摘要
针对局部遮荫或者不同特性光伏组件组合的光伏发电系统,提出一种基于模拟定位电路的多峰值最大功率点跟踪方法。采用硬件模拟定位电路和软件数字控制算法相结合的方式,先利用定位电路在极短的时间内准确地找到多峰值情况下的全局最大功率点,再选择相应的控制算法进行跟踪调节和保持稳定,最终实现光伏发电系统的最大功率输出。与传统功率曲线扫描方法相比,该方法不需要使用高速的AD转换电路,对后级控制电路的扰动小,并且对系统工作效率的影响也非常小。仿真和实验的研究结果表明所提方法易于实现,稳定可靠。
A method of multi-peak MPPT（Maximum Power Point Tracking） is proposed for power generation system with photovoltaic modules partially shaded or of different characteristics,which,in hardware,applies the analog locating circuit to accurately and quickly find the globally maximum power point under the conditions of multiple peaks and, in software, chooses the relevant control algorithms to maintain it stable by tracking and adjustment for the maximum power output of photovoltaic power generation system. Compared with the conventional method of power curve scanning,the proposed method avoids the use of high-speed AD conversion circuit,resulting in slight disturb to following control circuits and little impact on system efficiency. Simulative and experimental results show that it is stable ,reliable and easy to implement.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第10期16-21,共6页
Electric Power Automation Equipment
基金
台达环境与教育基金会电力电子科教发展计划重点资助项目(DREM200902)
国家电网公司科技项目~~
关键词
光伏
发电
模拟定位电路
多峰值
MPPT
photovohaic
electric power generation
analog locating circuit
multi-peak
MPPT
