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电网技术  2010 

基于多倍频旋转坐标正交变换的三相四线制电路谐波检测方法

, PP. 87-93

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Abstract:

谐波检测是电力系统谐波分析和控制的重要基础。提出了一种基于多倍频旋转坐标正交变换的三相四线制电路谐波检测方法,详细阐述了多倍频旋转坐标正交变换的基本理论及其谐波检测的实现过程,并给出了仿真结果。该方法通过多倍频旋转坐标正交变换,将三相瞬时电压、瞬时电流变换为三维多倍频旋转空间瞬时电压、瞬时电流;然后利用交直流分解法对三维多倍频旋转空间瞬时电压、瞬时电流做进一步分析处理,得到特定频率的空间瞬时电压和瞬时电流;最后将分析处理结果变换为三相瞬时电压、瞬时电流。理论分析和仿真证明该方法能够无原理误差实时检测任意次谐波分量和任意基波分量的瞬时值,且具有检测精度高、实时性好、实现简单的特点。

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