中国电机工程学报2024，Vol.44Issue(1)：34-45,中插3,13.DOI:10.13334/j.0258-8013.pcsee.221897
基于改进MFAC的交直流微电网分布式二次控制
Distributed Secondary Control of Hybrid AC/DC Microgrid Based on Improved Model-free Adaptive Control
摘要
Abstract
To solve the problems that the existing distributed secondary control(DSC)of AC/DC microgrid is greatly influenced by the parameters of the primary control,the communication topology of DSC is complicated,and the secondary control parameters are difficult to set,etc.,DSC of hybrid AC/DC microgrid based on improved MFAC(MFAC-DSC)is proposed.In this paper,the dynamic linearization parameters of distributed generation are estimated online by using the historical sampling data,and the traditional DSC's problem of being easily affected by the primary control parameters is solved.In order to deal with the issue of the interlinking converter communication failure,the communication network and control strategy of DSC is optimized through no communication interlinking converter.Besides,the convergence of the MFAC-DSC control system is derived,and the stable convergence condition is given.Based on a real AC/DC microgrid experimental platform,the feasibility of MFAC-DSC is verified under various operating conditions.Compared with the traditional DSC strategy,the MFAC-DSC method can effectively reduce the power fluctuation caused by the change of distributed generation's droop coefficient,and the droop coefficient can be adjusted on a larger scale.Meanwhile,it solves the problems of control failure and bus voltage offset caused by the interlinking converter communication failure.关键词
交直流微电网/无模型自适应控制/分布式二次控制/功率分配Key words
AC/DC microgrid/model-free adaptive control(MFAC)/distributed secondary control/power distribution分类
信息技术与安全科学引用本文复制引用
杨畅,郑涛,李鹏宇,卜鸣..基于改进MFAC的交直流微电网分布式二次控制[J].中国电机工程学报,2024,44(1):34-45,中插3,13.基金项目
陕西省重点研发计划项目(2019ZDLGY18-06).Key R&D Program of Shaanxi Province(2019ZDLGY18-06). （2019ZDLGY18-06）
