Impedance characteristics and stability analysis of DAB cascade single-phase inverter system

被引：0

作者：

Liu X. ^{[1
]}

Yuan J. ^{[1
]}

Gao X. ^{[1
]}

机构：

[1] School of Electrical and Electronic Engineering, North China Electric Power University, Baoding

来源：

Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2023年 / 27卷 / 12期

关键词：

cascaded system; dual active bridges; impedance model; impedance reshaping; single-phase grid-connected inverters; stability;

D O I：

10.15938/j.emc.2023.12.001

中图分类号：

学科分类号：

摘要：

Aiming at the problem of oscillation instability of the dual active bridge (DAB) DC-DC converter cascaded single-phase grid-connected inverter systems due to its impedance mismatching, the output and input impedance models of DAB and single-phase inverter were established, and the interaction stability of the cascade system was analyzed based on impedance analysis method. Firstly, the output impedance model of the front-stage DAB using the double-loop control strategy and the DC-side input impedance model of the back-stage inverter considering the influence of the phase-locked loop were derived, and the accuracy of the models were verified by frequency sweep method. Based on this, the impedance interaction model between the two was established. Additionally, the effects of PI parameters of DAB feedback controller on its output impedance frequency characteristics and cascade system stability were analyzed in detail, and the optimal design method of DAB control parameters was proposed accordingly, which improves the stability of the cascade system while taking into account the dynamic performance. Finally, the simulation examples verify accuracy of the impedance model, correctness of the analytical conclusions and effectiveness of the stability improvement method. © 2023 Editorial Department of Electric Machines and Control. All rights reserved.

引用

页码：1 / 11

页数：10

共 35 条

[1]

LI Jianlin, MA Huimeng, HUI Dong, Present development condition and trends of energy storage technology in the integration of distributed renewable energy, Transactions of China Electrotechnical Society, 31, 14, (2016)

[2]

ZHAO Biao, SONG Qiang, LIU Weihua, Et al., Overview of dual-active-bridge isolated bidirectional DC/ DC converter for high frequency link power conversion system, IEEE Transactions on Power Electronics, 29, 8, (2014)

[3]

SONG Shengli, LI Zhuoqiang, YAO Zhi, Et al., Modeling and closed loop control of three phase double active bridge DC transformer, Transactions of China Electrotechnical Society, 34, S2, (2019)

[4]

(2017)

[5]

LI Xiaoguang, WU Fengjiang, YANG Gujie, Et al., Improved modulation strategy for single-phase isolated quasi-single-stage AC / DC converter to improve current characteristics [ J ], IEEE Transactions on Power Electronics, 35, 4, (2020)

[6]

EVERTS J, KRISMER F, JEROEN V, Et al., Optimal ZVS modulation of single-phase single-stage bidirectional DAB AC/ DC converters, IEEE Transactions on Power Electronics, 29, 8, (2014)

[7]

IYER V M, GULUR S, BHATTACHARYA S., Small-signal stability assessment and active stabilization of a bidirectional battery charger, IEEE Transactions on Industry Applications, 55, 1, (2019)

[8]

(2020)

[9]

LIU Fangcheng, LIU Jinjun, ZHANG Haodong, Et al., Stability issues of Z + Z type cascade system in hybrid energy storage system (HESS), IEEE Transactions on Power Electronics, 29, 11, (2014)

[10]

ZHANG Xue, PEI Wei, DENG Wei, Et al., Stability analysis of AC/ DC hybrid distribution system with constant power load, Proceedings of the CSEE, 37, 19, (2017)

← 1 2 3 4 →