An active bypass control device and method for a photovoltaic module

A photovoltaic module and bypass control technology, applied in circuit devices, photovoltaic system monitoring, photovoltaic modules, etc., can solve the problems of low reliability, large system loss, and high cost, and achieve low reliability and avoid large power consumption. Effect

Active Publication Date: 2018-12-21
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology

[0004] The invention provides an active bypass control device and method for photovoltaic modu

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  • An active bypass control device and method for a photovoltaic module
  • An active bypass control device and method for a photovoltaic module
  • An active bypass control device and method for a photovoltaic module

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[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

[0045] See figure 1 , figure 1 It is a schematic diagram of the principle of an active bypass control device for photovoltaic modules provided by an embodiment of the present invention. In this embodiment, the active bypass control device may include: a power supply 50, a sampling unit 40, a controller 10, N first drive circuits 20, and N first controllable switches 30, where N is a positive integer.

[0046] The output terminal of the power supply 50 is conn...

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Abstract

The invention provides a photovoltaic module shutdown device and an active bypass control device and method, The apparatus comprises: a Power supply, a sampling unit, a controller, N first drive circuits and N first controllable switches, N first controllable switches are respectively connected between N pairs of bypass ports, and the first controllable switch comprises a first switch and a firstdiode in reverse parallel, the first diode is inversely connected between the corresponding pair of bypass ports, and the control terminal of the first switch is connected with the controller throughthe corresponding first driving circuit; Based on the sampling signal provided by the sampling unit, the controller judges whether each analog quantity information satisfies a preset bypass condition,If the condition is satisfied, the corresponding first switch is controlled to be turned on by the corresponding first driving circuit to avoid the large power consumption on the first diode in the first controllable switch, thereby solving the problems of low reliability, high cost and large system loss caused by the large power consumption on the diode in the prior art.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an active bypass control device and method for a photovoltaic module. Background technique [0002] In the field of photovoltaic power generation, in order to prevent the hot spot effect of photovoltaic modules, bypass diodes are usually installed in its junction box; when a substring of a photovoltaic module is blocked and the power is insufficient, the current is automatically transferred from the substring to its outside The parallel diode circuit prevents abnormal sub-strings from becoming load heat and does not affect the power generation of other sub-strings. In some component-level products, such as shut-off devices, optimizers, etc., there is also such an application. A diode is connected in parallel with the output port of the photovoltaic module. The remaining photovoltaic modules in the string generate electricity. [0003] The current of conventional photo...

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Application Information

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IPC IPC(8): H02S40/30
CPCH02S40/30Y02E10/50H02S50/10H02J3/388
Inventor 杨宗军俞雁飞倪华
Owner SUNGROW POWER SUPPLY CO LTD
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