Multi-winding time-sharing power supply isolation flyback cycle conversion type single-stage multi-input inverter

Abstract

The invention relates to a multi-winding time-sharing power supply isolation flyback cycle conversion type single-stage multi-input inverter. The circuit structure is formed by connecting multiple high-frequency inverter circuits that are isolated from each other and include input filters with a common output cycle conversion filter circuit through a multi-input single-output energy storage transformer, wherein each input end of the multi-input single-output energy storage transformer is connected with the output end of each high-frequency inverter circuit in a one-to-one correspondence manner, and the output end of the multi-input single-output energy storage transformer is connected with the input end of the output cycle conversion filter circuit. The inverter has the characteristics ofmulti-input source common-ground or non-common-ground state, multi-input source time-sharing power supply, output and input electrical isolation, common output cycle conversion filter circuit, simplecircuit, single-stage power conversion, high power density, high conversion efficiency, high reliability in the case of shorted load, wide application prospect and the like, and can lay a key technology for realizing a small-capacity distributed power supply system that is jointly powered by a variety of new energy sources.

Description

technical field [0001] The invention relates to a multi-winding group timed power supply isolation flyback cycle conversion 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 (including no 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 ope...

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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