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大功率整流系统谐波功率特性及其对电能计量的影响和节能分析

, PP. 248-255

Keywords: 直流供电系统,基波电能计量,谐波功率,节能

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Abstract:

为解决现有大功率整流系统在计及谐波情况下电能计量及节能等方面遭遇的现实问题,本文对谐波功率特性及其对系统电能计量与效率的影响进行了研究。首先介绍了基波电能计量方案,以三相整流电路为例,研究了功率流向及功率计算,并探讨了电源含与不含谐波情形下系统总有功功率与基波功率的关系。其后,研究了无滤波、网侧滤波及感应滤波下谐波功率的特点及其对系统电能质量与效率的影响。仿真与工程试验结果表明谐波是由基波转化而来,其回送功率必然引起总功率与基波功率的不平衡;感应滤波方式在谐波抑制、减小系统谐波损耗及节能方面具有优势。

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