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SHI Wen,CHI Song,GUO Liang.Fast Numerical Algorithm of Real-time Simulation for High-frequency Power Electronic Device Based on FPGA[J].JOURNAL OF POWER SUPPLY,2021,19(2):66-73
Fast Numerical Algorithm of Real-time Simulation for High-frequency Power Electronic Device Based on FPGA
Received:January 20, 2019  Revised:February 01, 2021
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DOI:10.13234/j.issn.2095-2805.2021.2.66
Keywords:field programmable gate array (FPGA)  high-frequency power electronic device  real-time simulation  iter-ative algorithm
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SHI Wen State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Electrical Engineering, Hebei University of Technology, Tianjin , China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, School of Electrical Engineering, Hebei University of Technology, Tianjin , China
CHI Song State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Electrical Engineering, Hebei University of Technology, Tianjin , China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, School of Electrical Engineering, Hebei University of Technology, Tianjin , China chis@hebut.edu.cn
GUO Liang State Key Laboratory of Reliability and Intelligence of Electrical Equipment, School of Electrical Engineering, Hebei University of Technology, Tianjin , China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, School of Electrical Engineering, Hebei University of Technology, Tianjin , China
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Abstract:
      Real-time simulation is conducive to achieving industrial distributed control, and it can optimize production processes and achieve flexible production. Owing to its high-speed parallel data processing characteristics, field programmable gate array (FPGA) is widely applied to real-time simulations. For the high-frequency power electronic devic-es, the phenomenon of divergence will appear in the simulation result when the variable-step algorithm is used to solve the problem of shift of switch. In addition, this algorithm prolongs the calculation time of simulations, increases the simulation step, and reduces the simulation accuracy. To achieve the real-time simulation with high precision and low cost, a fast numerical algorithm of real-time simulation which is suitable for FPGA is proposed, and the convergence of the trapezoidal algorithm is enhanced by improving the iterative algorithm in the traditional trapezoidal method. On this basis, the computa-tional structure of the algorithm is improved to make the calculation faster and more stable. A simulation model of a three-phase inverter circuit with 110 kHz switching frequency is built on the FPGA development board. 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 actions is proved.
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