摘要
由于光伏组件输出特性具有明显的非线性,研究中需要根据光伏组件的工程模型建立其通用仿真模型。本文在对经典占空比扰动法进行深入分析的基础上,提出了一种自适应占空比扰动法;同时,利用双闭环控制方法对光伏系统的逆变进行控制;最后,通过对光伏阵列、自适应占空比扰动算法和逆变进行仿真,仿真分析结果表明,所建立的光伏阵列模型能够较好的模拟光伏阵列的特性;所提出自适应占空比扰动法,在一定程度上弥补了扰动法的不足;逆变输出的电流与电网的电压同频同相,达到了并网的要求。
The output characteristics of PV calls are no-linear. A practical model for photovoltaic cell was designed by using MATLAB/Simulink based on the engineered model of photovoltaic cell model. PV systems-perturb and observe algorithm （P＆Q） is investigated. A modified P＆Q algorithm is proposed for the improvement of P＆Q algorithm. The control of photovoltaic grid-connected system is founded by the technology of double closed-loop control. Finally a photovoltaic generation system is constructed with simulation software. Simulation results demonstrate the validity of the model of PV array can be simulated in any condition the output characteristics of PV calls .The improvement of P＆Q algorithm make the photovoltaic system quickly and track the maximum power point accurately .Besides, the output current of PV system and the voltage of public power grid with same frequency and phase through the double closed-loop control.
作者
郑俊观
王硕禾
ZHENG Jun-guan WANG Suo-he(Shijiazhuang Tiedao University Shijiazhuang Hebei 050043 Chin)
出处
《石家庄铁路职业技术学院学报》
2017年第3期72-79,共8页
Journal of Shijiazhuang Institute of Railway Technology
关键词
光伏并网系统
光伏阵列
自适应占空比扰动法
双闭环控制
photovoltaic grid-connected system pv array the improvement of MPPT algorithmdouble closed-loop control
