电力调谐滤波器的最佳偏调谐设计

Tuned Power Filter With Optimal Tuned Frequency

在给定谐波分流比的条件下,导出了滤波器参数选择范围与最大失谐度的关系式。提出了一种最佳偏调谐设计方法,通过调整滤波器的调谐频率,使滤波器的正负失谐度产生一定偏移,当调整后的最大正失谐与最大负失谐对滤波器容量下限的要求一致时,滤波器的容量下限将最小。模拟计算结果表明,与全调谐和经验调谐设计相比,最佳偏调谐设计的滤波器具有最小的容量下限。

Restriction on tuned power filter parameters due to the maximum detuning was derived, and the filter with an optimal tuned frequency was proposed to minimize the requirement of filter capacity. Providing that the harmonic current division is specified, the lower limit of filter capacity is directly proportional to the maximum detuning. Considering the worst condition, the larger one in the two lower limits of filter capacity corresponding to the maximum positive detuning and negative detuning must be adopted. To minimize the filter capacity, the detuning is such biased by selecting an optimal tuned frequency that the filters just satisfy the performance criteria at both the maximum positive and negative detuning. A design example shows that the filters with optimal tuning have the lowest capacity requirement, as compared to those filters with normal tuning or experience-based tuning.