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Wiring box

By designing a junction box in the solar power supply system and using diode series connection and control of switching elements, the safety problem of solar module power supply to the DC bus under abnormal conditions is solved, and the safety management and fault location of the solar system are realized.

Inactive Publication Date: 2012-03-21
AMLINK SHANGHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the solar power supply system is abnormal, the solar module still supplies power to the DC bus, that is, the DC bus is still charged, which will bring the danger of electric shock to the operator

Method used

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Embodiment Construction

[0044] figure 1 It is a schematic diagram of a solar power supply system 10 in an embodiment of the present invention. Such as figure 1 As shown, the solar power supply system 10 includes a plurality of solar modules 20 , a DC bus 30 , a DC switch box 40 , an inverter 50 , an AC switch box 60 , an electric meter 70 and a control device 80 . In this embodiment, the solar module 20 includes a plurality of photovoltaic cell groups 22 and junction boxes 21 connected in series, such as figure 2 shown. The photovoltaic cell group 22 is used to convert solar energy into direct current, and the direct current generated by other solar modules 20 is connected in series with each other through the junction box 21 and then output to the direct current bus 30 . The control device 80 is used to control the solar module 20 , the DC switch box 40 , the converter 50 and the electric meter 70 . The DC switch box 40 is connected between the DC bus 30 and the converter 50 , and is closed or ...

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Abstract

The invention discloses a wiring box; the wiring box is connected with multiple serially connected photoelectric cell units, and communicates with control equipment. The wiring box comprises multiple diodes, two interfaces, a switch element and a communication module; the multiple diodes are connected with the photoelectric cell units in parallel one by one, and connected with each other in series to form a diode string; the two interfaces are respectively connected with the two ends of the diode string and the photoelectric cell units, and used for outputting direct current from the photoelectric cell group; the switch element is connected between the diode string and the interfaces; the communication module is connected with the switch element, and used for receiving a control signal from the control equipment to control the closing or opening of the switch element, so as to control whether the interface outputs the direct current or not. The wiring box controls the closing or opening of the switch element by the control signal of the control equipment, so as to control whether to output the direct current or not. The management of the wiring box is convenient and the safety is ensured.

Description

technical field [0001] The invention relates to a solar energy system, in particular to a junction box. Background technique [0002] In a solar power supply system, usually a number of photovoltaic cells are connected in series to form a solar module with a certain voltage, and then several solar modules are connected in series, and the series connected solar modules are connected to a DC bus for power supply. When the solar power supply system is abnormal, the solar module still supplies power to the DC bus, that is, the DC bus is still charged, which will bring the danger of electric shock to the operator. Contents of the invention [0003] In view of this, a safe junction box needs to be provided. [0004] A junction box is connected with a plurality of photovoltaic cell groups in series and communicates with a control device, the junction box includes a plurality of diodes, two interfaces, a switch element and a communication module. A plurality of diodes are connec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048
CPCH04B3/548H01L31/05H04B2203/547H01H23/143Y02E10/563H02J1/10G08C17/02H04B2203/5458H01L31/02021H02J3/383H04B3/54H02J2300/24H02J3/381Y02E10/56H02J3/46H10F77/955H10F19/70H10F19/90
Inventor 洪宗良葛炽昌
Owner AMLINK SHANGHAI
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