Dual-negative-objective Coordinated Control of Brushless Doubly Fed Induction Generator under Unbalanced Grid Voltage  

作　　者：Ming Cheng Zheng Cao Xiaoming Yan 

机构地区：[1]School of Electrical Engineering,Southeast University,Nanjing 210096,China [2]School of Electrical and Automation Engineering Nanjing Normal University,Nanjing 210023,China

出　　处：《CES Transactions on Electrical Machines and Systems》2024年第3期347-355,共9页中国电工技术学会电机与系统学报（英文）

基　　金：supported in part by National Natural Science Foundation of China under Grant 61973073;supported by Jiangsu Province Higher Education Basic Science (Natural Science) Research Project under Grant 23KJB470022

摘　　要：This article proposes a dual-negative-objective coordinated control strategy for brushless doubly fed induction generator(BDFIG)based wind power generation system under unbalanced grid voltage.To alleviate the mechanical stress and impaction on rotating shaft,the negative control objective(NCO)of machine side converter(MSC)is set to suppress the ripple of electromagnetic torque.While the NCO of grid side converter(GSC)is selected to suppress the oscillation of total output active power or the unbalanced degree of total output current for BDFIG generation system.In comparison with traditional single converter control scheme of the MSC or GSC,dual NCOs can be satisfied at the same time due to the enlarged freedom degree in the proposed improved coordinated control system for back-toback converters.The effectiveness of proposed control strategy is validated by simulation and experimental results on a dual-cagerotor BDFIG(DCR-BDFIG)prototype.

关 键 词：Brushless doubly fed induction generator Dual-negative-objective Freedom degree Unbalanced grid voltage 

分 类 号：TM346[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]