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FPGA-based Development of Finite State-MPC for Three-Phase Grid-Connected VSI System
Vijay Kumar Singh,Ravi Nath Tripathi,Tsuyoshi Hanamoto 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
Power converters are used for grid integration of renewable sources that can achieve certain objectives through system control. Finite state - model predictive control (FS-MPC) is one of the techniques used for the grid integration of voltage source inverter (VSI) and possessing distinctive features such as fast dynamic performance and ability to incorporate constraints inherently. However, system development is one of the concern for FS-MPC due to computational delay problem. Field programmable gate array (FPGA) based system development is a way to tackle the mentioned problem because of its parallel processing nature. In this paper, FS-MPC is presented for three-phase grid-connected VSI system using modeling-based digital system design approach that is advantageous for analysis, easy debugging and FPGA-based system development. The integrated platform of MATLAB-Simulink and system generator is used for modeling and Hardware-in-the-loop (HIL) simulation to validate the system.
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플라잉 커패시터 멀티레벨 컨버터의 계산 부담 저감을 위한 일반화된 계층구조 단목적 모델 예측 제어기법
박동환,안정훈,김래영 전력전자학회 2024 전력전자학회 논문지 Vol.29 No.1
This paper proposes a generalized control method to reduce computational burden based on finite control set-model predictive control(FCS-MPC) in a single-phase flying capacitor multilevel converter(FCMC). The proposed method consists of FCS-MPC with a hierarchical structure, which controls the grid current and flying capacitor voltage step-by-step using their respective cost functions. The proposed method reduces the number of calculations by segmenting power devices into groups and sequentially finding the optimal state using a round-robin priority. In addition, the optimal state is found simply through calculation without comparison due to the single-objective cost function. Therefore, the amount of calculation is significantly reduced compared with the conventional method and leads to a shortened execution time. By reducing execution time, the sampling period can be shortened, thereby increasing the switching frequency. Furthermore, by using a smaller inductor, the total harmonic distortion(THD) of the grid current can be reduced. The effectiveness of the proposed method is verified through simulation and experiment using a single-phase 6-level FCMC at the laboratory scale.
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