摘要
本文基于频闪映射推导了在无源阻尼和PI控制下LCL型并网逆变器的离散模型,得出了并网逆变器的折叠图和分岔图,基于折叠图和分岔图分析了PI调节器中比例系数kp以及积分系数ki对并网逆变器电气性能的影响,通过Matlab/Simulink下的仿真结果与相同参数下折叠图的对比,验证了用折叠图分析LCL型并网逆变器稳定性的正确性。并依据分岔图给定了保证LCL型并网逆变器稳定的PI调节器的参数范围,为三阶LCL型并网逆变器参数设计提供了理论参考。
The discrete model of the grid-connected inverter with LCL filter under the passive damping and PI control is built based on the stroboscopic map. Using the discrete model, the folded diagrams and the bifurcation diagrams of the grid-connected inverter are got. Effects of the proportional coefficient kpand integral coefficient ki of the PI controller on the system performance are analyzed by folded diagram and bifurcation diagram. The correctness of the stability analysis for the grid-connected inverter with LCL filter is verified by the contrast of the folded diagrams with the simulations by Matlab/Simulink. What's more, the ranges of the PI controller's parameters making the grid-connected inverter with LCL filter stable are obtained based on the bifurcation diagram. The theoretical guidance can be provided for the design of the grid-connected inverter with LCL filter.
出处
《电工技术学报》
EI
CSCD
北大核心
2014年第S1期250-256,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金青年科学基金(批准号:51007004)
北京高等学校青年英才计划项目(批准号:YETP0569)
北京市自然科学基金(批准号:3142015)资助的课题
关键词
频闪映射
LCL型并网逆变器
PI调节器
折叠图
分岔图
Stroboscopic map,grid-connected inverter with LCL filter,PI controller,folded diagram,bifurcation diagram
