基于LADRC和准PR的三相LCL型光伏并网逆变器谐波谐振抑制策略  

HARMONIC RESONANCE SUPPRESSION STRATEGY OF THREE-PHASE LCL PHOTOVOLTAIC GRID-CONNECTED INVERTER BASED ON LADRC AND QUASI PR

作　　者：周雪松[1] 郭帅朝 马幼婕[1] 李月超 马闯 Zhou Xuesong;Guo Shuaichao;Ma Youjie;Li Yuechao;Ma Chuang(College of Electrical Engineering and Automation,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学电气工程与自动化学院,天津300384

出　　处：《太阳能学报》2023年第3期465-474,共10页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金面上项目(51877152)。

摘　　要：针对三相LCL型光伏并网逆变器由自身高频段谐振尖峰引起的谐波谐振现象,设计一种基于三阶线性状态观测器的二阶线性自抗扰控制(LADRC)和准PR控制相结合的电流双闭环控制策略,较好地削弱了高频段的谐振尖峰,抑制了光伏系统的谐波谐振现象。通过设计李雅普诺夫函数证明了闭环系统最终会稳定收敛;利用仿真对不同工况下的控制策略深入对比分析,结果表明此双环控制策略具有优越的鲁棒性和实际应用价值。Aiming at the harmonic resonance phenomenon of three-phase LCL photovoltaic grid connected inverter from its high frequency resonant peak,a current double closed loop control strategy based on third-order LESO combined with second-order LADRC and quasi PR control is designed.It can better weaken the high frequency resonant peak and suppress the harmonic resonance phenomenon of photovoltaic system.By designing Lyapunov function,it is proved that the closed-loop system will eventually converge stably.The simulation results show that the double loop control strategy has superior robustness and practical application value.

关 键 词：光伏系统 LCL型逆变器 线性自抗扰 比例谐振控制 谐波谐振现象 

分 类 号：TM464[电气工程—电器]