交流连续调谐滤波器失谐度的无盲区检测方法

A No-blind Area Detection Method of Detuning in Continuously Tuned AC Filter

失谐度的在线测量是交流连续调谐电力滤波器中的关键环节之一，其检测精度会影响到滤波器的性能及其运行的稳定性。针对目前调谐滤波器失谐度间接测量方法所存在的检测盲区问题，提出了一种基于滤波电容器和电抗器两端谐波电压幅值的失谐度测量方法，该方法克服了失谐度检测盲区的问题，且实现简单方便；建立了交流连续调谐滤波器的失谐度检测实验系统，实验结果表明该失谐度检测方法是有效准确的。

The measurement of detuning is a very crucial step in continuously tuned AC filter,and the detection precision can affect the filtering performance and operation stability. To solve the problem of detection dead zone in existing indirectly measurement of AC filter detuning,a new detection method based on the harmonic voltage crossed between the filter reactor and capacitor is proposed. The presented method not only overcomes the detection blind area,but also has advantages of simple implementation. A detuning detection experimental system is developed,and the results show the effectiveness and accuracy of the proposed method of filter detuning.