光伏系统稳态无振荡扰动观察MPPT研究  

RESEARCH OF STEADY STATE WITHOUT OSCILLATION IN PERTURB AND OBSERVE MAXIMUM POWER POINT TRACKING OF PV SYSTEM

作　　者：李向丽[1] 闫朝阳[1] 高燕妮[1] 漆汉宏[1] 孙孝峰[1] Li Xiangli Yan Zhaoyang Gao Yanni Qi Hanhong Sun Xiaofeng(Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, Yanshan University, Qinhuangdao 066004, Chin)

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,秦皇岛066004

出　　处：《太阳能学报》2016年第12期3014-3021,共8页Acta Energiae Solaris Sinica

基　　金：河北省自然科学基金(E2014203091);河北省科学技术研究与发展项目(11213943)

摘　　要：针对传统扰动观察法在光伏系统最大功率点跟踪时的不足,提出一种新型扰动观察法。该方法利用在最大功率点两侧,参考电压的前后压差符号发生变化的特性进行变步长控制。采用这种方法可消除定步长扰动观察法在最大功率点处产生的振荡,实现稳态功率无脉动,优化电能质量,方案简单易于实现。基于单级式光伏并网系统对该算法进行仿真研究和实验验证。实验结果表明,该方法具有较好的跟踪精度和响应速度。Aiming at the shortcoming of conventional perturbation and observation （P＆O） in maximum power point tracking for PV system, an improved method was proposed, which used the change characteristics of the symbols of reference voltage differences on both sides of maximum power point to carry on variable step size control. The method could eliminate the oscillation in maximum power point caused by fixed step size P＆O, realize steady state power and optimize the quality of electricity. This scheme was simple and easy to realize. The simulation and experiment research of the new algorithm were made in single-stage grid-connected PV system. The experimental results show that the method has good tracking precision and response speed.

关 键 词：光伏系统 最大功率点跟踪 扰动观察法 振荡 

分 类 号：TM615[电气工程—电力系统及自动化]