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基于感应滤波的工业整流系统潜在谐波放大及防治措施

, PP. 304-317

Keywords: 大功率整流,换流变压器,感应滤波,有源电力滤波器,谐波抑制,无功功率补偿,电能质量

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Abstract:

在高耗能企业中采用12脉波感应滤波技术能有效治理谐波、低功率因数等电能质量问题。但在实际工程应用中,由于系统阻抗参数波动以及变压器、感应滤波装置参数匹配、设计不当等原因,产生低次谐波电流放大的现象,导致感应滤波系统的滤波性能受到影响,严重时会威胁整个感应滤波系统的安全运行。本文从理论上分析了谐波放大现象的机理,建立了系统谐波作用的数学模型,给出了在变压器滤波绕组侧采取混合有源滤波或对无源滤波装置优化设计两种防治谐波放大的方案。该方案在某电解铝企业得到了应用,有效解决了低次谐波放大现象,仿真及工程现场运行验证了理论分析的正确性。

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