摘要
【目的】解决光伏灌溉系统中水资源浪费、系统效率低等问题。【方法】本文提出一种基于物联网技术的光伏灌溉系统,实时检测节点处土壤湿度,通过Zigbee技术将检测值传回物联网平台,平台根据设定阈值控制执行机构完成灌溉;针对光伏水泵系统组最大功率点跟踪(MPPT)算法存在的缺陷,提出自适应扰动观察法,通过Matlab/Simulink对算法模拟仿真。【结果】自适应扰动观察法较定步长扰动观察法追踪速度提升340%,在最大功率点处系统功率损失较低;对稻田和棉花田2种作物土壤湿度进行灌溉控制,其中稻田误差值控制在±3%、棉花田误差值控制在±2%,达到预期效果。【结论】本灌溉系统具有成本低、效率高的优点,通过物联网技术,系统更加符合使用需求,可以远程监控农作物状态,实现农业智能化。
【Objective】PV irrigation system is a new technology that has seen an increased application in helping irrigation management in China.The purpose of this paper is to propose a method to increase water use efficiency and operation efficiency of the PV system.【Method】The photovoltaic irrigation system we studied was based on the IOT technology.It detects soil moisture at nodes in real time,transmits the detection value to the IOT platform through a zig-bee technology.The platform controls the actuator to complete irrigation based on a pre-set threshold.For alleviating the disadvantage of the maximum power point tracking(MPPT)algorithm traditionally used for photovoltaic water pumping system,we proposed an adaptive disturbance observation method and solved it using Matlab/Simulink.【Result】The adaptive perturbation observation method improved the tracking speed by 340%,compared with the fixed-step perturbation observation method,and reduced the system power at the maximum power point.Application to a paddy field and a cotton field showed that the adaptive method can control soil moisture in the paddy field with±3%error,and in the cotton field with±2%error.【Conclusion】The proposed adaptive irrigation system has the advantages of low cost and high efficiency.Through the internet technology,the system can be used to remotely monitor soil moisture status of cropping fields and realize intelligent irrigation.
作者
施允洋
李玉龙
房开拓
刘方方
SHI Yunyang;LI Yulong;FANG Kaituo;LIU Fangfang(Suqian College,Suqian 223800,China)
出处
《灌溉排水学报》
CAS
CSCD
北大核心
2022年第9期71-76,共6页
Journal of Irrigation and Drainage
基金
宿迁市科技计划项目(K202114)
江苏高校自然科学研究计划项目(20KJB210013)。
关键词
ZIGBEE
扰动观察法
光伏灌溉
物联网
Zigbee
perturbation observation method
photovoltaic irrigation
Internet of Things
