基于改进滤波及正负序分离法的锁相环

电网技术(2016)

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Abstract
针对谐波问题,提出了改进滤波法,采用对两相静止坐标系下的正交分量延时2个采样周期的方法提取基波分量;为快速地分离正负序分量,提出了改进型延迟周期(delay signal cancellation,DSC)法,通过延时1个采样周期的方法计算并分离正负序分量。对所提方法进行了详细的理论推导,并给出了一般性的表达式。结合开环控制结构在Matlab中搭建了对应的锁相环模型,最终通过实验平台进行了验证,结果表明了所提方法的可行性。
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Key words
improved filter method,open-loop control,positive and negative sequence detection,PLL
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