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Fast Numerical Algorithm of Real-time Simulation for high-frequency power electronic based on FPGA
Received:January 20, 2019  Revised:February 20, 2019
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Keywords:field programmable gate array (FPGA)  high-frequency power electronic device  real-time simulation  simulation methods  the iterative algorithm
Fund Project:
Shi Wen School of Electrical Engineering, Hebei University of Technology yixing5656@qq.com
Chi Song School of Electrical Engineering, Hebei University of Technology chis@hebut.edu.cn
Guo Liang School of Electrical Engineering, Hebei University of Technology 1742364529@qq.com
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      Real-time simulation has been applied to not only achieving industrial distributed control, but also optimizing production processes and achieve flexible production. FPGA(Field Programmable Gate Array) is widely used in real-time simulation due to its high-speed parallel data processing capability. For the high-frequency of the power electronic switching device, the simulation result will appear divergence when the variable step algorithm is used to solve the shift of switch action. And the algorithm extends the simulation calculation time ,resulting in an increase in the simulation step, reduced simulation accuracy. A fast numerical algorithm, which is based on FPGA program structure, is proposed to achieve the high precision and low-cost real-time simulation. The convergence of the ladder algorithm is improved through the improvement of the iterative algorithm in the traditional trapezoidal method. On this basis, the computational structure of the algorithm is improved to make the calculation faster and more stable. A three-phase inverter circuit simulation model is built in the FPGA development board with 110 kHz switch-frequency. Compared with the traditional iterative algorithm, the effectiveness and real-time performance of the improved trapezoidal simulation algorithm and the computational structure under high frequency switching action is proved.