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      저자 : Maosong Zhang (검색결과 2 건)
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        Fast FCS-MPC-Based SVPWM Method to Reduce Switching States of Multilevel Cascaded H-Bridge STATCOMs

        Wang, Xiuqin,Zhao, Jiwen,Wang, Qunjing,Li, Guoli,Zhang, Maosong The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.1

        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.

      • KCI등재

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

        Xiuqin Wang,Jiwen Zhao,Qunjing Wang,Guoli Li,Maosong Zhang 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.1

        Finite control set model-predictive control (FCS-MPC) has received increasing attentions due to its outstanding dynamicperformance. It is being widely used in power converters and multilevel inverters. However, FCS-MPC requires a lot ofcalculations, especially for multilevel-cascaded H-bridge (CHB) static synchronous compensators (STATCOMs), since it has totake account of all the feasible voltage vectors of inverters. Hence, an improved five-segment space vector pulse widthmodulation (SVPWM) method based on the non-orthogonal static reference frames is proposed. The proposed SVPWM methodhas a lower number of switching states and requires fewer computations than the conventional method. As a result, it makesFCS-MPC more efficient for multilevel cascaded H-bridge STATCOMs. The partial cost function is adopted to sequentiallysolve for the reference current and capacitor voltage. The proposed FCS-MPC method can reduce the calculation burden of theFCS-MPC strategy, and reduce both the switching frequency and power losses. Simulation and experimental results validate theexcellent performance of the proposed method when compared with the conventional approach.

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