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Arc fault mitigation for photovoltaic systems

A photovoltaic system and arc fault technology, applied in the field of photovoltaic systems, can solve problems such as deterioration of conditions, increase arc path energy, etc., to reduce damage and fire, reduce the risk of electric shock, and effectively and efficiently mitigate arc faults.

Active Publication Date: 2013-09-11
SCHNEIDER ELECTRIC USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these cases, opening the circuit can potentially increase the energy in the arc path, which can make the situation worse
Shorting the output of the solar panel has also been tried, but may cause additional stress on the series arc fault hazard

Method used

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  • Arc fault mitigation for photovoltaic systems
  • Arc fault mitigation for photovoltaic systems
  • Arc fault mitigation for photovoltaic systems

Examples

Experimental program
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Embodiment Construction

[0018] Referring now to the drawings, wherein like reference numerals refer to like parts throughout the several views. figure 1 An exemplary photovoltaic system or device assembly, generally designated 10 , in accordance with various aspects of the present disclosure is shown. A photovoltaic (PV) system 10 includes one or more strings (such as a first 12A, a second 12B, and an Nth 12N string) of PV panels connected in series, each denoted as A 1 -A X , B 1 -B Y , N 1 -N Z . Each string 12A, 12B, . . . 12N is connected to a respective panel feed 14A, 14B, . . . 14N in the combiner box 16 of the first stage. The number of series connected PV panels X in the first string 12A and the number of series connected PV panels Y and Z in the second and Nth strings 12B, 12N may be the same or different. Each PV panel typically includes an array of photovoltaic cells (shown schematically at 26 in panel A1 for reference purposes) that convert solar or other light energy into a corre...

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PUM

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Abstract

Systems, methods, and devices are presented for mitigating arc fault events in a photovoltaic system. An aspect of this disclosure is directed to a photovoltaic system for generating electrical power. The photovoltaic system includes one or more solar panels, and one or more shuttering assemblies, each of which is configured to selectively limit the quantity of light received by one or more of the solar panels. One or more sensing devices detect characteristics of an arc fault event in the photovoltaic system, and output signals indicative thereof. A control module is operatively connected to the shuttering assemblies and the sensing devices. The control module is configured to direct the one or more shuttering assemblies to reduce the quantity of light received by at least one of the one or more solar panels in response to the output signals indicating there is an arc fault event in the photovoltaic system.

Description

technical field [0001] The present invention relates generally to photovoltaic systems, and more particularly to systems, methods and apparatus for mitigating arc faults in photovoltaic systems. Background technique [0002] Photovoltaics is the field of science concerned with the generation of electrical energy by converting light energy into electrical current using conductors that exhibit the photovoltaic (PV) effect. In most PV applications, the light energy is radiation from sunlight, and, for this reason, PV devices are often referred to as solar cells. Photovoltaic power generation typically employs one or more solar panels, each of which includes multiple solar cells. Each solar cell includes a photoemissive material that exhibits a property known as the photoelectric effect, wherein the material absorbs photons of light and reactively emits or ejects them upon exposure to electromagnetic radiation above a certain threshold frequency. electronic. The resulting flo...

Claims

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Application Information

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IPC IPC(8): H02H1/00H01L25/00H01L31/00H02M11/00
CPCH01L31/02021Y02E10/50
Inventor 布雷特·E·拉尔森加里·W·斯科特
Owner SCHNEIDER ELECTRIC USA INC
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