Harmonic compensation using the sliding DFT algorithm

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 were used two control circuits for single-phase 3.5 kVA parallel active power filter (APF). The Filters have been built and tested. Some illustrative, experimental results have also been presented in the paper. The control algorithms of the proposed APF are implemented in the floating-point digital signal processor ADSP-21065L and FPGA circuit.