面向海上分频输电的九边形MMC的无源滑模控制策略  

Passivity-based Sliding-mode Control Strategy of Nonagonal Converter for Fractional Offshore Wind Power Transmission

作　　者：程启明 杜婷伟 渠博岗 CHENG Qiming;DU Tingwei;QU Bogang(Shanghai Key Laboratory of Power Station Automation Technology(College of Automation Engineering,Shanghai University of Electric Power),Yangpu District,Shanghai 200090,China)

机构地区：[1]上海市电站自动化技术重点实验室(上海电力大学自动化工程学院),上海市杨浦区200090

出　　处：《中国电机工程学报》2025年第3期1088-1098,I0023,共12页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家自然科学基金项目(62303301);上海市电站自动化技术重点实验室项目(13Z2273800)。

摘　　要：九边形模块化多电平变换器(nonagonal modular multilevel converter,N-MMC)是一种多端口、直接的AC/AC变换器,具有低频性、高可靠性等优点,在海上风电的分频输电领域备受关注。目前,对九边形变换器的研究通常未将内部电气量解耦而直接进行控制,并且当前常用的单一的控制方法均存在一些问题,它们的控制效果有待提升。为了改善其动态响应性能和抗干扰能力,在建立九边形变换器的解耦模型的基础上,将无源控制(passivity-based control,PBC)与滑模控制结合(sliding mode control,SMC)的无源滑模控制(PBC-SMC)用于N-MMC的控制。最后,在Matlab上搭建九边形变换器的PBC-SMC复合控制系统仿真,并模拟稳态、动态、暂态的多种不同工况,对比PI、PBC、PBC-SMC的控制效果,验证PBC-SMC复合控制的响应速度更快、电能质量更高。此外,还在RT-LAB实验平台上验证所提PBC-SMC策略的有效性。Nonagonal modular multilevel converter is a multi-port and direct AC/AC converter with the advantages of low frequency and high reliability,which has attracted much attention in the field of fractional frequency transmission of offshore wind power.At present,the research on nonagonal converter usually does not decouple the internal electric quantity but directly controls it,and the single control methods commonly used have some problems,the control effect needs to be improved.To improve its dynamic response and anti-interference ability,this paper combines passivity-based control with sliding mode control on the basis of establishing decoupling model of nonagonal converter.Finally,the PBC-SMC control system simulation of nonagonal converter are built on Matlab,and the experimental results under different various steady,dynamic,and transient working conditions verify the feasibility of the PBC-SMC control.Compared with PI and PBC strategy,PBC-SMC strategy has faster response speed and higher power quality.In addition,the effectiveness of the proposed PBC-SMC strategy is verified on the RT-LAB experimental platform.

关 键 词：海上风电 分频输电 九边形模块化多电平变换器 无源滑模控制 无源控制 PI控制 

分 类 号：TM762[电气工程—电力系统及自动化]