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Fault determination method, device and equipment for DC charging pile

A technology of DC charging piles and determination methods, applied in charging stations, electric vehicle charging technology, power supply testing, etc., can solve problems such as the inability to judge internal potential hidden dangers, avoid major accidents, and be economical and safe. The effect of improving judgment accuracy

Active Publication Date: 2022-08-02
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

[0004] In view of this, the present invention provides a fault determination method, device and equipment for DC charging piles, which are used to overcome the technical problem that the charging pile fault method in the prior art cannot judge internal potential hidden dangers

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  • Fault determination method, device and equipment for DC charging pile
  • Fault determination method, device and equipment for DC charging pile
  • Fault determination method, device and equipment for DC charging pile

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Embodiment Construction

[0059] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0060] In order to describe the present invention in more detail, a method, device and equipment for determining a fault of a DC charging pile provided by the present invention will be specifically described below with reference to the accompanying drawings.

[0061] figure 1 It is a schematic flowchart of the fault determination method of the DC charging pile in one embodiment of the present invention, as shown in figure 1 As shown, the method for determining the fault of the DC charging pile disclosed in the embodime...

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Abstract

The invention provides a fault determination method, device and equipment for a DC charging pile. The method includes the following steps: acquiring the output voltage waveform, the output current waveform of the DC charging pile, the initial temperature of the DC charging pile socket before charging, and the DC charging during charging. The charging temperature of the pile socket; the FFT algorithm is used to analyze the output voltage waveform and output current waveform, and the amplitude of each harmonic component of the voltage, the amplitude of the voltage DC component, the amplitude of each harmonic component of the current, and the current DC component are calculated. Calculate the voltage waveform distortion rate and current waveform distortion rate; calculate the temperature rise of the charging pile socket according to the charging temperature and initial temperature; determine the fault of the DC charging pile according to the voltage waveform distortion rate, current waveform distortion rate and temperature rise. The fault determination method of the DC charging pile uses the dual criteria of the DC signal waveform distortion rate and the temperature, which improves the judgment accuracy and reduces or avoids the occurrence of major accidents.

Description

technical field [0001] The invention relates to the technical field of fault prediction, in particular to a fault determination method, device and equipment for a DC charging pile. Background technique [0002] In August 2019, the National Big Data Alliance for New Energy Vehicles released the "Report on Big Data Safety Supervision Results of National Supervision Platform for New Energy Vehicles". A total of 79 safety accidents involving 96 vehicles were found on the national supervision platform for new energy vehicles. In the early morning of April 28, 2020, a vehicle fire and explosion occurred at the Shenzhen Tangwei new energy vehicle charging station. A total of 5 new energy vehicles were damaged to varying degrees at the scene. As the number of new energy vehicles continues to grow, the number of DC charging piles (also known as off-board DC charging piles) is increasing. In order to achieve fast charging, the power and charging current of the DC charging pile are a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/40B60L53/62
CPCG01R31/40B60L53/60B60L53/62Y02T90/12
Inventor 肖勇曾勇刚林晓明王吉胡珊珊钱斌王宗义
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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