一种逆变器母线纹波主动抑制方法及系统

By collecting inverter bus voltage and current, constructing a physical degradation model, identifying the sensitive frequency band of electrolytic capacitors, and building a frequency-varying virtual impedance network, the problem of capacitor aging in inverter bus ripple suppression is solved, thereby extending capacitor life and reducing losses.

CN122092657BActive Publication Date: 2026-07-17JINLANG ENERGY STORAGE CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JINLANG ENERGY STORAGE CO LTD
Filing Date
2026-04-22
Publication Date
2026-07-17

Smart Images

  • Figure CN122092657B_ABST
    Figure CN122092657B_ABST
Patent Text Reader

Abstract

本申请公开了一种逆变器母线纹波主动抑制方法及系统；方法步骤：采集母线电压和电流，提取宽频纹波频谱；将宽频纹波频谱以及逆变器的运行数据输入物理退化模型，对电解电容的寿命状态进行预测；通过预测的电解电容的寿命状态，构建动态的频率耐受度阈值矩阵，并识别出电解电容的敏感频段；对各敏感频段进行威胁度评估，并根据评估结果构建用于反演补偿电压参考指令的频变虚拟阻抗网络；根据生成的补偿电压参考指令，驱动逆变器功率开关管产生相应的补偿电压。系统用于实施上述的方法。本申请的有益效果：本申请将纹波抑制转化为“电容物理阻抗退化量”与“逆变器虚拟阻抗补偿量”在的动态互补问题，大幅提升逆变器系统的可靠性与经济性。
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Method for estimating working life of capacitor

    CN102590660A

  • Ripple analysis-based electrolytic capacitor life calculation method

    CN106126876A