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A shut-down apparatus for a string of photovoltaic panels

A photovoltaic panel and shutdown signal technology, applied in the field of photovoltaic power stations, can solve safety issues and other issues

Inactive Publication Date: 2019-09-24
MARICI HLDG THE NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another disadvantage of this technical solution is that despite the intervention of the shut-off device, some photovoltaic panels may not be de-energized if for some reason (for example, due to a fault) there is an interruption of the electrical connection between the photovoltaic panels
It is easy to understand that this situation may cause related safety problems for operators involved in photovoltaic power plants

Method used

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  • A shut-down apparatus for a string of photovoltaic panels
  • A shut-down apparatus for a string of photovoltaic panels
  • A shut-down apparatus for a string of photovoltaic panels

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Embodiment Construction

[0032] With reference to the above figures, the invention relates to a shut-off device 1 for a string 100 of photovoltaic panels in a low-voltage photovoltaic power plant 500 for generating electricity.

[0033] For clarity, the term "low voltage" is specified to mean operating voltages below 1 kV AC and 1.5 kV DC.

[0034] refer to figure 1 , the photovoltaic power plant 500 comprises a DC part 600 comprising one or more strings 100 of photovoltaic panels and at least one DC bus 601 electrically connected to the strings of photovoltaic panels.

[0035] The photovoltaic power plant 500 also includes an inverter section 700 including a DC / AC main switching converter electrically connected to the direct current bus 601 and a DC / AC conversion for managing the direct current power provided by the photovoltaic panels other equipment.

[0036] The photovoltaic power plant 500 additionally includes an AC section 800 including an AC bus 801 electrically connected to the inverter sec...

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Abstract

A shut-down apparatus (1) for a string (100) of photovoltaic panels (SL1, SL2, SLN-1, SLN) electrically connected in series characterized in that it comprises a plurality of control modules (MD1, MD2, MDN-1, MDN) comprising: an initial control module (MD1) operatively associated to a corresponding photovoltaic panel (SL1);one or more intermediate control modules (MD2, MDN-1), each operatively associated to a corresponding photovoltaic panel (SL2, SLN-1); a final control module (MD) operatively associated to a corresponding photovoltaic panel (SL).Each control module is adapted to cause the shut-down of a corresponding photovoltaic panel in response to a received input shut-down signal (C1, C2, CN-1, CN), said control modules sequentially receiving said input shut-down signals at subsequent shut-down instants, each pair of subsequent shut-down instants being separated by a corresponding time delay (Td).

Description

technical field [0001] The invention relates to the field of photovoltaic power plants for generating electricity. More specifically, the present invention relates to a shutdown device for controlling the shutdown operation of a string of photovoltaic panels electrically connected in series with each other. Background technique [0002] As known, a photovoltaic power plant generally comprises a DC part, an inverter part and an AC part. [0003] The DC section comprises one or more strings of photovoltaic panels formed of a plurality of photovoltaic panels electrically connected in series, and a DC bus electrically connecting such a string of photovoltaic panels in parallel with the DC side of the inverter section. [0004] The AC section includes an AC bus that electrically connects the AC side of the inverter section to an AC grid, such as a distribution grid, and other equipment for managing the transfer of AC power provided by the inverter section. [0005] The inverter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/383H02S50/00Y02E10/56H02S40/32H02S40/34H02M1/36H02J3/38
Inventor S·玛瑟里尼
Owner MARICI HLDG THE NETHERLANDS BV