Electromagnetic Transient Equivalent Modeling of Power Electronic Transformer Based on Equations Using Two-port Network Parameters

被引：0
|
作者：
Gao C. [1 ]
Sun Y. [1 ]
Wang H. [1 ]
Zheng C. [1 ]
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
来源：
Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 08期
关键词：
electromagnetic transient (EMT); parameter conversion; power electronic transformer (PET); two-port network;
D O I：
10.13335/j.1000-3673.pst.2022.1172
中图分类号：
学科分类号：
摘要：
Power electronic transformer (PET) plays an important role in achieving the large-scale AC-DC hybrid power grid and new energy connection. However, the electromagnetic transient (EMT) simulation of the PET is extremely time-consuming due to the large number of electrical nodes and small simulation time-steps. Taking the two-port PET as the research object, an equivalent modeling method for PET based on the equations using the two-port network parameters is proposed in this paper. Taking the dual active bridge (DAB) type PET as an example, the equivalent circuit and parameters are obtained through the multiplication of the transmission parameters of the DAB internal subunits, the accumulation of the hybrid parameters of each DAB, and the mutual conversion between various parameters. The proposed model is verified in the PSCAD/EMTDC simulation platform. The results show that when the number of DAB is greater than 50, the equivalent model is able to achieve a speedup of more than 2 orders of magnitude compared with the detailed model, with the maximum relative error less than 3%. © 2023 Power System Technology Press. All rights reserved.
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页码：3396 / 3405
页数：9
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