南方电网技术2024，Vol.18Issue(11)：1-12,47,13.DOI:10.13648/j.cnki.issn1674-0629.2024.11.001
LCL型并网逆变器有源阻尼叠加的控制策略
Control Strategy of Active Damping Superposition for LCL Grid-Connected Inverter
摘要
Abstract
LCL filter has superior high-frequency harmonic suppression capability,and therefore it has been widely used in grid-connected inverters.In order to suppress the resonance peak problem of LCL filters,active damping is usually used.Although the resonance peak is suppressed by this control strategy,the digital control delay can cause the inherent resonance point to shift.To solve these problems,a control strategy of active damping superposition based on the virtual impedance model is proposed,which not only suppresses the resonance peak but also avoids the shift of the inherent resonance point,and expands the effective damping zone to(0,fs/3).Finally,the simulation system of LCL single-phase grid-connected inverter and the hardware in-loop prototype are built to verify the correctness of the control strategy.The experimental results show that the control strategy has good anti-interference abil-ity,dynamic performance and steady performance.关键词
LCL滤波器/虚拟阻抗/阻尼叠加/有效阻尼区Key words
LCL filter/virtual impedance/damping superposition/effective damping zone分类
动力与电气工程引用本文复制引用
张声淇,陈冬冬,洪卫东,沈谢林,林弘毅..LCL型并网逆变器有源阻尼叠加的控制策略[J].南方电网技术,2024,18(11):1-12,47,13.基金项目
福建省自然科学基金资助项目(2022J01514). Supported by the Natural Science Foundation of Fujian Province(2022J01514). （2022J01514）
