大气影响下激光无线能量传输接收端多场耦合特性  

Multi-Field Coupling Characteristics of Laser Wireless Power Transmission Receiving End Under Atmospheric Influence

作　　者：侯一超 孟宪龙 张璞 郑澳洲 刘存良[1,2] Hou Yichao;Meng Xianlong;Zhang Pu;Zheng Aozhou;Liu Cunliang(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,Shaanxi,China;Shaanxi Key Laboratory of Thermal Science in Aero-Engine System,Xi’an 710072,Shaanxi,China)

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072 [2]陕西省航空动力系统热科学重点实验室,陕西西安710072

出　　处：《光学学报》2024年第12期145-155,共11页Acta Optica Sinica

基　　金：国家自然科学基金(52176205);陕西省创新能力支撑计划(2023-CX-TD-19)。

摘　　要：通过比尔定律和功率谱反演法计算得到激光束在大气传播过程中所产生的大气衰减和大气湍流的影响,进而获得激光到达接收端时的光场分布,同时基于非线性回归和实验研究获得光伏电池模型的基本参数,构建中远距离下的激光无线能量传输系统接收端多物理场模型,并通过仿真分析在经历不同湍流强度大气传输之后接收端的光-电-热多场耦合特性。结果表明,大气对激光传输造成严重的影响,使得接收端前的光场分布发生严重畸变,进而使得激光无线能量传输接收端光伏电池的输出功率以及光电转换效率呈现下降趋势,大气湍流折射率结构常数由C_(n)^(2)=2×10^(-15)m^(-2/3)增大至C_(n)^(2)=2×10^(-13)m^(-2/3)时,接收端的最大功率下降了0.054 W,光电转换效率下降了1.51%。同时,不同波长的激光束、传输距离、大气湍流强度等是制约激光无线能量传输系统效率的重要因素,激光无线能量传输系统接收端的光-电-热多场耦合特性分析,对于激光无线能量传输系统的设计和改进具有重要意义。Objective The primary obstacle currently impeding the widespread adoption of laser wireless power transmission(LWPT)lies in the challenge associated with long-distance power transport and efficient conversion.As laser beams propagate through the atmosphere,they produce a series of linear and nonlinear effects.The energy carried by the laser is absorbed or scatted by atmospheric gas molecules and aerosol particles.Atmospheric turbulence induces light intensity fluctuation,beam jitter,beam spreading,and variation of arrival angle.The light field at the receiving end is directly influenced.The receiving end is generally composed of multiple photovoltaic cells in series and parallel,and its output characteristics are directly affected by the light field.At the same time,a portion of the laser energy is converted into electrical energy,while the rest is converted into heat energy,influencing the temperature distribution at the receiving end.The light field,electric field,and heat transfer characteristics of the LWPT receiving end interact and constrain each other.Therefore,studying the multi-field coupling characteristics of photovoltaic cells at the receiving end is meaningful.Our study provides a reference for the design and optimization of LWPT systems.Methods We utilize an LWPT experimental platform to obtain the output characteristics of photovoltaic cells.The data is processed through multiple nonlinear regression to obtain the undetermined coefficients C_(1),C_(2),and C_(3),series resistance Rs,and ideality factor n in the I-V equation.The fitting results closely align with the experimental data.Beer’s law is used to compute the transmission efficiency of three different laser wavelengths through the atmosphere.The power spectrum inversion method is used to simulate the light field distribution in front of the receiving end under different turbulence structure constants,and the light field distribution is used as the source to solve the partial differential equation using finite element analysis software to o

关 键 词：大气光学 激光无线能量传输 大气湍流 多场耦合 I-V特性 

分 类 号：TM724.3[电气工程—电力系统及自动化]