A Computationally Efficient RDFT-Based Reference Signal Generator for Active Compensators

Several methods for the generation of the control reference signals for active compensators have been proposed. Many of those reference signal generation techniques use filters to extract the desired components of the current. Frequency-domain methods are generally not used due to high computational complexity as well as susceptibility to frequency variation and numerical errors. In this paper, a computationally efficient and robust recursive discrete Fourier transform-based reference signal generator is proposed for use in active compensator applications. In addition to mathematical analysis, discussions, and simulations, an experimental prototype of an active compensator with the proposed reference signal generator has been built, and experimental results have been obtained.