Isolated flyback DC chopper-type single-stage multi-input inverter for parallel time-sharing power supply

Abstract

The invention relates to an isolated flyback DC chopper-type single-stage multi-input inverter for parallel time-sharing power supply. A circuit structure of the isolated flyback DC chopper-type single-stage multi-input inverter is formed by connecting multiple common-ground input filters and a common output filter circuit through a multi-input and single-output combined isolated bi-directional flyback DC chopper; each input end of the multi-input and single-output combined isolated bi-directional flyback DC chopper is connected with an output end of each input filter in a manner of one-to-onecorrespondence; and the output end of the multi-input and single-output combined isolated bi-directional flyback DC chopper is connected with the output filter circuit. The inverter has the characteristics of common-ground input sources, time-sharing power supply, electric isolation of output and input, a simple circuit topology, single-stage power conversion, high power density, high conversionefficiency, high reliability in a short circuit of load, low output capacity and a wide application prospect, and a key technology is laid for a low-capacity distributed power supply system for combined power supply of multiple new energy sources.

Description

technical field [0001] The invention relates to a parallel time-sharing power supply isolated flyback DC chopper 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 between the o...

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