电工技术学报  2020, Vol. 35 Issue (12): 2596-2611    DOI: 10.19595/j.cnki.1000-6753.tces.190850
电力电子 |
基于端口受控耗散哈密顿系统模型的模块化多电平变换器无源反步环流抑制方法
薛花, 潘哲晓, 王育飞, 田广平, 杨兴武
上海电力大学电气工程学院 上海 200090
MMC Passivity-Based and Backstepping Circulating Current Suppressing Method Based on Port-Controlled Hamiltonian with Dissipation Model
Xue Hua, Pan Zhexiao, Wang Yufei, Tian Guangping, Yang Xingwu
Electric Power Engineering Shanghai University of Electric Power Shanghai 200090 China
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摘要 模块化多电平变换器(MMC)应用于大功率可再生能源发电并网时,由于存在可再生能源的随机性波动、系统参数摄动和本身的非线性特性,采用传统矢量控制方法实现MMC环流抑制难以确保系统全局稳定运行和强鲁棒性能。针对这一问题,提出基于端口受控耗散哈密顿系统(PCHD)模型的MMC无源反步环流抑制方法。在构建基于PCHD模型的MMC全局能量函数基础上,设计无源性控制器,通过能量函数整形,修正闭环系统的能量耗散和能量流动方式,使系统能量在期望平衡点取最小值,以实现系统全局渐进稳定。结合反步控制方法,消除不确定扰动与MMC系统参数摄动引起的跟踪误差,从而实现系统内、外扰动情形下环流二倍频分量的快速平抑。基于Matlab/Simulink的仿真结果与基于dSPACE的实验结果表明:所提无源反步环流抑制方法具有形式简单、无奇异点、暂态性能好的特点,同时能够确保系统全局稳定与强鲁棒性。
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薛花
潘哲晓
王育飞
田广平
杨兴武
关键词 模块化多电平变换器环流抑制端口受控耗散哈密顿系统模型无源性控制反步法    
Abstract:Modular multilevel converter (MMC) is widely used in renewable energy power grid connection. However, due to the random fluctuations, system parameter perturbation and its nonlinear characteristics, it is difficult to ensure the global asymptotic stability and strong robustness of MMC circulation suppression using traditional vector control methods. To solve this problem, a novel passivity-based and backstepping circulating current suppressing method based on port-controlled Hamiltonian with dissipation (PCHD) model was proposed. Based on the MMC global energy function of the PCHD model, the passivity-based controller was designed to correct the energy dissipation and flow of the closed-loop system through energy function shaping, so that the system energy could obtain the minimum value at the desired equilibrium point. The global asymptotic stability of the system was realized. The backstepping control method was adopted to eliminate the tracking error caused by uncertain disturbance and MMC parameter perturbation, thereby realizing the fast tracking of circulating double frequency components. The results of Matlab/Simulink and dSPACE show that the proposed passivity-based and backstepping circulating current suppressing method of MMC has the advantages of simplicity, no singularity and good transient performance, which can ensure the global stability and robustness of the system.
Key wordsModular multilevel converter    circulating current suppressing    port-controlled Hamiltonian with dissipation (PCHD) model    passivity-based control    backstepping   
收稿日期: 2019-07-17     
PACS: TM46  
基金资助:国家自然科学基金(51407114)、上海市科技创新行动计划(19DZ2204700)和上海工程技术研究中心(13DZ2251900)资助项目
通讯作者: 薛 花 女,1979年生,博士,副教授,研究方向为大功率新能源并网逆变器技术、非线性理论与控制方法。E-mail: distributepower@163.com   
作者简介: 潘哲晓 男,1994年生,硕士研究生,研究方向为模块化多电平技术、非线性控制。E-mail: pzxdyx@foxmail.com
引用本文:   
薛花, 潘哲晓, 王育飞, 田广平, 杨兴武. 基于端口受控耗散哈密顿系统模型的模块化多电平变换器无源反步环流抑制方法[J]. 电工技术学报, 2020, 35(12): 2596-2611. Xue Hua, Pan Zhexiao, Wang Yufei, Tian Guangping, Yang Xingwu. MMC Passivity-Based and Backstepping Circulating Current Suppressing Method Based on Port-Controlled Hamiltonian with Dissipation Model. Transactions of China Electrotechnical Society, 2020, 35(12): 2596-2611.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.190850          https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I12/2596