摘要
由光伏电池的光伏特性知,随着光照强度和环境温度的变化,其最大功率点也随之改变.为了能够实时监测跟踪到光伏系统最大功率点,采用一种改进的滑模变结构控制方法进行最大功率点跟踪.该方法在传统滑模变结构控制的滑模面选择基础上加入积分运算,并且把指数趋近律与等效控制相结合.最后,通过仿真可以看出,相比传统的滑模变结构控制,该方法减小了稳态误差,使系统更加稳定,同时,加快了跟踪速度,使跟踪时间缩短了0.025 s.
As is known by the photovoltaic properties of photovoltaic cell, with the change of light intensity and ambient temperature, the maximum power point of photovohaic systems has changed. In order to be capable of real- time monitoring and tracking of the maximum power point of photovoltaic systems, an method of improved sliding mode control is used to track the maximum power point. Based on the traditional sliding mode control, this method is designed by adding integral operation into the sliding mode surface, combining with exponential reaching law and the equivalent control. Finally, through the simulation we can find that, compared to traditional variable structure control, which reduces the steady-state error, make the system more stable, meanwhile it also has accelerated the tracking speed and shortened the tracking time by 0. 025 s.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2016年第4期106-111,共6页
Journal of Harbin University of Science and Technology
基金
2014-МНТЦB-1375莫斯科国际科学技术中心科研项目
关键词
光伏特性
最大功率点跟踪
滑模变结构控制
photovoltaic properties
maximum power point tracking
sliding mode control
