Research on specific subharmonic current compensation based on backstepping control
The widespread use of nonlinear loads in power grids has led to increasingly severe harmonic pollu-tion problems.Active power filters are one effective means to address harmonic pollution.Based on harmonic extraction algorithms,considering both steady-state response and parameter selection,this study proposes the integration of backstepping control into harmonic compensation design,aiming to reconstruct the harmonic current tracking controller.By utilizing the theoretical framework of backstepping,the controller design achieves favorable steady-state compensation effects with relatively straightforward parameter selection.Simu-lation comparisons between PI control and backstepping control in MATLAB/Simulink validate the effective-ness of the proposed control strategy in compensating specific-order harmonics.Backstepping control of DC-side capacitor voltage exhibits smaller overshoot and faster response compared to PI control.The simulation re-sults collectively demonstrate that backstepping control offers higher compensation precision and faster dynam-ic response.
active power filterreverse step controlspecific subharmonicsDC side voltage regulation
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