光伏系统MPPT方法的分析比较与改进  

Analysis and Improvement of MPPT for PV System

作　　者：云珂 杨舟[1] 杨东升[1] 杨伟[1] 朱文艳[1] 

机构地区：[1]南京理工大学自动化学院,南京210094

出　　处：《电力学报》2015年第2期111-116,共6页Journal of Electric Power

摘　　要：在光伏并网发电的过程中,由于光伏发电的不稳定性,需要对光伏电池的最大功率点进行跟踪控制,来使得电池的利用率最高,提高系统的发电效率。分析比较了MPPT各种基本方法的优缺点,基于常用算法中的不足,设计了一种双模式MPPT控制算法。是以恒定电压法和自适应变步长扰动观测法为基础,并引入防误判机制来增强系统对环境突变的适应能力。论文通过搭建模型,验证了算法的正确性和有效性。In the photovoltaic power generation process, due to the instability of power, it requires photovoltaic maximum power point tracking control, which is to improve the battery utilization and power generation efficiency. The advantages and disadvantages of various MPPT methods are analyzed and compared. And then, a new algorithms is proposed based on them, it uses a dual mode MPPT algorithm which includes constant voltage method and adaptive variable step disturbance method. It also introduces anti-misjudgment mechanism to enhance the ability of adapting to environmental catastrophe. The correctness and effectiveness of the model is verified by building simulation model.

关 键 词：光伏发电 最大功率跟踪控制 变步长 恒定开路电压法 扰动观测法 防误判机制 

分 类 号：TM615[电气工程—电力系统及自动化] TM914