|Table of Contents|

[1] WU Zhi, CHEN Shuaixian, XU Mingwang, CAO Yang, et al. Electromagnetic transient equivalent model of dual active bridge based on the generalized branch-cutting method [J]. Journal of Southeast University (English Edition), 2025, 41 (2): 156-163. [doi:10.3969/j.issn.1003-7985.2025.02.004]
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Electromagnetic transient equivalent model of dual active bridge based on the generalized branch-cutting method()
基于广义支路切割法的双有源桥电磁暂态等效模型

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
41
Issue:
2025 2
Page:
156-163
Research Field:
Electrical Engineering
Publishing date:
2025-06-17

Info

Title:
Electromagnetic transient equivalent model of dual active bridge based on the generalized branch-cutting method
基于广义支路切割法的双有源桥电磁暂态等效模型
Author(s):
WU Zhi1, CHEN Shuaixian1, XU Mingwang1, CAO Yang1, GU Wei1, LIU Wei2, YUAN Xiaodong3, HAN Huachun3
1.School of Electrical Engineering, Southeast University, Nanjing 210096, China
2.School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China
3.Electric Power Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
吴志1, 陈帅先1, 许明旺1, 曹阳1, 顾伟1, 柳伟2, 袁晓冬3, 韩华春3
1.东南大学电气工程学院， 南京 210096
2.南京理工大学自动化学院， 南京 210094
3.国网江苏省电力有限公司电力科学研究院， 南京 211103
Keywords:
electromagnetic transient simulation;  dual active bridge;  node-tearing;  branch-cutting method;  network simplification
电磁暂态仿真; 双有源桥; 节点撕裂法; 支路切割法; 网络化简
PACS:
TM743
DOI:
10.3969/j.issn.1003-7985.2025.02.004
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 proposed 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 methods without the introduction of a one-time-step delay. Subsequently, the internal nodes of each sub-network are eliminated through network simplification, and the equivalent circuit 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.
双有源桥电力电子变压器的传统详细模型具有节点导纳矩阵维数高、仿真步长小的特点，限制了电磁暂态仿真速度。针对这一问题，提出了一种基于广义支路切割法的新型电磁暂态等效模型，旨在提高双有源桥模型的仿真效率。首先，在不引入一步延迟的情况下，通过支路切割法和节点撕裂法将双有源桥拓扑初步分解成为2个子网络；然后，通过网络化简消除每个子网络的内部节点，并推导出端口级联模块的等效电路；最后，在多个工况下对模型进行仿真验证。结果表明，该模型避免了因一步延迟引入而导致的建模精度损失；不同工作条件下的相对误差保持在1%以下；且随着模块数目的增加，仿真加速比明显提高。

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Memo

Memo:
Received 2024-07-11,Revised 2024-09-11.
Biography:Wu Zhi (1987—), male, doctor, associate professor, zwu@ seu.edu.cn.
Foundation item:The Technology Project of State Grid Corporation of China Headquarters (No. 5400-202318547A-3-2-ZN).
Citation:WU Zhi,CHEN Shuaixian,XU Mingwang,et al.Electromagnetic transient equivalent model of dual active bridge based on the generalized branch-cutting method[J].Journal of Southeast University (English Edition),2025,41(2):156-163.DOI:10.3969/j.issn.1003-7985.2025.02.004.DOI:10.3969/j.issn.1003-7985.2025.02.004
Last Update: 2025-06-20