Analysis and Control of Safe and Stable Operation Region for Multi-port Power Electronic Transformer

被引：0
|
作者：
Li J. [1 ]
Wu J. [1 ]
Xiong F. [2 ]
Hao L. [1 ]
机构：
[1] School of Electrical Engineering, Beijing Jiaotong University, Beijing
[2] Collage of Automation, Chongqing University of Posts & Telecommunications, Chongqing
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2022年 / 46卷 / 20期
关键词：
AC/DC hybrid distribution network; distriuted generation; power electronic transformer; safe and stable operation region;
D O I：
10.7500/AEPS20211130003
中图分类号：
学科分类号：
摘要：
Multi-port power electronic transformer (PET) is the key equipment for AC/DC hybrid distribution network. However, when the difference in multi-port load power is large, it will cause a serious imbalance of PET interphase or in-phase power, which will exceed the power transmission capacity of PET and lead to system instability. Therefore, a safe and stable operation region analysis method and a stability control strategy of cascaded inter-phase parallel connected multi-port PET (CIPCM PET) are proposed. Firstly, the stable operation constraints of the system based on modulation ratio are established. Then, the analytical expressions of the safe and stable operation region of the system and its boundary are derived, and the definition and calculation method of the safe and stable operation margin are given. Finally, a power transfer strategy is proposed to improve the safe and stable operation margin of the PET. The effectiveness of the proposed strategy is verified in MATLAB/Simulink simulation. © 2022 Automation of Electric Power Systems Press. All rights reserved.
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页码：129 / 138
页数：9
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