Photovoltaic energy storage system and fault recording device
A fault recording device and fault recording technology, applied in the monitoring of photovoltaic systems, photovoltaic modules, circuit devices, etc., can solve the problems of small amount of data and unfavorable fault cause analysis, etc.
Active Publication Date: 2022-02-18
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology
[0004] In view of this, the embodiment of the present invention provides a photovoltaic energy storage system and a fault recording device to solve the problem that the existing technology only records the voltage and current data of the DC side and the AC side of the energy storage converter, and the amount of data obtained is too small , which is not conducive to the problem of failure cause analysis
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[0030] 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.
[0031] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...
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The present invention provides a photovoltaic energy storage system and a fault recording device. The fault recording device is applied to a photovoltaic energy storage system and includes: a first fault recording unit and a second fault recording unit; wherein: the first fault recording The unit is set in the energy storage converter of the photovoltaic energy storage system to store the fault data on the AC and DC side of the energy storage converter; the second fault recorder unit is set in the DC confluence protection cabinet of the photovoltaic energy storage system to use The preset sampling data is received in real time, and when fault data appears in the preset sampling data, the fault data is recorded and stored; wherein, the preset sampling data includes sampling data of each device to be analyzed in the photovoltaic energy storage system. Through the above scheme, fault monitoring within the preset range can be realized for the entire photovoltaic energy storage system; within the preset range, if fault data appears in the preset sampling data, the waveforms of other preset nodes in the photovoltaic energy storage system can be recorded data, increasing the amount of data available for failure analysis.
Description
technical field [0001] The invention relates to the technical field of photovoltaic energy storage systems, in particular to a photovoltaic energy storage system and a fault recording device. Background technique [0002] With the rapid development of photovoltaic energy storage systems, electrochemical energy storage has become the most important solution to solve the problem of new energy consumption, enhance the stability of the power grid, and improve the utilization rate of power distribution systems. It can play an important role in the entire power value chain. It involves every link of sending, transporting, distributing and using. With the increasing proportion of new energy sources such as wind power and photovoltaics in the energy structure, and the rapid decline in the cost of power lithium batteries, the application of electrochemical energy storage in the fields of peak and valley electricity price arbitrage, new energy grid connection, and power system auxilia...
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IPC IPC(8): H02S50/00H02S40/30H02J13/00H02J3/38
CPCH02S50/00H02S40/30Y02E10/50Y04S10/123Y02E40/70
Inventor 洪婷婷曹伟余勇孙德亮
Owner SUNGROW POWER SUPPLY CO LTD