摘要
模块化多电平矩阵变换器(MMMC)应用于新能源海上风电直接AC/AC变换时,由于新能源发电的随机性及本身的非线性特性,在三相电压不平衡下MMMC输入、输出双侧电流常用的PID控制策略难以达到理想的控制效果,基于Lyapunov函数控制方法的控制器数量、控制复杂程度和控制效果都优于PID控制,提出了三相电压不平衡下MMMC的输入、输出双侧采用Lyapunov控制策略。根据MMMC的数学拓扑结构建立三相电压不平衡下MMMC双侧Lyapunov的数学模型,证明了其具有全局渐进稳定性,讨论了控制不精确以及参数选择问题。最后通过仿真平台对提出的Lyapunov控制策略与PID控制策略进行仿真比较,验证了所提控制方法的正确性与优越性。所提Lyapunov控制方法相较于PID控制稳定速度更快,总谐波畸变量(THD)更低,且具有强鲁棒性,对参数的变化不敏感。
To address the application of modular multilevel matrix converter(MMMC)for direct AC/AC conversion of new energy offshore wind power,due to the stochastic nature of new energy generation and its own nonlinear characteristics,by the common PID control strategy for MMMC input and output dualside currents under three-phase voltage unbalance it is difficult to achieve the ideal control effect.Based on the fact that the number of controllers,control complexity,and control effect of the Lyapunov control method is better than PID control,Lyapunov control strategy for the input and output sides of MMMC under three-phase voltage unbalance was proposed.According to the mathematical topology of MMMC,the mathematical model of MMMC dual-side Lyapunov under three-phase voltage unbalance was established,which is proved to have global asymptotic stability,and the control inaccuracy and parameter selection problems are discussed.Finally,correctness and superiority of the proposed control method were verified by simulating and comparing the proposed Lyapunov control strategy with the PID control strategy on the simulation platform.The proposed Lyapunov control method has faster stabilization and lower total harmonic distortion(THD)compared to PID control,and it has strong robustness and insensitivity to parameter changes.
作者
程启明
赖宇生
谢怡群
陈颖
沈章平
CHENG Qiming;LAI Yusheng;XIE Yiqun;CHEN Ying;SHEN Zhangping(College of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Lu’an Power Supply Company of Anhui Power Grid Co.,Ltd.,Lu’an 237000,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2023年第5期96-107,共12页
Electric Machines and Control
基金
国家自然科学基金(61905139)
上海市电站自动化技术重点实验室资助项目(13DZ2273800)。
