The invention relates to a series arc fault detection method for alternating current and direct current charging piles of an electric vehicle. The method is technically characterized by comprising the steps of obtaining a misinformation scene feature set W and continuously updating internal data of the misinformation scene feature set W; acquiring a current time frequency signal; extracting feature information for fault detection from the current time-frequency signal; comprehensively determining the current state type of the AC/DC charging pile of the electric vehicle according to the extracted feature information; and traversing feature vectors in the false alarm scene feature set W, calculating extracted feature information and matching the extracted feature information with each feature vector in the false alarm scene feature set W, and if the extracted feature information is not matched with each feature vector in the false alarm scene feature set W, judging that the fault arc is effective, otherwise, performing manual intervention on false alarm. According to the method, the functions of accurate extraction of the current characteristic quantity of the fault arc of the charging pile and fault detection are realized, and the method has the characteristics of high decomposition efficiency, large relative increment of sensitive component characteristics, high fault detection capability and the like.

    本发明涉及一种电动汽车交直流充电桩串联电弧故障检测方法,其技术特点是:获取误报场景特征集W并对其内部数据持续更新;获取电流时频信号;从电流时频信号中提取用于故障检测的特征信息;根据提取的特征信息综合确定电动汽车交直流充电桩的当前状态类型;遍历误报场景特征集W中的特征向量,计算已提取的特征信息并与误报场景特征集W中每个特征向量进行匹配,如果已提取的特征信息与误报场景特征集W中每个特征向量不匹配,则判定故障电弧有效,否则为误报进行人工干预。本发明实现了充电桩故障电弧的电流特征量准确提取及故障检测功能功能,具有分解效率较高、敏感分量特征的相对增量较大、故障检测能力强等特点。


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    Titel :

    Electric vehicle AC/DC charging pile series arc fault detection method


    Weitere Titelangaben:

    电动汽车交直流充电桩串联电弧故障检测方法


    Beteiligte:
    LIU SIHUA (Autor:in) / LIU JIE (Autor:in) / WANG YONG (Autor:in) / XIAO MENG (Autor:in) / WAN LI (Autor:in) / LI ZHIPENG (Autor:in) / XUE TIAN (Autor:in) / LI YUEHAO (Autor:in) / HOU ZHICHAO (Autor:in) / XU WEIXIAO (Autor:in)

    Erscheinungsdatum :

    2024-04-09


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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