基于ACPI控制的光伏系统MPPT策略  

MPPT Strategy of Photovoltaic System Based on Auto-coupling PI Control

作　　者：喻乐言 曾喆昭[1] 张昌琪 YU Leyan;ZENG Zhezhao;ZHANG Changqi(School of Electrical and Information Engineering,Changsha University of Science&Technology,Changsha 410076,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410076

出　　处：《动力工程学报》2024年第8期1226-1233,共8页Journal of Chinese Society of Power Engineering

基　　金：湖南省教育厅重点资助项目(21A0183)。

摘　　要：针对现有光伏系统最大功率点跟踪(MPPT)方法中存在的响应速度慢、抖振明显和外界环境发生变化时稳态精度低等问题,提出了一种基于自耦比例积分微分(ACPID)控制的自耦PI控制策略。该策略首先基于Boost升压电路的光伏系统通过坐标变换简化被控系统,同时引入虚拟控制量将光伏发电系统分解为外环电压控制与内环电流控制,并将所有内部动态和外部扰动定义为总扰动,进而将其等价映射为一个线性扰动系统;然后在自耦PID控制系统的思想上,分别设计了外环与内环的自耦PI控制器。结果表明:所提控制方法可以实现光伏系统MPPT的有效控制,不仅具有较快的响应速度、良好的抗抖振能力,而且对于外界环境变化具有良好的鲁棒性。In order to solve the problems of slow response speed,noticeable chattering and low steady-state accuracy when the external environment changes in the maximum power point tracking(MPPT)method of photovoltaic system,the auto-coupling PI control strategy based on auto-coupling PID(ACPID)control was proposed.Based on the photovoltaic system of Boost circuit,it simplified the controlled system with coordinate transformations.At the same time,the strategy introduced virtual control volumes to divide the system into outer loop voltage control and inner loop current control,and it defined internal dynamic and external disturbances as total disturbance,which equivalently mapped the photovoltaic power generation system as a linear perturbation system.And the auto-coupling PI controllers of outer loop and inner loop were designed based on the auto-coupling PI control system.Results show that the proposed method can realize the effective MPPT control of the photovoltaic system and has the faster response speed,good anti-chattering ability and good robustness to external environmental changes.

关 键 词：光伏系统 MPPT ACPI控制 鲁棒性 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]