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电网技术  2011 

基于非对称规则采样策略的变换器传导干扰预测

, PP. 208-212

Keywords: 非对称规则采样,共模,差模,噪声源,频域分析

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Abstract:

提出了非对称规则采样策略下的变换器差模和共模干扰源预测模型,使用频域计算的方法推导了2种干扰源的频谱;总结了差模、共模干扰在变换器开关频率及其倍数频率附近的分布规律,从而对比研究了不同调制比下2种干扰的变化关系,得到了相应的变化规律。在此基础上,利用Saber软件对一个三相整流器系统的传导干扰进行了时域仿真和频域验证,仿真试验验证了理论预测的正确性。该方法可有效推广到逆变器干扰源的分析预测中。

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