摘要
将无源控制(passivity-based control,PBC)这种非线性控制方法首次引入到光伏Z源并网逆变器的控制上,它无需线性化处理就能直接实现有效并网控制,且系统的控制性能优良。首先,根据光伏z源并网逆变器的E-L(Euler—Lagrange)数学模型分析其无源性,并计算得到并网侧幽轴电流解耦的无源控制律;然后,采用注入阻尼方法对控制器进行优化设计,提高系统的动态性能,并实现对给定电压及最大功率点快速跟踪;最后,在Matlab/Simulink软件仿真和硬件样机上实验验证PBC应用到光伏Z源并网逆变器控制上的可行性和有效性,相比于传统电压矢量定向的双闭环控制策略,该系统具有调节时间和上升时间都短、动态性能好、并网功率因数高等特点。
The nonlinear passivity-based control (PBC) method is firstly introduced into the control strategy of photovohaic Z-source grid-connected inverter, it can directly realize effectively grid-connected control without linearization processing, and the system has excellent control performance. Firstly, the passivity is analyzed according to the Euler-Lagrange (E-L) mathematical model of the PV Z-source grid-connected inverter, and the passive control law of the dq-axis current decoupling on the grid-connected side is calculated. Then the controller is optimally designed by injection damping method, the dynamic performance of system is improved, and the fast tracking of the given voltage and the maximum power point is realized. Finally, the feasibility and effectiveness of PBC application to the control of PV Z source grid-connected inverter are verified through experiment on Matlab/Simulink software simulation and hardware prototype, compared to the double-closed loop control strategy of traditional voltage vector orientation, the proposed system has shorter adjusting time and the rising time, better dynamic performance, and higher grid connected power factor.
作者
程启明
余德清
程尹曼
高杰
张宇
谭冯忍
Cheng Qiming1, Yu Deqing1, Cheng Yinman2, Gao Jie1, Zhang Yu1, Tan Fengren1(1. College of Automation Engineering, Shanghai University of Electric Power, Shanghai Key Laboratory of Power Station Automation Technology, Shanghai 200090, China ; 2. College of Electronics and Information Engineering, Tongji University, Shanghai 201804, China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2018年第10期2810-2820,共11页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(61304134)
上海市重点科技攻关计划(14110500700)
上海市电站自动化技术重点实验室(13DZ2273800)
“电气工程”上海市Ⅱ类高原学科
关键词
光伏
Z源并网逆变器
无源性控制
E—L模型
非线性控制
注入阻尼
photovohaic (PV)
Z- source grid- connected inverter
passivity- based control (PBC)
Euler- Lagrange model
nonlinear control
injecting damping