Series and power supply-isolation flyback cycle conversion-type monopole multi-input inverter

Abstract

The invention relates to a series and power supply-isolation cycle conversion-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 isolation energy storage transformation cycle conversion filtering circuit through a multi-input and single-output high-frequency inversion circuit with a series simultaneous selection switch, each input end of the multi-input and single-output high-frequency inversion circuit 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 high-frequency inversion circuit is connected with an input end of an energy storage transformer of the output isolation energy storage transformation cycle conversion filtering circuit. The inverter has the characteristics of divided or simultaneous power supply, simple circuit, monopole power conversion, high efficiency, high reliability during short-circuit of a load, 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 energy sources.

Description

technical field [0001] The invention relates to a series and simultaneous 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 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 betw...

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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