Simultaneous power supply flyback cycle conversion type single-stage multi-input inverter with energy storage equipment

Abstract

The invention relates to a simultaneous power supply flyback cycle conversion type single-stage multi-input inverter with energy storage equipment. A circuit structure of the inverter is formed by connecting multiple not-common-ground input filters and a common output isolation energy storage voltage transformation cycle conversion filter circuit by virtue of a multi-input single-output high-frequency inverter circuit with a series simultaneous selector switch, and a circuit with functions of charging the energy storage equipment and suppressing a voltage spike of a power switch is connected between two ends of a power switch of a two-way power flow single-input single-output high-frequency inverter circuit and an output end of an input filter of the nth path of energy storage equipment, wherein n is a natural number greater than 1; each input end of the multi-input single-output high-frequency inverter circuit is connected with the output end of each input filter in a one-to-one correspondence manner; the output end of the multi-input single-output high-frequency inverter circuit is connected with an input end of an energy storage type transformer of the output isolation energy storage voltage transformation cycle conversion filter circuit. A key technology is laid for realizing a small-capacity distributed power supply system with energy storage equipment.

Description

technical field [0001] The invention relates to a simultaneous power supply flyback cycle conversion type single-stage multi-input inverter 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 The matc...

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

Images