Rapid switch-off system applied to photovoltaic generation

A photovoltaic power generation, fast technology, applied in the direction of photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve the problems of inability to provide safety system, easy failure of semiconductor switches, low safety performance, etc., to reduce accidents, safety and stability High effect of ensuring personal safety

Inactive Publication Date: 2017-12-01
JIANGSU TONGLIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still a danger of electric shock when personnel contact and overhaul, and the safety performance is low
Assuming that the shutdown device is a semiconductor switch, the semiconductor switch is prone to failure when encountering high temperature, which cannot provide security for the system

Method used

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  • Rapid switch-off system applied to photovoltaic generation
  • Rapid switch-off system applied to photovoltaic generation
  • Rapid switch-off system applied to photovoltaic generation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 1-2 As shown, the fast shutdown photovoltaic junction box 5 includes a normally open contact one 51 and a magnet wire package one 52, the magnet wire package one 52 is connected to the power converter 421, and the moving contact of the normally open contact one 51 The fixed contacts of the first and normally open contacts are respectively connected to adjacent photovoltaic modules.

[0032] When the photovoltaic module array is generating electricity normally, both the power converter and the magnet wire package 1 are energized, the normally open contact associated with the magnet wire package 1 moves, and the normally open contact closes, so that each photovoltaic module is connected in series to form a photovoltaic module array. Realize the power generation function. When a fault occurs and needs to be repaired or an open circuit accident occurs due to force majeure, the main gate is disconnected, the power converter and the electromagnetic wire packag...

Embodiment 2

[0034] Such as Figure 3-4 As shown, the fast shutdown photovoltaic junction box 5 is integrally manufactured with the photovoltaic module 1, and the photovoltaic module 1 includes a power generation component 11 and a bypass diode module 12 connected in parallel to the power generation component;

[0035] The fast shutdown photovoltaic junction box 5 includes a normally open contact 2 53 and a magnetic wire package 2 54, the normally open contact 2 is respectively connected to the adjacent bypass diode module, and the magnetic wire package 2 is connected to the power supply converter. The wiring can be further simplified, the volume of the whole device can be reduced, and the installation and use are convenient.

Embodiment 3

[0037] Such as Figure 5-6 As shown, the fast shutdown photovoltaic junction box 5 includes a normally open contact three 55, a magnet wire package three 56 and a normally closed contact 57, and the normally open contact three 55 and the normally closed contact 57 are connected to the magnet wire package Three 56 linkage;

[0038] The electromagnetic wire package 3 is connected to the power converter, the moving contact of the normally open contact 3 and the static contact of the normally open contact 3 are respectively connected to adjacent photovoltaic modules, and one end of the photovoltaic module is connected to the ground terminal. There is a normally closed contact between the photovoltaic module and the ground terminal. When the photovoltaic modules generate power normally, the power converter is powered on, and the electromagnetic wire pack three is also powered on. The normally open contact three and the normally closed contact act, and the normally open contact thr...

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PUM

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Abstract

The invention provides a rapid switch-off system applied to photovoltaic generation, relates to the field of photovoltaic generation, and specifically relates to a rapid switch-off system with high security and reliability and applied to photovoltaic generation. The rapid switch-off system is connected to a photovoltaic module array in series and comprises rapid switch-off photovoltaic junction boxes, the photovoltaic module array comprises a plurality of photovoltaic modules, the plurality of photovoltaic modules are connected in series and conveyed to an alternating current power grid through a combiner / inversion box, an alternating current distribution system is arranged between the alternating current power gird and the combiner / inversion box, the rapid switch-off photovoltaic junction boxes are connected in series between the adjacent photovoltaic modules and used for switching off the photovoltaic modules, the alternating current distribution system comprises a main switch and a slave switch, the main switch is arranged between the alternating current power grid and the combiner / inversion box, the slave switch comprises a power supply converter, a manual switch and an automatic switch, the automatic switch and the manual switch are separately connected with the power supply converter, and the power supply converter is connected with the rapid switch-on photovoltaic junction boxes. The system is advantaged by high security and good stability.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a fast shutdown system applied to photovoltaic power generation. Background technique [0002] Photovoltaic power generation has been widely used nowadays, but there is a problem that more and more troubles people, that is, when the photovoltaic power station system fails and needs to be repaired, or when there is an earthquake, fire, flood, etc. and rescue personnel need to enter, even if Shut off the grid power supply, because the photovoltaic modules are still generating electricity, there is still high-voltage electric energy in the system that may endanger human safety. [0003] For this reason, the 2017NEC690.12 photovoltaic system safety standard stipulates that personnel should enter the safety limit, requiring that the voltage of accessible components should drop below 80V within 10 seconds. This requires us to provide a component-level quick shutdown device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/34H02J3/38
CPCH02S40/34H02J2300/24Y02E10/56
Inventor 严荣飞姚圣杰
Owner JIANGSU TONGLIN ELECTRIC
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