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Photovoltaic panel fault detection and fault self-shielding protection circuit and detection method thereof

A fault detection and protection circuit technology, applied in photovoltaic power generation, photovoltaic system monitoring, photovoltaic modules and other directions, can solve the problems of photovoltaic panel hot spot effect, reduction of light energy utilization efficiency, damage to photovoltaic modules themselves, etc., to improve manual detection The effect of speed and productivity

Pending Publication Date: 2018-06-29
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common arrangement and combination method is the series-parallel structure of each photovoltaic panel. When a photovoltaic panel in a series branch fails, the cause of the failure may be the damage of the photovoltaic module itself caused by long-term use or the hot spot effect of the photovoltaic panel.
In this case, the faulty photovoltaic panel is equivalent to a large resistance state. Under this condition, other unfailed photovoltaic panels in the series branch cannot work normally through the series circuit, and the efficiency of light energy utilization is reduced.

Method used

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  • Photovoltaic panel fault detection and fault self-shielding protection circuit and detection method thereof
  • Photovoltaic panel fault detection and fault self-shielding protection circuit and detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A photovoltaic panel fault detection and fault self-shielding protection circuit, such as figure 1 shown, including the LED L 1 , fixed resistance R 1 , Diode D 1 , LED L 2 and current limiting resistor R 3 ; The light-emitting diode L 1 with adjustable resistor R 2 After parallel connection with resistor R 1 connected in series, and finally connected in parallel at both ends of the faulty photovoltaic panel; the light-emitting diode L 2 with adjustment resistor R 3 After series connection with diode D 1 Connect in parallel, and then connect in parallel at both ends of the solar photovoltaic panel.

[0043] The solar photovoltaic panel circuit includes a first photovoltaic panel 1 , a second photovoltaic panel 2 and a third photovoltaic panel 3 connected in series in sequence;

[0044] Among them, the second photovoltaic panel 2, the third photovoltaic panel 3 and the light emitting diode L 1 The connection of the three is the A node;

[0045] The second pho...

Embodiment 2

[0052] A photovoltaic panel fault detection and fault self-shielding protection circuit, such as figure 2 shown, including the LED L 1 , fixed resistance R 1 , adjustable resistance R 2 , Diode D 2 , LED L 3 and resistor R 4 ; The light-emitting diode L 1 with adjustable resistor R 2 After parallel connection with resistor R 1 connected in series, and finally connected in parallel at both ends of the faulty photovoltaic panel; the light-emitting diode L 3 with resistor R 4 in parallel with the diode D 2 Connect in series, and then connect in parallel at both ends of the faulty photovoltaic panel.

[0053] Among them, the second photovoltaic panel 2, the third photovoltaic panel 3 and the light emitting diode L 1 The connection of the three is a node;

[0054] The second photovoltaic panel 2, light emitting diode L 1 and diode D 2 The junction of the three is node b;

[0055] LED L 1 and diode D 2 The connection of is the c node;

[0056] LED L 3 , Diode D ...

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Abstract

The invention discloses a photovoltaic panel fault detection and a fault self-shielding protection circuit and detection method thereof. The circuit comprises a light emitting diode L1 which is serially connected with a resistor R1 and is parallelly connected to two ends of a fault photovoltaic panel; the circuit further comprises a light emitting diode L2 and a light emitting diode L3, the lightemitting diode L2 is serially connected with an adjusting resistor R3 prior to be parallelly connected with a diode D1 and further parallelly connected to two ends of a solar photovoltaic panel; or the light emitting diode L3 is parallelly connected with a resistor R4 prior to being parallelly connected with a diode D2 and further parallelly connected to two ends of the fault photovoltaic panel. By the arrangement, fault is detected, and the photovoltaic panel serially connected with the fault photovoltaic panel can be assuredly used; during manual repair or replacement of the photovoltaic panels, photovoltaic panel serial connection branches can run normally, and manual detection speed and working efficiency are increased.

Description

technical field [0001] The invention belongs to the technical field of circuit design, and in particular relates to a photovoltaic panel fault detection and fault self-shielding protection circuit and a detection method. Background technique [0002] Solar cell modules are combined in a certain arrangement to better collect light energy for power generation and improve light energy utilization. The common arrangement and combination method is the series-parallel structure of each photovoltaic panel. When a photovoltaic panel in a series branch fails, the cause of the failure may be the damage of the photovoltaic module itself caused by long-term use or the hot spot effect of the photovoltaic panel. In this case, the faulty photovoltaic panel is equivalent to a state of high resistance. Under this condition, other photovoltaic panels that have not failed in the series branch cannot work normally through the series circuit, and the efficiency of light energy utilization is red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/30H02S50/10
CPCH02S40/30H02S50/10Y02E10/50
Inventor 海涛李俊杰时雨刘振语陈永鉴易丐周楠皓李晖周明雨曹先省
Owner GUANGXI UNIV