Single-stage multi-input high frequency link inverter adopting multi-winding simultaneous/time-sharing power supply current

Abstract

The invention relates to single-stage multi-input high frequency link inverter adopting multi-winding simultaneous / time-sharing power supply current. The circuit structure of the inverter is formed byconnecting multiple high-frequency inverter circuits and a common output cycle conversion and filter circuit in series through a multi-input single-output high-frequency transformer, wherein the high-frequency inverter circuits are isolated from one another and provided with input filters and storage inductors; input ends of the multi-input single-output high-frequency transformer are connected in one-to-one correspondence with output ends of the corresponding high-frequency inverter circuits; the output end of the multi-input single-output high-frequency transformer is connected with the input end of the output cycle conversion and filter circuit. The inverter has the characteristics of realizing simultaneous / time-sharing power supply of the multiple input sources and output and input high-frequency isolation, sharing the common output cycle conversion and filter circuit, adopting concise circuit and single-stage power conversion, being high in voltage matching capacity, high in power density, high in conversion efficiency and broad in application prospect and the like, multiple input sources are common-ground or not common-ground, and a key technology is provided for distributedpower supply systems with intermediate or small capacity for combined power supply based on multiple new energy resources.

Description

technical field [0001] The multi-winding simultaneous / time-sharing power supply current type single-stage multi-input high-frequency link inverter involved in the 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 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...

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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