Passivity-based Control and Large Signal Stability of DC-DC Converter Parallel System

被引：0
|
作者：
Wang M. [1 ]
Tang F. [1 ]
Chen Q. [2 ]
Wu X. [1 ]
Niu J. [1 ]
机构：
[1] National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Haidian District, Beijing
[2] China Electric Power Research Institute, Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2022年 / 42卷 / 18期
基金：
中国国家自然科学基金;
关键词：
constant power load (CPL); converter parallel system; large signal disturbance; passivity-based control (PBC); virtual DC machine compensation control;
D O I：
10.13334/j.0258-8013.pcsee.211486
中图分类号：
学科分类号：
摘要：
Due to the negative impedance characteristic of constant power load, it is difficult for the DC-DC converter to work stably at the desired operating point, which affects the stability of the converter parallel system. To address this issue, based on Euler-Lagrange model, an improved passivity-based controller was designed to realize the stable operation of the converter parallel system under large signal disturbance by means of the damping and interconnection injecting. However, the controller had steady-state error under large signal disturbance. To solve this problem, the virtual DC machine compensation control was adopted to provide extra inertia and damping for converters, which enhanced the robustness of the parallel system under large signal disturbance and the adaptability of improved passivity-based controller. Finally, the simulation and experimental results show that the proposed control strategy can realize the stable operation of the converter parallel system under large signal disturbance while effectively suppress the output voltage fluctuation and steady-state error. Compared with interconnection and damping assignment passivity-based control (IDA-PBC) used in the parallel system, the proposed control strategy has smaller voltage overshoot, faster voltage regulation speed and better dynamic characteristics. ©2022 Chin.Soc.for Elec.Eng. 6789.
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页码：6789 / 6802
页数：13
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