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Multi-winding, divided power supply voltage-type monopole multi-input low-frequency link inverter

A time-sharing power supply, multi-input technology, applied in the direction of converting AC power input to DC power output, wind power generation, electrical components, etc., can solve the problems of two-stage power conversion, practical limitations, low power density, etc., and achieve voltage matching. Strong capability, simple circuit topology, and small output voltage ripple

Inactive Publication Date: 2018-06-22
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Multi-winding, divided power supply voltage-type monopole multi-input low-frequency link inverter

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Embodiment Construction

[0037] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments of the specification.

[0038] The multi-winding group time supply voltage type single-stage multi-input low-frequency link inverter is a multi-input single-output low-frequency transformer that connects multiple isolated high-frequency inverter circuits with input filters and a common output The filter circuit is connected, and each input terminal of the multi-input single-output low-frequency transformer is connected with the output terminal of each high-frequency inverter circuit in one-to-one correspondence, and the output terminal of the multi-input single-output low-frequency transformer is connected with the input terminal of the output filter circuit , each of the high-frequency inverter circuits with input filters is composed of input filters, bidirectional power flow single-input and single-output high-frequency inverter ...

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Abstract

The invention relates to a multi-winding, divided power supply voltage-type monopole multi-input low-frequency link inverter. The circuit structure is formed by connecting a plurality of high-frequency inverters which are isolated to another other and are provided with input filters and a shared output filtering circuit through a multi-input and single-output low-frequency transformer, each inputend of the low-frequency transformer is connected with an output end of each high-frequency inversion circuit in one-to-one correspondence, and an output end of the low-frequency transformer is connected with an input end of the output filtering circuit. The inverter has the characteristics of divided power supply of various input sources, isolation among the high-frequency inversion circuits, simple circuit topology, monopole power conversion, high voltage matching capability, high conversion efficiency, small output voltage ripple, wide application prospect and the like, a plurality of inputsources are in common ground or are in not common ground, the output filtering circuit is shared, and a key technology is laid for a large-capacity distributed power supply system for achieving combined power supply of various new energy sources.

Description

technical field [0001] The multi-winding group time supply voltage type single-stage multi-input low-frequency link 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 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 i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M5/10H02M1/12H02M7/538
CPCH02M1/126H02M5/10H02M7/493H02M7/538H02M7/5387H02M1/007Y02E10/76
Inventor 陈道炼
Owner QINGDAO UNIV
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