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一种改进的单相电路ip-iq谐波检测方法

Keywords: 单相电路,谐波检测,ip-iq算法,反馈,椭圆低通滤波器

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Abstract:

针对单相电路谐波的特点,以瞬时无功理论为基础,分析了单相电路ip-iq谐波检测法.综合考虑检测的精度及实时性要求,提出一种更适合单相电路谐波检测的改进方法.该检测方法在引入反馈环节、改善检测系统实时性的基础上,采用过渡带衰减速率快、频率特性好的椭圆低通滤波器代替传统的巴特沃斯低通滤波器,减少低通滤波器的延时及对检测精度的影响.利用MATLAB/Simulink进行建模和仿真,证明改进算法提高了检测精度和动态响应速度.

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