事件触发改进一致性算法的孤岛运行多逆变器微电网系统分布式二次调频方法
Event-triggered Improved Consensus Algorithm Distributed Secondary Frequency Regulation of Multi-inverter Microgrid Systems With Islanded Operation
董家伟 1龚春阳 2包俊 3朱国忠 4王志新1
作者信息
- 1. 上海交通大学电子信息与电气工程学院,上海市 闵行区 200240
- 2. 上海电力大学电气工程学院,上海市 浦东新区 200090
- 3. 上海禧龙科技股份有限公司,上海市 金山区 201517
- 4. 上海正泰电源系统有限公司,上海市 松江区 201614
- 折叠
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.
Abstract
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.
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Key words
islanded microgrid/distributed secondary frequency regulation/improved consensus algorithm/event triggered/Lyapunov function引用本文复制引用
基金项目
国家重点研发计划(2018YFB1503000)
国家重点研发计划(2018YFB 1503001)
上海市科委科技项目(2018YFB1503000)
上海市科委科技项目(2018YFB1503001)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据