电力系统保护与控制2025，Vol.53Issue(15)：27-35,9.DOI:10.19783/j.cnki.pspc.241444
并网变换器电流传感器故障模型预测容错控制策略
Model prediction fault-tolerant control strategy for grid-connected converters with current sensor faults
摘要
Abstract
To address the issues of AC current sensor faults in grid-connected converters and unobservable regions in model predictive fault-tolerant control and high total harmonic distortion(THD)in the grid current,a model prediction fault-tolerant control strategy based on DC bus current reconstruction is proposed.First,according to the system structure of the grid-connected converter,the current prediction model is established.Then,the relationship between DC bus current and phase current under different voltage vectors is derived.The reconstruction principle of the three-phase current is analyzed,and the unobservable region of model predictive control during grid current sampling is clarified.Considering the relationship between the voltage vector action time and the minimum sampling time,virtual voltage vector set which can eliminate the unobservable region is designed and the fault-tolerant model predictive control strategy for grid-connected converters is proposed.The optimal vector is selected from the virtual vector set to achieve AC current sensor fault-tolerant model predictive control and reduce the total harmonic distortion of the grid current.Finally,experimental results verify the effectiveness of the proposed control strategy.关键词
并网变换器/电流传感器故障/模型预测控制/电流重构/虚拟矢量Key words
grid-connected converter/current sensor fault/model predictive control/current reconstruction/virtual vector引用本文复制引用
金楠,刘家熙,李海龙,郭磊磊..并网变换器电流传感器故障模型预测容错控制策略[J].电力系统保护与控制,2025,53(15):27-35,9.基金项目
This work is supported by the National Natural Science Foundation of China(No.U2004166). 国家自然科学基金项目资助(U2004166) （No.U2004166）
河南省高校科技创新团队支持计划项目资助(22IRTSTHN017) （22IRTSTHN017）
