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Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance

A power supply system and converter technology, applied in photovoltaic power generation, AC network circuits, irreversible DC power input conversion to AC power output, etc., can solve the problem of low conversion efficiency of photovoltaic grid-connected converters, and improve conversion efficiency Effect

Inactive Publication Date: 2016-02-17
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a photovoltaic grid-connected converter, a photovoltaic power supply system and electrical appliances to solve the problem of low conversion efficiency of photovoltaic grid-connected converters in the related art

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  • Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance
  • Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance

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[0026] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0028] It should be noted that the terms "first" and "second" in ...

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Abstract

The invention discloses a photovoltaic grid-connected converter, a photovoltaic power supply system and an electric appliance. The photovoltaic grid-connected converter comprises a boosting chopper, a by-pass switch and a conversion circuit, wherein the boosting chopper is connected with a photovoltaic array and used for performing boosting conversion on output voltage of the photovoltaic array, the by-pass switch is connected with the boosting chopper in parallel and used for bypassing the boosting chopper when the output voltage of the photovoltaic array exceeds a preset voltage threshold value, and the conversion circuit is connected with the output end of the boosting chopper and used for performing direct-current and alternating-current conversion on output currents of the boosting chopper. Through the photovoltaic grid-connected converter, the problem that in related technologies, the conversion efficiency of a photovoltaic grid-connected converter is low is solved.

Description

technical field [0001] The invention relates to the field of electrical appliances, in particular to a photovoltaic grid-connected converter, a photovoltaic power supply system and electrical appliances. Background technique [0002] In the development and research of new energy, the AC-DC hybrid microgrid is an important link in the application of new energy. Research on how to build a more efficient and stable AC-DC hybrid microgrid is an inevitable trend in the development of new energy development and application technologies. Among them, the bidirectional DC-AC (AC / DC) converter connects the DC bus and the AC bus, can perform mutual conversion between DC and AC, and also undertakes multiple tasks such as function switching and power transmission. Research on AC / DC converters The high-efficiency operation of the AC-DC hybrid microgrid system is of great significance to improve the reliability and efficiency. In the case of photovoltaic new energy power generation, due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02J3/38
CPCH02J3/385H02M7/48Y02E10/56
Inventor 宋泽琳刘岩钱强
Owner GREE ELECTRIC APPLIANCES INC
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