| Abstract |
This paper describes the sliding discrete Fourier
transform (DFT) algorithm as an alternative for typical DFT
used for spectrum analysis and synthesis. As an example a
control circuit for a three-phase 75 kVA parallel active power
filter (APF) is used. Such filters have been built and tested. Some
illustrative, experimental results are also presented in the paper.
The control algorithms of the proposed APF are implemented in
the fixed-point digital signal processor TMS320C50. The
presented control APF algorithm is a good alternative to classical
APF control algorithms, because it allows easy selection of
control parameters in mains currents: imbalance, reactive power
or harmonics contents. In the proposed circuit transient
performance of APF is improved using non-causal predictive
current compensation. |
