中国电机工程学报2025，Vol.45Issue(22)：8718-8729,中插4,13.DOI:10.13334/j.0258-8013.pcsee.241845
并网逆变器死区耦合谐波源建模
Dead-time Coupling Harmonic Source Modeling of Grid-connected Inverters
摘要
Abstract
A large number of renewable energy generation systems have been integrated into the electrical power systems through grid-connected inverters.To prevent shoot-through of inverter arms,the dead time needs to be applied,which introduces irrepressible dead-time low-order harmonics.In addition,due to the frequency coupling effect caused by control characteristics of the inverters,inherent harmonics can generate additional harmonic components.However,existing studies have neglected frequency coupling effects in dead-time harmonic modeling.Therefore,this paper first analyzes the mechanism of asymmetric frequency coupling effects and dead-time effects.Then the transmission process of dead-time harmonic voltages in the outer loop,inner loop,phase-locked loop,etc.,of grid-connected inverters are analyzed to establish a model of dead-time coupling harmonic sources for grid-connected inverters.By using both time-domain and hardware-in-the-loop simulation platforms,comparisons have been conducted with models established in other literature,which validate the proposed model.Finally,the effects of different control parameters and operating parameters on the model are considered,and the characteristics of the model under different conditions are analyzed.关键词
并网逆变器/死区谐波/频率耦合效应/谐波源建模Key words
grid-connected inverter/dead-time harmonics/frequency coupling effect/harmonic source modeling分类
信息技术与安全科学引用本文复制引用
TAO Shun,ZHU Xinyi,CHEN Huilin,XU Yonghai..并网逆变器死区耦合谐波源建模[J].中国电机工程学报,2025,45(22):8718-8729,中插4,13.基金项目
国家自然科学基金项目(52377101). Project Supported by National Natural Science Foundation of China(52377101). （52377101）
