Energy-storage device simultaneous power supply flyback direct current conversion-type quasi single-stage multi-input inverter

Abstract

The invention relates to an energy-storage device simultaneous power supply flyback direct current conversion-type quasi single-stage multi-input inverter, the circuit structure thereof is that a plurality of input filters which are not common-grounded are connected with a public output isolation energy storage voltage transformation and rectification inversion filtering circuit via a multi-inputsingle-output high frequency inversion circuit having a serial simultaneous selection switch, and a circuit capable of charging an energy-storage device and suppressing the power switch voltage peak is arranged between two ends of the power switch of a dual-direction power flow single-input single-output high frequency inversion circuit and the output end of the input filter of an n-path energy storage device, n is a natural number which is greater than 1, each input end of the multi-input single-output high frequency inversion circuit is correspondingly connected with the output end of each input filter, the output end of the multi-input single-output high frequency inversion circuit is connected with the input end of the energy-storage transformer of the output isolation energy storage voltage transformation and rectification inversion filtering circuit, and the key technology is provided for the energy-storage device small volume distribution power supply system.

Description

technical field [0001] The invention relates to a flyback DC conversion type quasi-single-stage multi-input inverter with simultaneous power supply with energy storage equipment, 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 ...

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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