The invention belongs to the field of electric power, and particularly relates to a power grid harmonic distortion processing method. The method comprises the following steps of: step 1, inputting data: signals of each charging pile is input; step 2, obtaining effective data: when enough data is collected, the data is the effective data; step 3, fitting a transition matrix; step 4, performing prediction: prediction is conducted through the transition matrix; step 5, performing Taylor expansion: Taylor expansion is performed on each charging pile signal obtained in the step 4 to obtain multipleharmonics of which the harmonic frequency does not exceed 32 orders; and step 6, judging: the harmonics of the same order of the charging piles of different serial numbers are accumulated to obtain total harmonics, the total harmonics are compared with a preset required threshold of the charging piles, if an accumulated value is within a threshold requirement range, normal charging is continued,and if the accumulated value exceeds the threshold requirement range, an alarm is given out. The method has the advantages that risks are avoided in advance, and safety is improved.

    本发明属于电力领域,具体涉及一种电网谐波畸变处理方法。它包括:步骤1:数据输入,输入每路充电桩的信号;步骤2:取有效数据,当采集的数据足够多时,为有效数据;步骤3:拟合过渡矩阵;步骤4:预测,用过渡矩阵进行预测;步骤5:泰勒展开,对步骤4得到的每个充电桩信号进行泰勒展开,得到多次谐波,谐波次数不超过32阶,步骤6:判断,将不同序号充电桩的同一阶次谐波累加,得到总谐波,将该谐波与充电桩预设要求阈值比较,若累加值在阈值要求范围内,则继续正常充电,若累加值超过阈值要求范围,则发出警报。本发明显著效果是:提前规避风险,提高安全性。


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    Title :

    Power grid harmonic distortion processing method


    Additional title:

    一种电网谐波畸变处理方法


    Contributors:
    SUI SHUFA (author) / YANG ZHEN (author) / SU YONGYI (author) / GONG GU (author) / XUE LUN (author) / YUAN ZHEN (author) / LIU TAO (author) / CAO YANG (author) / PAN MING (author)

    Publication date :

    2020-12-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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    Solution to high harmonic distortion

    Emerald Group Publishing | 2001


    Indirect measurement of total harmonic distortion

    Danstrom,E. / SGS-THOMSON Microelectronics,US | Automotive engineering | 1990