电力系统保护与控制2024，Vol.52Issue(19)：35-46,12.DOI:10.19783/j.cnki.pspc.240228
基于李雅普诺夫直接法的MMC控制策略研究
MMC control strategy based on a direct Lyapunov method
摘要
Abstract
To improve the control effect of a modular multilevel converter(MMC)under traditional PI control,an MMC control strategy based on the Lyapunov direct method is proposed.First,the mathematical model of the MMC rectifier is established.Secondly,the Lyapunov energy function of the MMC system is constructed.Then,the control system is designed on the basis of the MMC mathematical model and energy function.The influencing factors of DC voltage stability are analyzed by the Nyquist stability criterion,and the control performance of Lyapunov strategy and PI control strategy are compared and analyzed by a Bode diagram in the classical frequency domain.Finally,the two control strategies are simulated and studied when the load is switched,the voltage amplitude of AC side changes suddenly and the three-phase voltage of AC side is unbalanced.The results show that the Lyapunov control offers better control than the PI,and it is more suitable for nonlinear and coupled strongly systems such as with an MMC.关键词
模块化多电平变换器/李雅普诺夫直接法/PI控制/控制性能Key words
modular multilevel converter/direct Lyapunov method/PI control/control performance引用本文复制引用
郑征,魏梦雨,李绍令,史梦瑶..基于李雅普诺夫直接法的MMC控制策略研究[J].电力系统保护与控制,2024,52(19):35-46,12.基金项目
This work is supported by the Scientific and Technological Project of Henan Province(No.222102220014 and No.222102240027). 河南省科技攻关项目资助(222102220014 （No.222102220014 and No.222102240027）
222102240027) （）
河南省国际科技合作项目资助(232102520017) （232102520017）
