Photovoltaic energy storage system and fault recording device

A fault recording device and fault recording technology, which are applied in the monitoring of photovoltaic systems, photovoltaic power generation, photovoltaic modules, etc., can solve the problems of less data and unfavorable fault cause analysis, etc.

Active Publication Date: 2019-11-01
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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  • Photovoltaic energy storage system and fault recording device
  • Photovoltaic energy storage system and fault recording device
  • Photovoltaic energy storage system and fault recording device

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Embodiment Construction

[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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Abstract

The invention provides a photovoltaic energy storage system and a fault recording device. The fault recording device is applied to a photovoltaic energy storage system. The fault recording device comprises a first fault recording unit and a second fault recording unit, wherein the first fault recording unit is arranged in an energy storage converter of a photovoltaic energy storage system and is used for storing fault data at the AC-DC side of the energy storage converter; and the second fault recording unit is arranged in the DC confluence protection cabinet of the photovoltaic energy storagesystem and is used for receiving preset sampling data in real time and recording and storing the fault data when the preset sampling data has fault data, wherein the preset sampling data comprises the sampling data of each device to be analyzed in the photovoltaic energy storage system. According to the scheme, the fault monitoring in the preset range for the whole photovoltaic energy storage system can be achieved; and moreover, in the preset range, if the preset sampling data has the fault data, the waveform data of other preset nodes in the photovoltaic energy storage system can be recorded, and the data volume for fault analysis is increased.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
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