Fault detection method of safety device and photovoltaic power generation system
A photovoltaic power generation system and safety device technology, which is applied in the fault detection of safety devices and photovoltaic power generation systems, can solve problems such as personal safety hazards and components cannot be shut down, and achieve the effect of improving safety performance
Active Publication Date: 2020-01-21
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology
[0005] However, the inventor found that if the shutdown function fails, the components will not be able to shut down, which will cause personal safety hazards. Therefore, it is necessary to provide a fault detection method for a safety device to ensure that an alarm is issued when the safety device itself fails. A major technical problem to be solved urgently by those skilled in the art
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[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0044] see figure 1 , figure 1 It is a schematic flowchart of a fault detection method for a safety device provided in an embodiment of the present invention. The fault detection method is applied to a photovoltaic power generation system and includes steps:
[0045] S11. Obtain a trigger instruction for self-inspection of the safety device, and control the safety device to be in a working state.
[0046] Wherein, the trigger instruction of the safety device...
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The invention provides a fault detection method of a safety device and a photovoltaic power generation system. The fault detection method is applied to the photovoltaic power generation system. Firstly a triggering instruction of automatic examination of the safety device is obtained, the safety device is controlled to be in a closed state, then whether input end voltage and output end voltage of the safety device meet a first preset condition or not is judged, and if not, alarm information is sent; if yes, the safety device is controlled to be in a closed state; whether the input end voltage and the output end voltage of the safety device meet a second preset condition or not is judged, and if yes, it is determined that the safety device is in a state that a fault does not occur. As can be seen, the safety device can conduct the automatic examination, when the fault occurs, the alarm information is sent, a user is alarmed, and the safety performance of a photovoltaic inverter system is improved.
Description
technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a fault detection method of a safety device and a photovoltaic power generation system. Background technique [0002] Against the background of increasing global energy demand, high prices of traditional energy sources and increasing attention to environmental issues, the global photovoltaic industry and solar energy market are growing rapidly. [0003] Photovoltaic power generation has become a part of the national energy structure, and its proportion will gradually increase. However, with the continuous expansion of the photovoltaic industry, the probability of accidents is also increasing. [0004] Specifically, the photovoltaic arrays connected in series have a high voltage. In order to improve the safety of the photovoltaic system, it is necessary to install safety devices (SD, Safe device) in the photovoltaic power generation system, such as fast shutdown equipm...
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IPC IPC(8): H02S50/00
CPCH02S50/00Y02E10/50
Inventor 杨宗军邹云飞俞雁飞詹亮倪华
Owner SUNGROW POWER SUPPLY CO LTD