浙江电力2024，Vol.43Issue(6)：61-68,8.DOI:10.19585/j.zjdl.202406007
适用于弱电网的三电平并网逆变器模型预测控制
Model predictive control of three-level grid-connected inverters for weak power grids
摘要
Abstract
In weak power grids,grid-connected inverters often suffer from poor robustness and significant harmon-ics.Moreover,model predictive control(MPC)heavily relies on system parameters,limiting its applicability in weak grids.To address these issues,a data-driven model-free predictive control(MFPC)strategy base on virtual voltage vectors for neutral-point clamped(NPC)three-level grid-connected inverters is proposed.Firstly,the MFPC based on virtual voltage vectors constructs numerous virtual voltage vectors through different switching sequences.Then,a cost function is utilized to pre-select and reduce the computational burden of the control algorithm.Finally,appropriate switching sequences are chosen for optimization to suppress neutral-point voltage fluctuations.Simula-tion results demonstrate that the proposed strategy effectively mitigates neutral-point voltage fluctuations and grid current harmonics,while exhibiting robustness to parameter variations.关键词
弱电网/NPC型三电平逆变器/数据驱动型模型预测控制/鲁棒性Key words
weak grid/NPC three-level inverter/data-driven model predictive control/robustness引用本文复制引用
赵磊磊,牟伟,宋慧庆,张民,王珊..适用于弱电网的三电平并网逆变器模型预测控制[J].浙江电力,2024,43(6):61-68,8.基金项目
山东省自然科技基金面上项目(ZR2022ME214) （ZR2022ME214）
烟台汽车工程职业学院规划课题研究项目(YTQC2022ZRKX08) （YTQC2022ZRKX08）
