摘要
针对孤岛微电网中存在通信延迟的频率恢复问题,研究了孤岛式微电网的分布式二次频率控制,提出了一种最优分布式控制策略。该策略的显著特征在于考虑了所设计的控制器中存在通信延迟的情况,通过在最优分布式控制中加入延迟补偿项,进一步降低了对通信网络的依赖。与传统控制方法相比,所提策略在有限时间内消除了频率偏差并实现了有功功率分配,系统的可靠性得到了进一步提高。最后在MATLAB/Simulink环境下构建了由4个分布式电源(distributed generator,DG)单元组成的孤岛微电网测试系统仿真模型,仿真结果验证了所提策略的有效性。
For the frequency recovery problem involving communication delay in isolated microgrid,the distributed secondary frequency control of isolated microgrid is studied,and an optimal distributed control strategy is presented.The salient feature of the strategy is that the communication delay in the designed controller is considered.By adding delay compensation into the optimal distributed control,the dependence on the communication network is further reduced.Compared with the traditional control method,the proposed strategy eliminates the frequency deviation in a limited time and realize the active power distribution,the reliability of the system has been further improved.Finally,in the MATLAB/Simulink environment,a simulation model of isolated island microgrid test system consisting of four distributed generator(DG) units is constructed,and the simulation results verify the effectiveness of the proposed strategy.
作者
冯宜伟
刘顺民
FENG Yiwei;LIU Shunmin(School of Electrical Engineering and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《控制工程》
CSCD
北大核心
2024年第9期1561-1571,共11页
Control Engineering of China
基金
甘肃省科技计划资助项目(22ZD11GA314,23ZDGA007)
国家自然科学基金资助项目(62141304)
甘肃省产业支撑计划项目(2024CYZC-18)。
关键词
通信延迟
二次频率控制
分布式最优控制
有限时间稳定
孤岛微电网
Communication delay
secondary frequency control
distributed optimal control
finite time stability
island microgrid
