Robust Predictive Control for NPC Grid-Connected Inverters

Abstract:

In this paper, the state space model of neutral point clamped three-level grid-connected inverter is detailed derived and an Robust Predictive Control (RPC) method is proposed. In the proposed method, the total 27 switching vectors composed of a finite set from which the optimal switching vector is selected according to a cost function. The robust performance is improved just by increasing switching frequency. Experimental results show that the proposed method has a flexible control purposes and we can optimize the synthesize performance just by adjusting weighting coefficients of cost function. In addition, RPC controller has a robust performance in tracking output reference current and balancing neutral point voltage.

• Periodical: Applied Mechanics and Materials (Volumes 668-669)
• Pages: 522-525
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.668-669.522
• Online since: October 2014
• Authors: Lu Jun Wang, Tao Gong, Jun Zhu
• Keywords: Grid-Connected Inverters, NPC, Predictive Control, Robust Control

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