摘要
随着户用离网型光伏发电技术的发展,太阳能控制器得到广泛应用.本文设计了工作在恒压模式和最大功率点跟踪模式的户用离网型太阳能控制器.首先,针对传统电导增量法所存在的振荡问题以及PID控制算法跟踪速度慢的问题,在传统电导增量法的基础上,提出了一种改进的最大功率点跟踪控制算法.其次,针对太阳能控制器输出电压的稳定问题,设计了基于Buck电路的变结构滑模控制器.最后,在Matlab/Simulink建模仿真平台上,对恒压/最大功率点跟踪两种工作模式进行了仿真,验证了所研究的太阳能控制器在太阳辐照度发生剧烈变化时仍能快速、准确地跟踪最大功率点,解决了传统电导增量法的振荡问题;并且验证了在太阳辐照度和负载分别发生变化的情况下,太阳能控制器仍能够保持输出电压的恒定.
With the development of off-grid photovoltaic technology, solar controller has been widely used. In this paper, an off-grid solar controller working in constant voltage mode and maximum power point tracking (MPPT) mode is designed. Aiming at the oscillation problem of the traditional conductance increment method and the slow tracking speed of the PID control algorithm, an improved MPPT control algorithm based on the traditional conductance increment method is proposed. Secondly, a variable structure sliding mode controller based on Buck circuit is designed to stabilize the output voltage of solar controller. Finally, on the platform of Matlab/Simulink modeling and simulation, the two working modes of constant voltage/MPPT are simulated, which verifies that the solar energy controller can track the maximum power point quickly and accurately when the solar irradiance changes dramatically, and solves the oscillation problem of the traditional conductance increment method. In addition, it verifies that the output voltage of the solar controller is constant when the solar irradiance and load change respectively.
作者
陈浩
张代润
Chen Hao;Zhang Dairun(College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065)
出处
《电气技术》
2019年第9期14-19,共6页
Electrical Engineering
