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External parallel time-sharing selection switch voltage-type monopole multi-input low-frequency link inverter

A time-sharing selection and switching voltage technology, which is applied in the direction of converting DC power input to DC power output, converting AC power input to DC power output, and adjusting electrical variables, etc., can solve the problem of two-stage power conversion, low power density, and practicality. Limitation and other issues, to achieve the effect of small output voltage ripple, large output capacity, and simple circuit topology

Inactive Publication Date: 2018-06-01
QINGDAO UNIV
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  • Claims
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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

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  • External parallel time-sharing selection switch voltage-type monopole multi-input low-frequency link inverter
  • External parallel time-sharing selection switch voltage-type monopole multi-input low-frequency link inverter
  • External parallel time-sharing selection switch voltage-type monopole multi-input low-frequency link inverter

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Embodiment Construction

[0033]The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments of the specification.

[0034] The external parallel time-sharing selectable switching voltage type single-stage multi-input low-frequency link inverter is a multi-input single-output high-frequency inverter circuit that combines multiple common-ground input filters and a common output low-frequency isolation transformer filter. Circuit connection structure, each input end of the multi-input single-output high-frequency inverter circuit is connected with the output end of each input filter in one-to-one correspondence, and the output end of the multi-input single-output high-frequency inverter circuit is isolated from the output low frequency The input end of the low-frequency transformer or the output filter inductor of the transformer filter circuit is connected with the non-connected input end of the low-frequency transformer or ...

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Abstract

The invention relates to an external parallel time-sharing selection switch voltage-type monopole multi-input low-frequency link inverter. A circuit structure is formed by connecting a plurality of input filters which are in common ground and a shared output low-frequency isolation transformation filtering circuit through a multi-input and single-output high-frequency inversion circuit of an external parallel time-sharing selection four-quadrant power switch, each input end of the multi-input and single-output high-frequency inversion circuit is connected with an output end of each input filter in one-to-one correspondence, and an output end of the multi-input and single-output high-frequency inversion circuit is connected with an input end of the output low-frequency isolation transformation filtering circuit. The inverter has the characteristics of divided power supply, simple circuit topology, monopole power conversion, high conversion efficiency, small output voltage ripple, wide application prospect and the like, multiple input sources are in common ground, an output and an input are in low-frequency isolation, the output low-frequency transformation 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 external parallel connection time-division selective switching 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) real...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M3/155H02M5/10H02M3/335H02M1/12H02M7/538
CPCH02M1/126H02M3/155H02M3/3353H02M5/10H02M7/538H02M7/5387H02M1/007H02M7/493H02M3/1584H02M3/158H02M3/07H02M1/10H02M7/53871H02M7/53803Y02E10/56H02J3/381H02J2300/24H02J2300/28H02J2300/30H02J2300/40H02M1/0003H02M7/53806H02M7/4826
Inventor 陈道炼曾汉超
Owner QINGDAO UNIV
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