AU - Fallah, Mehdi AU - Kazemzadeh, Rasool AU - Najafi Aghdam, Esmaeil TI - Improvement of steady and transient response of instantaneous power theory compensation method using recursive least squares and wavelet transform under non-ideal voltage condition PT - JOURNAL ARTICLE TA - jnsee JN - jnsee VO - 3 VI - 1 IP - 1 4099 - http://journals.sut.ac.ir/jnsee/article-1-96-en.html 4100 - http://journals.sut.ac.ir/jnsee/article-1-96-en.pdf SO - jnsee 1 ABĀ  - Steady-state and transient response of the active power filter based on instantaneous power theory compensation method is dependent on the accurately and quickly extract the DC component of load active power. In this paper, for improving the response of this method, the numerical filter based on recursive least squares with variable forgetting factor in order to separation of DC component of load active power is proposed. Unlike conventional low-pass filters, the feature of designed numerical filter is independent of load harmonic components, quick and precision of the answer. Also, using wavelet transform the performance of active power filter under the non-ideal voltage condition is improved. Finally, the second order delta-sigma modulation is used to generate the switching pulses. Simulation results on MATLAB / SIMULINK software shows that the proposed method is properly. CP - IRAN IN - Sahand University of Technology LG - eng PB - jnsee PG - 5 PT - Research YR - 2015