A signal Processing system for extraction of harmonics and reactive current of single-phase systems |
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Authors: | Karimi-Ghartemani M Mokhtari H Iravani MR Sedighy M |
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Affiliation: | Dept. of Electr. & Comput. Eng., Univ. of Toronto, Ont., Canada; |
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Abstract: | A signal processing system for extraction of harmonic and reactive current components is introduced and its performance is evaluated. The extraction system is adopted as part of the control system of a single-phase active power filter (APF) to provide the required signals for harmonic filtering and reactive power compensation. Performance of the overall system is evaluated based on digital time-domain simulation studies. The APF control system including the signal processing algorithms are implemented in Matlab/Simulink Fixed-Point Blockset to accommodate bit-length limitation which is a crucial factor in digital implementation. The power system including the APF, load and the supply system are simulated with the PSCAD/EMTDC software to which the Matlab-based control model is interfaced. The simulation results indicate that the signal processing unit can provide the required signals for APF to perform filtering/compensation within the transient period of 2 to 3 cycles. |
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