中国电机工程学报2025，Vol.45Issue(12)：4811-4821,中插24,12.DOI:10.13334/j.0258-8013.pcsee.232746
适用于高频电力电子电路的分数步长电磁暂态仿真方法
The Fractional Time-step Electromagnetic Transient Simulation Method Suitable for High-frequency Power Electronic Circuits
摘要
Abstract
In recent years,high-frequency power electronic circuits,represented by power electronic transformer,has attracted wide attention,and the dual active bridge part usually owns the switching frequency as high as tens of kHz.For electromagnetic transient simulation of high-frequency power electronic circuits,while adopting the constant admittance switch model is helpful to simplify the computation,there are still challenges to the simulation precision and efficiency.One is that the switch virtual loss brought by constant admittance switch model under high frequency switching actions seriously influences the simulation precision,while the other is that the required quite small simulation time-step will increase computing burden and affect the simulation efficiency.To cope with this,the paper proposes a fractional time-step simulation method(FTSSM),which adopts the improved highly-paralleled electromagnetic transient program(EMTP)algorithm for discretization modeling,and the simulation calculation is implemented as the iteration of a series of small step synthesis calculation process with different fractional time-steps.Here,the small step synthesis(SSS)with the idea of"modeling with small time-step while calculating with big time-step"can reduce the virtual loss,and the fractional time-steps are designed to exactly locate the switching actions so as to support the accurate simulation with larger time-step.Simulation results analysis shows that the proposed method can effectively improve the simulation precision of high-frequency power electronic circuits and support the larger time-step simulation with enough accuracy,which is helpful to accelerate the offline simulation and improve the real-time simulation performance.关键词
高频电力电子电路/电磁暂态仿真/恒导纳开关模型/小步合成/分数步仿真方法Key words
high-frequency power electronic circuits/electromagnetic transient simulation/constant admittance switch model/small-step synthesis/fractional time-step simulation method分类
信息技术与安全科学引用本文复制引用
吴盼,徐晋,汪可友,李子润,李国杰,周建其,王宏韬..适用于高频电力电子电路的分数步长电磁暂态仿真方法[J].中国电机工程学报,2025,45(12):4811-4821,中插24,12.基金项目
国家重点研发计划项目(2022YFE0105200) （2022YFE0105200）
国网浙江省电力有限公司科技项目(5211JX230004). National Key R&D Program of China(2022YFE0105200) （5211JX230004）
Science and Technology Project of State Grid Zhejiang Electric Power Company(5211JX230004). （5211JX230004）
