基于稳态无振荡INC的MPPT控制策略  

MPPT control strategy based on steady state non-oscillating conductance increment algorithm

作　　者：李畸勇[1,2] 张伟斌 武泽中 卢瀚文 冯端正 LI Ji-yong;ZHANG Wei-bin;WU Ze-zhong;LU Han-wen;FENG Duan-zheng(College of Electrical Engineering,Guangxi University,Nanning Guangxi 530004,China;Guangxi Key Laboratory of Power System Optimization and Energy Technology,Nanning Guangxi 530004,China)

机构地区：[1]广西大学电气工程学院,广西南宁530004 [2]广西电力系统最优化与节能技术重点实验室,广西南宁530004

出　　处：《电源技术》2021年第2期217-221,共5页Chinese Journal of Power Sources

基　　金：广西自然科学基金项目(2014GXNSFAA-118372);广西研究生教育创新计划资助项目(YCSW-2017026)。

摘　　要：针对电导增量法(INC)不能同时解决跟踪速度和稳态振荡问题,提出了一种基于INC的改进型稳态无振荡控制策略。首先启动阶段采用定电压跟踪,加快系统向最大功率点逼近速度;其次利用参考电压在连续两次扰动调整后压差符号变化情况对变步长进行控制,消除INC在最大功率点来回振荡问题,实现稳态零波动输出,从而解决了INC在最大功率点跟踪过程中兼顾跟踪速度和稳态精度矛盾问题。仿真结果表明该改进型控制策略不仅可以解决系统稳态波动问题,而且在动态性能方面也有一定的提升。Aiming at the problem that incremental conductance method(INC)cannot solve the tracking speed and steady-state oscillation at the same time,an improved steady-state oscillation-free control strategy based on the incremental conductance algorithm was proposed.Firstly,constant voltage tracking method was used to speed up the system approaching to the maximum power point;secondly,the step change was controlled by the change of the differential pressure sign after the reference voltage was adjusted by two consecutive disturbances,the method could eliminate the problem of the conductance increment method oscillating back and forth at the maximum power point to realize steady-state zero oscillation.Thus,the contradiction between the tracking speed and the steady-state precision in the maximum power point tracking process was solved.The simulation results show that the improved control strategy can not only solve the steady-state fluctuation problem,but also improve the dynamic performance.

关 键 词：最大功率点跟踪 稳态无振荡 电导增量法 定电压启动 

分 类 号：TM914[电气工程—电力电子与电力传动]