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http://dx.doi.org/10.6113/JPE.2019.19.1.244

Fast FCS-MPC-Based SVPWM Method to Reduce Switching States of Multilevel Cascaded H-Bridge STATCOMs  

Wang, Xiuqin (School of Electrical Engineering and Automation, Anhui University)
Zhao, Jiwen (School of Electrical Engineering and Automation, Anhui University)
Wang, Qunjing (School of Electrical Engineering and Automation, Anhui University)
Li, Guoli (School of Electrical Engineering and Automation, Anhui University)
Zhang, Maosong (School of Electrical Engineering and Automation, Anhui University)
Publication Information
Journal of Power Electronics / v.19, no.1, 2019 , pp. 244-253 More about this Journal
Abstract
Finite control set model-predictive control (FCS-MPC) has received increasing attentions due to its outstanding dynamic performance. It is being widely used in power converters and multilevel inverters. However, FCS-MPC requires a lot of calculations, especially for multilevel-cascaded H-bridge (CHB) static synchronous compensators (STATCOMs), since it has to take account of all the feasible voltage vectors of inverters. Hence, an improved five-segment space vector pulse width modulation (SVPWM) method based on the non-orthogonal static reference frames is proposed. The proposed SVPWM method has a lower number of switching states and requires fewer computations than the conventional method. As a result, it makes FCS-MPC more efficient for multilevel cascaded H-bridge STATCOMs. The partial cost function is adopted to sequentially solve for the reference current and capacitor voltage. The proposed FCS-MPC method can reduce the calculation burden of the FCS-MPC strategy, and reduce both the switching frequency and power losses. Simulation and experimental results validate the excellent performance of the proposed method when compared with the conventional approach.
Keywords
Finite control set model-predictive control (FCS-MPC); Multilevel cascaded H-bridge (CHB); Space vector pulse width modulation (SVPWM); Static synchronous compensator;
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