东南大学学报（英文版）2025，Vol.41Issue(2)：156-163,8.DOI:10.3969/j.issn.1003-7985.2025.02.004
基于广义支路切割法的双有源桥电磁暂态等效模型
Electromagnetic transient equivalent model of dual active bridge based on the generalized branch-cutting method
摘要
Abstract
The traditional detailed model of the dual active bridge(DAB)power electronic transformer is characterized by the high dimensionality of its nodal admittance matrix and the need for a small simulation step size,which limits the speed of electromagnetic transient(EMT)simulations.To overcome these limitations,a novel EMT equivalent model based on a generalized branch-cutting method is pro-posed to improve the simulation efficiency of the DAB model.The DAB topology is first decomposed into two sub-networks through branch-cutting and node-tearing meth-ods without the introduction of a one-time-step delay.Sub-sequently,the internal nodes of each sub-network are elimi-nated through network simplification,and the equivalent cir-cuit for the port cascade module is derived.The model is then validated through simulations across various operating conditions.The results demonstrate that the model avoids the loss of accuracy associated with one-time-step delay,the relative error across different conditions remains below 1%,and the simulation acceleration ratios improve as the number of modules increases.关键词
电磁暂态仿真/双有源桥/节点撕裂法/支路切割法/网络化简Key words
electromagnetic transient simulation/dual ac-tive bridge/node-tearing/branch-cutting method/network simplification分类
动力与电气工程引用本文复制引用
吴志,陈帅先,许明旺,曹阳,顾伟,柳伟,袁晓冬,韩华春..基于广义支路切割法的双有源桥电磁暂态等效模型[J].东南大学学报（英文版）,2025,41(2):156-163,8.基金项目
The Technology Project of State Grid Corporation of China Headquarters(No.5400-202318547A-3-2-ZN). （No.5400-202318547A-3-2-ZN）
