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Improvement of steady and transient response of instantaneous power theory compensation method using recursive least squares and wavelet transform under non-ideal voltage condition
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Mehdi Fallah   , Rasool Kazemzadeh * , Esmaeil Najafi Aghdam |
| Sahand University of Technology , r.kazemzadeh@sut.ac.ir |
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Abstract: (15603 Views) |
| 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. |
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| Keywords: steady and transient response, recursive least squares, active filter, compensation, delta-sigma modulation |
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Full-Text [PDF 596 kb]
(3289 Downloads)
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Type of Study: Research |
Subject:
Power Electronics Application in Power Systems
Received: 2014/04/13 | Accepted: 2015/01/23 | Published: 2015/10/10
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