. The filter is connected with a shared output filter circuit. Each input terminal of the multi-input and single-output combined isolation bidirectional flyback DC chopper is connected with the output terminal of each input filter in one-to-one correspondence, and the combined isolation of multiple input and single output The output terminal of the bidirectional flyback DC chopper is connected with the output filter circuit. This kind of inverter has the advantages of multiple input sources with different ground, time-sharing or simultaneous power supply, electrical isolation between output and input, simple circuit topology, single-stage power conversion, high power density, high conversion efficiency, high reliability when the load is short-circuited, and output The characteristics of small capacity and wide application prospects have laid a key technology for realizing the small-capacity distributed power supply system of multiple new energy joint power supply.

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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