Multi-winding time-sharing power supply forward cycle conversional single-stage multi-input high-frequency link inverter

Abstract

The invention relates to a multi-winding time-sharing power supply forward cycle conversional single-stage multi-input high-frequency link converter. A circuit structure thereof is formed by connecting multiple mutually isolated high-frequency inversion circuits with input filters and a common output cycle conversion filter circuit through a multi-input single-output high-frequency transformer; each input end of the multi-input single-output high-frequency transformer is connected with the output end of each high-frequency inversion circuit in one-to-one corresponding way; the output end of the multi-input single-output high-frequency transformer is connected with the cycle transformer input end of the output cycle conversion filter circuit. The inverter has the characteristics that the multiple input sources are in common grounding or not, the multiple input sources are in time-sharing power supply, the output and the input are in high-frequency isolation, the output cycle conversionfilter circuit is shared, the circuit topology is concise, the inverter is in single-stage power conversion, the power density is high, the conversion efficiency is high, the output voltage ripple issmall, and the application prospect is wide; and the key technology is laid for realizing a middle-small capacity distributed power supply system in joint power supply of various energy resources.

Description

technical field [0001] The invention relates to a multi-winding group-time power supply forward cycle conversion type single-stage multi-input high-frequency link 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 ma...

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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