INPUT PERFORMANCE ENHANCED BASED PREDICTIVE CONCEPT AND SPACE VECTOR FOR MATRIX RECTIFIER
DOI:
https://doi.org/10.62985/j.huit_ojs.vol26.no2E.381Keywords:
Power factor, input performance, predictive concept, space vector, matrix rectifierAbstract
To address the simultaneous challenges of grid-side power quality in AC-DC matrix converters, this study proposes a predictive strategy founded on the space vector modulation (SVM) framework. The salient and defining contribution of this research is the rigorous enforcement of unity power factor (UPF) operation across the entire modulation range, particularly addressing the phase displacement issues often observed at low modulation depths. In conventional control schemes, maintaining precise phase synchronization between the current input and grid voltage presents a significant hurdle; however, this proposal overcomes that limitation through a physics-based approach. Specifically, the predictive control (PC) algorithm is utilized to mathematically derive the input current dynamics. By processing the instantaneous system states, the PC algorithm analytically computes an optimal input current reference vector that is perfectly phase-locked with the source voltage vector. This process effectively nullifies the displacement angle, thereby eliminating reactive power injection into the utility grid. This optimized reference trajectory is subsequently synthesized by the SVM stage, which provides high-resolution vector placement to enhance waveform fidelity. The resulting synergy guarantees a near-zero displacement power factor on the AC side while concurrently maintaining high-quality current on the DC side. The efficacy of this approach in maximizing active power transfer efficiency and ensuring high-quality waveform generation at both input and output ports is substantiated through extensive simulation analysis.
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