摘要
随着光伏产业的不断发展,为了提高光伏板的发电量以及电站的发电量,基于一种新型的光伏电池板双轴跟踪支架,提出了以现场可编程逻辑门阵列(FPGA)控制芯片为核心的跟踪控制系统。采用天文学计算法和光电传感器模拟量修正法,共同计算太阳光的方位角和高度角;再根据光伏板位置给定与反馈的数学关系,得到三相脉冲控制信号。采用工作过程分时控制两个电机的正、反转,使得太阳光始终垂直于电池板平面,实现了对太阳光照角度的实时跟踪。最后,采用PVsyst软件进行仿真分析,并以我国新疆地区某项目为例,将实测数据与仿真结果进行对比。对比结果表明:该控制系统能准确地跟踪太阳光,验证了系统方案设计的有效性。相比于固定方式,采用该双轴跟踪系统可将光伏电站发电量增加30%以上。该系统在后续的工程项目中可进行推广应用,增加光伏电站的收益。
With the continuous development of photovoltaic industry,in order to improve the power generation of photovoltaic panels and power stations,the tracking control system based on field programmable gate array(FPGA)control chip is proposed based on a new type of photovoltaic panel dual axis automatic tracking bracket.The azimuth and altitude angles of sunlight are calculated by astronomical calculation method and photoelectric sensor analog correction method.Then,according to the mathematical relationship between the positions of photovotaic(PV)panel and feedback,three phase pulse control signal is obtained.The forward and reverse rotation of the two motors are controlled by time sharing in the working process.The sunlight is always perpendicular to the plane of the panel,which realizes the real-time tracking of the sunlight angle.Finally,a project in Xinjiang is taken as an example,the measured data results are compared with the simulation results based on PVsyst software.The Comparison results show that the control system can accurately track the sunlight,which verifies the effectiveness of the system design.Compared with the fixed mode,the photovoltaic power generation can be increased by more than 30%using the dual axis automatic tracking system.The system can be applied in the following engineering projects,and can increase the revenue of photovoltaic power station.
作者
孙婷
赵子涵
赵永彬
SUN Ting;ZHAO Zihan;ZHAO Yongbin(SAC New Energy Engineering Technology Co.,Ltd.Nanjing 210000,China;Nanjing Jinling High School,Nanjing 210005,China)
出处
《自动化仪表》
CAS
2021年第6期91-95,共5页
Process Automation Instrumentation
关键词
现场可编程门阵列
光电传感器
分时控制
比例积分调节器
脉冲宽度调制
三相全桥电路
PVsyst
双轴自动跟踪系统
Field programmable gate array(FPGA)
Photoelectric sensor
Time sharing control
Propotion integral(PI)regulator
Pulse width modulation(PWM)
Three phase full bridge circuit
PVsyst
Dual axis automatic tracking system
