中国电机工程学报2025，Vol.45Issue(11)：4458-4468,11.DOI:10.13334/j.0258-8013.pcsee.241014
电网电压不平衡条件下永磁电机无电解电容驱动系统网侧电流谐波抑制方法
Suppression Strategy of Grid-side Current Harmonics for Electrolytic Capacitor-less Permanent Magnet Motor Drives Under Unbalanced Grid Voltage
摘要
Abstract
The grid-side current distortion is severe in the electrolytic capacitor-less motor drive under the unbalanced grid condition.This paper proposes a grid current harmonics suppression strategy based on the rectified voltage full-feedforward.Through analyzing the variation of the rectifier bridge conduction angle,the mechanism of the change in harmonics of the input voltage and inductor current is clarified.The interaction between the rectified voltage and inductor current is revealed by establishing the small-signal model of the inductor current.The rectified voltage full-feedforward function incorporating power flow variations under the unbalanced grid condition is constructed which reshapes the equivalent output impedance of the drive on the grid side.Then the rectified voltage disturbance terms in the control loop of the inductor current are decoupled.By constructing the equivalent Norton circuit of the drive and applying the stability criterion of the cascade system,the stability of the drive after applying the control strategy is verified.The proposed control strategy has solved the tough problem of the regular inductor current control strategy in suppressing grid current harmonics under unbalanced grid condition.Finally,the effectiveness of the proposed control strategy is validated through experiments conducted on the electrolytic capacitor-less motor drive.关键词
永磁同步电机/无电解电容/不平衡电网/网侧电流谐波/整流电压全前馈Key words
permanent magnet synchronous motor(PMSM)/electrolytic capacitor-less/unbalanced grid/harmonics of grid currents/rectified voltage full-feedforward分类
信息技术与安全科学引用本文复制引用
丁大尉,谢辉,王高林,李斌兴,徐殿国..电网电压不平衡条件下永磁电机无电解电容驱动系统网侧电流谐波抑制方法[J].中国电机工程学报,2025,45(11):4458-4468,11.基金项目
国家自然科学基金项目(52207042) （52207042）
台达电力电子科教发展计(DREG2023005) （DREG2023005）
中国科协青年人才托举工程(2023QNRC001).Project Supported by National Natural Science Foundation of China(52207042) （2023QNRC001）
Delta Power Electronics Science and Education Development Program(DREG2023005) （DREG2023005）
Young Elite Scientists Sponsorship Program by CAST(2023QNRC001). （2023QNRC001）
