PROJECT TITLE :

DC-link capacitor voltage control for single-phaseshunt active power filter with step sizeerror cancellation in self-charging algorithm - 2016

ABSTRACT:

This study presents an improved self-charging algorithm by introducing a new feature called step size error cancellation for better performance of DC-link capacitor voltage control in single-part shunt active power filter (SAPF). Previous works of self-charging algorithms were focused only for steady-state operation by using either proportional-integral (PI) or fuzzy logic control (FLC). However, during a bound operation of any Power System, dynamic operation might conjointly happen. Thus, by introducing step size error cancellation as an additional feature to the self-charging algorithm, each steady state and dynamic operations can be lined. For evaluation and comparison analysis, self-charging with PI and FLC algorithms have been developed too. All the algorithms were simulated in MATLAB-Simulink, respectively, along with the single-phase SAPF. For hardware implementation, the proposed algorithm was programmed in TMS320F28335 Digital Signal Processing board. The other two conventional self-charging algorithms were also programmed for comparison functions. From the results and analysis, the proposed self-charging with step size error cancellation shows the best performance with high accuracy, quick response time and less overshoot and undershoot. It performs well in both steady state and dynamic operations as compared with both previous self-charging techniques which only work well in steady-state operation.


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