External parallel connection time-sharing selection switch isolation flyback cycle type single-stage multi-input inverter

Abstract

The invention relates to an external parallel connection time-sharing selective switch isolation flyback cycle type single-stage multi-input inverter. The circuit is formed by connecting multiple input filters with a common ground and a shared output isolation energy storage transformer cycle conversion filter circuit, each input end of the multi-input single output high-frequency inverter circuit is connected with the output end of each input filter One-to-one corresponding connection, the output end of the multi-input single-output high-frequency inverter circuit is connected with the input end of the output isolation energy storage transformer cycle conversion filter circuit. This kind of inverter has multiple input sources common ground and time-sharing power supply, output and input electrical isolation, shared energy storage cycle conversion filter circuit, simple circuit, single-stage conversion, high efficiency, high reliability when the load is short-circuited, and wide application prospects And other characteristics, it has 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 external parallel connection time-sharing selector switch isolation flyback cycle type single-stage multi-input inverter involved in the present invention 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 ...

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