A photovoltaic module shutdown device

A photovoltaic module and switch technology, which is applied in the field of photovoltaic module shutdown devices, can solve the problems of large loss and high cost, and achieve the effect of avoiding high cost and avoiding large loss.

Active Publication Date: 2018-12-21
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a photovoltaic module shut-off device to solve the problems of large loss and high cost in the prior art

Method used

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  • A photovoltaic module shutdown device
  • A photovoltaic module shutdown device
  • A photovoltaic module shutdown device

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0048] The invention provides a photovoltaic module shutdown device, which is used to realize the output shutdown function of the connected photovoltaic module and simultaneously solve the problems of large loss and high cost in the prior art.

[0049] See figure 2 , the shut-off device of the photovoltaic module includes: a controller and an execution device combination, and the execution device combination includes: a first switch Q1, a second switch Q2, a first drive unit, a second driv...

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Abstract

The invention provides a shutdown device of a photovoltaic module, wherein only a first switch is serially connected in an output loop of the photovoltaic module, and the controller controls the firstswitch to be closed in a normal power generation state and to be opened in a shutdown state. If the first switch has a short circuit fault, the controller will control the second switch connected inparallel with the photovoltaic module to close, thereby shorting the output of the photovoltaic module to ensure reliable shutdown; The second switch is in an open state when the photovoltaic module output normally, the output of the photovoltaic module does not bring loss, so the device with low impedance is not required to be selected, and the problems of large loss and high cost in the prior art are avoided.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a shutdown device for a photovoltaic module. Background technique [0002] Photovoltaic power generation technology, as a renewable energy power generation technology, has been widely used at home and abroad. The photovoltaic array outputs direct current, which is converted into alternating current by the inverter, and clean energy can be transmitted to the grid. However, with the continuous expansion of the photovoltaic industry, the probability of accidents is also increasing. The photovoltaic arrays connected in series have a very high voltage. In order to improve the safety of the photovoltaic system, in the prior art, a shutdown device is usually added to each photovoltaic module, or an intelligent junction box with a shutdown function is integrated on the photovoltaic module. [0003] Such as figure 1 As shown, the shut-off circuits in the above two devices main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02H7/12
CPCH02J3/383H02H7/1213H02S50/00H02H7/20H02S40/36G01R31/50
Inventor 杨宗军俞雁飞倪华
Owner SUNGROW POWER SUPPLY CO LTD
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