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Multi-input-assembly-stage quick turn-off device and drive circuit thereof, and photovoltaic system

A driving circuit and multi-input technology, which is applied in the direction of output power conversion device, photovoltaic power generation, control/regulation system, etc., can solve the problems of application limitation, product size, driving power cost and unfavorable life, and achieve the goal of life and volume improvement Effect

Pending Publication Date: 2018-04-20
CSI CELLS CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of isolated power supply windings will involve transformers and multiple isolated power supply drive windings in the transformers. Therefore, such a structural arrangement has a very negative impact on the size of the product, the cost and life of the drive power supply, so it is important for The application of peripheral DC-DC products with a warranty of 25 years is subject to certain restrictions

Method used

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  • Multi-input-assembly-stage quick turn-off device and drive circuit thereof, and photovoltaic system
  • Multi-input-assembly-stage quick turn-off device and drive circuit thereof, and photovoltaic system

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Embodiment Construction

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] Please refer to Figure 1 to Figure 2 As shown, the present invention discloses a photovoltaic system, which includes n groups of photovoltaic modules connected in series, where n is greater than or equal to 2. Each group of photovoltaic modules has an input positive pole PVn+ and an input negative pole PVn-. In the photovoltaic system, a multi-input component-level rapid shutdown device 100 is also included.

[0019] see figure 1 As shown, the multi-input component-level rapid shutdown device 100 includes a control unit ...

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Abstract

The invention provides a multi-input-assembly-stage quick turn-off device and a drive circuit thereof, and a photovoltaic system. The photovoltaic system comprises a plurality of groups of photovoltaic assemblies connected in series. The quick turn-off device is composed of a control unit, a driving circuit connected to the control unit, an auxiliary power supply for supplying the control unit with power, and a plurality of driving switches. Each driving switch is connected between the photovoltaic assembly and the drive circuit correspondingly. One end of the auxiliary power source is grounded and the other end is connected to an input positive pole of the first photovoltaic assembly group. The drive circuit stabilizes the voltages of the photovoltaic assemblies to be at 12 volts by a resistor and a voltage-regulator diode; and then the corresponding driving switches are driven to realize connection or disconnection of the driving switches. Compared with the prior art, the quick turn-off device has the following beneficial effects: with the non-isolated power supply voltage-stabilization type driving circuit, no power winding and transformer need to be isolated, so that the cost is lowered, the service life is prolonged, and the size is reduced.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a multi-input component-level rapid shutdown device, a driving circuit thereof, and a photovoltaic system. Background technique [0002] In multi-input photovoltaic module-level monitors and fast shutdown devices, the drives of several switches that are not shared with the auxiliary power supply are generally driven by isolated power supply windings and optocoupler drive methods. However, the use of isolated power supply windings will involve transformers and multiple isolated power supply drive windings in the transformers. Therefore, such a structural arrangement has a very adverse impact on the size of the product, the cost and life of the drive power supply, so it is important for The application of peripheral DC-DC products with a warranty of 25 years is subject to certain restrictions. Contents of the invention [0003] The object of the present invention is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/092H02M3/158
CPCH02M1/092H02M3/1584H02M1/0083Y02E10/56
Inventor 季新丰崔利广张俊吴亮
Owner CSI CELLS CO LTD
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