IES_comparison_active_filters.pdf

It is also possible to notice that the performance of

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It is also possible to notice that the performance of the linear and of the deadbeat controllers turn out to be quite similar. The deadbeat controller exhibits a slight superiority in the case of The linear control’s performance, instead, turns out to be slightly more satisfactory in the case of where the bandwidth limitation is not very evident due to the low of the current reference. In all cases, it is possible to see that the fundamental component in the current error, which accounts for the difference in the rms and THD figures, is rather small. VII. C ONCLUSIONS This paper has discussed the difference in the dynamic performance of the three most popular current control tech-
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728 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 45, NO. 5, OCTOBER 1998 (a) (b) Fig. 10. (a) Simulated active filter behavior with and hysteresis control; (150 A/div), (75 A/div), (2 ms/div) (b) Line current spectrum. niques for active filter applications. All the techniques, hys- teresis control, deadbeat control, and linear rotating frame control were considered, including the latest improvements brought by their industrial application. The comparison is performed by simulating a typical, high-demanding active filter application where the distorting load to be compen- sated is a thyristor rectifier. Two different values of the firing angle were considered to underline the dependence of the achievable performance on the slope of the current reference. The improvements in the control techniques result in rather satisfactory performance levels for all three controllers. How- ever, the results of the comparison show a certain superiority of the hysteresis control. Indeed, the performance of this control strategy is almost unaffected by the variation in the firing angle and, on the basis of the performance indices considered in the paper, i.e., harmonic content, THD, and rms of the current error, turns out to be better than the other techniques. The deadbeat controller, which has the advantage of being suitable for a fully digital implementation, is limited in its performance by the inherent calculation delay. Instead, the linear control’s bandwidth limitation turns into a not completely satisfactory quality of compensation, (a) (b) Fig. 11. (a) Simulated active filter behavior with and hysteresis control; (150 A/div), (75 A/div), (2 ms/div) (b) Line current spectrum. TABLE II RMS C URRENT E RROR AND L INE C URRENT THD FOR TABLE III RMS C URRENT E RROR AND L INE C URRENT THD FOR especially in correspondence of high in the current reference.
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BUSO et al. : CURRENT CONTROL TECHNIQUES FOR ACTIVE FILTER APPLICATIONS 729 R EFERENCES [1] V. R. Stefanovic and R. M. Nelms, “Microprocessor control of motor drives and power converters,” in Tutorial Course Rec., IEEE-IAS Annu. Meeting , Dearborn, MI, Oct. 1991, pp. 5/1-35.
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  • Fall '19
  • Current Source, IEEE Trans, Luigi Malesani

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