![]() Ahmed Mustafa Hussein Chapter 2 Pulse Transfer Function After completing this chapter, the students will be able to: Obtain the open-loop transfer function for digital control systems, Obtain the closed-loop transfer function for digital control systems, 1. The highest harmonic frequency that can be stably compensated with each control method has been determined, indicating significant differences in the control performance. 1 Chapter Two: Pulse Transfer Function Dr. Theoretical findings and analysis are supported by comparative experimental results on a 7-kVA laboratory setup. It emerges that the fourth one has superior behavior and robustness and can stably work at higher frequencies than the others. It is concluded that three of them have identical harmonic behavior despite the fact that their implementation is significantly different. ![]() Analytical similarities and differences between schemes in terms of frequency response characteristics are emphasized. The analysis is focused on the comparison of harmonic and total closed-loop transfer functions for each controller. The complete current controller is the superposition of all individual harmonic controllers and may be implemented in various reference frames. All controllers under scrutiny perform the harmonic compensation by using arrays of resonant controllers, one for the fundamental and one for each harmonic of interest, in order to achieve zero phase shift and unity gain in the closed-loop transfer function for selected harmonics. Abstract: This paper compares four current control structures for selective harmonic compensation in active power filters.
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