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根据数字信号处理理论 ,导出基于频谱搬移原理的同步相关滤波技术 ,用于基波频率变化、谐波频谱与基波接近且包含低于基频的次谐波成分信号的谐波检测之中。理论分析与实验运行表明 ,这是一种解决交 -交变频器交流励磁发电系统电力谐波检测的有效方法。
According to the theory of digital signal processing, the synchronization-dependent filtering technique based on the principle of spectral shift is derived for harmonic detection of fundamental frequency variation, harmonic spectrum close to the fundamental and sub-harmonic component signals below the fundamental frequency. Theoretical analysis and experimental run show that this is an effective method to solve the power harmonic detection of AC-AC power generation system.