摘要
一致性算法常用于孤岛运行多逆变器并联微电网系统分布式二次调频控制,对逆变器之间通信的实时性要求很高。对此,该文提出基于频率补偿信号的改进一致性算法,基于频率误差越限建立事件触发机制,维持逆变器之间已有的下垂关系不变,实现孤岛运行多逆变器微电网系统二次调频。同时,基于该事件触发机制和李雅普诺夫函数,获得最短触发时间下界,完全避免了在短时间内无限次事件触发现象的发生。最后,采用MATLAB/Simulink针对包含4台逆变器并联运行的孤岛微电网系统算例进行仿真,结果表明,提出的方法相比文献采用的基本一致性算法通信量减少99%以上,最短触发时间间隔延长至数十ms量级;同时,由于该文方法不使用功率微分信号,微电网系统的动态性能更好。
Consensus algorithm is commonly used for distributed secondary frequency regulation control of multi-inverter parallel microgrid systems operating in isolation,which requires high real-time performance for communication between inverters.An improved consensus algorithm based on frequency compensation signal is adopted and an event trigger mechanism based on the frequency error crossing limit is designed,which can maintain the existing droop relationship between inverters and realize the secondary frequency regulation of a multi-inverter microgrid system operating in islanded mode at the same time.Meanwhile,based on this event triggered mechanism and Lyapunov function,the minimum trigger time lower bound is obtained,which completely avoids the phenomenon of infinite event triggers in a short period of time.Finally,MATLAB/Simulink is used to simulate the operation of an islanded microgrid system containing four inverters in parallel.The results show that the communication volume of the proposed method is reduced by more than 99%compared with the basic consistency algorithm used in the literature,and the minimum trigger time interval is extended to the order of tens of milliseconds.In the meantime,the dynamic performance of the microgrid system is better because the proposed method does not use the power differential signal.
作者
董家伟
龚春阳
包俊
朱国忠
王志新
DONG Jiawei;GONG Chunyang;BAO Jun;ZHU Guozhong;WANG Zhixin(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Minhang District,Shanghai 200240,China;College of Electrical Engineering,Shanghai University of Electric Power,Pudong New Area,Shanghai 200090,China;Shanghai Xilong Technology Co.,Ltd.,Jinshan District,Shanghai 201517,China;Shanghai Chint Power Systems Co.,Ltd.,Songjiang District,Shanghai 201614,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2024年第2期476-488,I0004,共14页
Proceedings of the CSEE
基金
国家重点研发计划项目(2018YFB1503000,2018YFB 1503001)
上海市科委科技计划项目(21DZ1207300)。
关键词
孤岛微电网系统
分布式二次调频
改进一致性算法
事件触发
李雅普诺夫函数
islanded microgrid
distributed secondary frequency regulation
improved consensus algorithm
event triggered
Lyapunov function
