Rapid cutoff system of photovoltaic module and restarting method after cutoff

A photovoltaic module, a fast technology, applied in the direction of photovoltaic power generation, single-network parallel feeding arrangement, etc., can solve the problems of photovoltaic power generation system failure, photovoltaic inverter AC and DC power supply system, restart, etc.

Active Publication Date: 2019-05-21
FONRICH NEW ENERGY TECH LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The shutdown device in the prior art has the following unavoidable defects: when the photovoltaic power generation system is an off-grid system, after the photovoltaic power generation system executes the shutdown command, it w...

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  • Rapid cutoff system of photovoltaic module and restarting method after cutoff
  • Rapid cutoff system of photovoltaic module and restarting method after cutoff
  • Rapid cutoff system of photovoltaic module and restarting method after cutoff

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Embodiment Construction

[0077] Below in conjunction with each embodiment, the technical solution of the present invention is clearly and completely set forth, but described embodiment is only the embodiment that the present invention is used for describing description and not all embodiments, based on these embodiments, this invention The solutions obtained by those skilled in the art without creative work all belong to the protection scope of the present invention.

[0078] In the field of photovoltaic power generation, photovoltaic modules or photovoltaic cells are the core components of power generation. Solar panels are divided into monocrystalline silicon solar cells, polycrystalline silicon solar cells, amorphous silicon solar cells, etc. in the direction of mainstream technology. The required service life of silicon cells is as high as more than 20 years. monitoring is essential. Many internal and external factors can lead to low power generation efficiency of photovoltaic modules: manufactur...

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Abstract

The invention mainly relates to a rapid cutoff system of photovoltaic module and a restarting method after cutoff. The rapid cutoff system comprises a cutoff control module, a plurality of cutoff devices and a plurality of photovoltaic modules, wherein a plurality of photovoltaic modules are connected in series to form a battery pack, respective output voltages are superposed to obtain a DC bus voltage, and each cutoff device is used for removing the corresponding photovoltaic module from the battery pack so as to cut off or restoring from a cutoff state to a series connection state. When a cutoff command is received by the cutoff control module, a first instruction is send out to the plurality of cutoff devices so as to inform the plurality of cutoff devices to cut off the corresponding photovoltaic modules, or when a starting command is received by the cutoff control module, a second instruction is sent out to the plurality of cutoff devices so as to inform the plurality of cutoff devices to restore the corresponding photovoltaic modules from the cutoff states to the series connection states.

Description

technical field [0001] The present invention mainly relates to the technical field of photovoltaic power generation, and to be precise, relates to a system in which series-connected multi-level photovoltaic modules can be quickly shut down, and a restart scheme after the series-connected multi-level photovoltaic modules are shut off. Background technique [0002] Photovoltaic power generation systems belong to the high-voltage field in power electronic systems. Based on safety considerations, the National Fire Protection Association has amended the National Electrical Code to require that in residential photovoltaic power generation systems: when an emergency occurs, the maximum voltage at the DC terminal must not exceed 80 volts after the AC grid-connected port of the photovoltaic power generation system is disconnected. Italian safety codes warn that firefighters should not operate to extinguish a fire if the building is live. Germany takes the lead in implementing fire...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCY02E10/56
Inventor 张永胡晓磊
Owner FONRICH NEW ENERGY TECH LTD
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