摘要
为了使交流电网的输出电流能够更好地跟踪电网电压,并实现最大功率点跟踪控制,分析了光伏并网逆变器的工作原理与控制原理,讨论了自抗扰控制器的控制和参数整定。在此基础上,设计了一种基于自抗扰控制器的并网逆变器电流跟踪控制方法。通过对电流的闭环跟踪控制,实现了单位功率因数运行并向电网馈送电能和电网电流对电网电压的跟踪。实验研究结果表明,采用自抗扰控制器,输出电流、电压稳定快速、超调小,能有效抑制各种扰动,而且系统的启动性能与稳定性能都要优于常规控制器,从而提高了系统的鲁棒性。
In order to realize the effective following of output current along grid voltage and the maximum power point tracking,the working principle and control principle of PV grid-connected inverter are analyzed and the control and parameter setting of ADRC（Auto Disturbance Rejection Controller） are discussed.A current tracking control scheme based on ADRC is then designed for PV grid-connected inverter.The closed-loop current is tracked and controlled to realize the unity power factor operation,feed electricity to grid and make the grid current following along grid voltage.Experimental results show that,the ADRC suppresses various disturbances effectively and quickly,and the performance of system startup and stability are superior to conventional controllers.
出处
《电力自动化设备》
EI
CSCD
北大核心
2012年第3期104-108,共5页
Electric Power Automation Equipment
基金
湖南省教育厅科研项目(09C261)~~
关键词
并网
逆变器
自抗扰控制
电流控制
鲁棒性
grid-connection
electric inverters
ADRC
electric current control
robustness
