摘要
针对光伏微网并网系统提出了一种分布式协同控制策略。该策略通过搭建一个环形通信结构,实现各个光伏逆变系统之间的信息共享,实现分布式控制。整个控制系统分为2层,上层控制策略为协同跟踪控制;下层控制针对单个光伏单元控制器鲁棒性能较差等问题,设计H_∞控制器。这种策略使光伏发电并网单元收敛和运行在同样的可用功率输出比上,确保分布式光伏发电系统的稳定。最后,通过Matlab/Simulink搭建了仿真平台,验证了所提出控制策略的有效性。
A distributed cooperative control method for the multiple photovoltaic grid-connected system wasproposed. It was based on a ring communication structure through which the control messages were shared betweenthe PV nodes. The control system was based on a two-level control strategy. The upper layer control strategy was toorganize all the PV nodes to work cooperatively to track the reference power of the grid for the whole system. For asingle PV node,the lower layer control used the H infinity control algorithm to solve the problem of weak robustness.On the base of such a control strategy,the output powers of all the PV systems were of the same ratio compared totheir maximum power,and the distributed multiple photovoltaic grid-connected system was kept stable. The feasibilityof such a method is proved by simulation in Matlab.
作者
瞿丽
杨富文
邱全伟
QU Li;YANG Fuwen;QIU Quanwei(Institute of Information Science and Engineering,East China University of Science and Technology,Shanghai 200030,China;Griffith School of Engineering,Griffith University,Gold Coast Campus,QLD 4222,Australia)
出处
《电气传动》
北大核心
2016年第9期44-47,65,共5页
Electric Drive
关键词
光伏并网发电系统
H∞控制器
环形通信网络
协同控制
分布式控制
photovoltaic grid-connected system
H infinity controller
ring communication structure
cooperative control
distributed control
