Comparison of different methods of reference current generation for shunt active power filter under balanced and unbalanced load conditions

In this paper a comparison of three different control strategies for reference current generation in shunt active power filter is considered. The study involves two methods in time domain and one method in frequency domain. The three techniques studied are Instantaneous Reactive Power Theory (pq), Synchronous Reference Frame theory (SRF) and Discrete Fourier Transform Algorithm (DFT). The evaluation of these methods is done under three phase balanced and unbalanced non-linear load conditions. Also the dynamic performance of these methods is evaluated. The results are evaluated and compared using MATLAB/Simulink.