Stability and Truncation Error Analysis of Electromagnetic Transient Equivalent Algorithm for Dual Active Bridge Converter

被引：0
|
作者：
Gao C. [1 ]
Ding J. [1 ]
Zhao H. [2 ]
Xu J. [1 ]
Zhao C. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing
[2] University of Manitoba, Winnipeg, R3T 5V6, MB
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2021年 / 41卷 / 01期
基金：
国家重点研发计划;
关键词：
High-frequency isolated dual active bridge (DAB); Integration decoupling (ID); Stability of numerical integration; Trapezoidal rule (TR); Truncation error;
D O I：
10.13334/j.0258-8013.pcsee.200239
中图分类号：
学科分类号：
摘要：
The high-frequency isolated dual active bridges converter (DAB) are core equipment of the power electronic transformers (PET). It has been well-known that the electromagnetic transient (EMT) simulation of PET time inefficient due to the existence of the high-frequency links and the large node counts inside each power module. In this paper, the stability and truncation error of the integration decoupling algorithm for DAB type converter were analyzed. First, a simplified circuit of DAB with its equation of state were given. Second, the Lyapunov direct method with a special symmetric matrix was used to analyze the stability of continuous and discrete systems under Forward Euler (FE), Trapezoidal Rule (TR) and integral decoupling (ID) methods. Third, the local truncation error of TR and ID methods was calculated and the relative root mean square error was established as a measure of global error. Fourth, the constraint effect of different integration methods on the simulation step size was analyzed considering the actual transformer parameter value. Finally, stability and error verification were performed in PSCAD/EMTDC. The results show that the stability and truncation error of the ID and TR method will not impose additional constraints on the simulation step size. © 2021 Chin. Soc. for Elec. Eng.
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页码：308 / 317
页数：9
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