摘要
随着光伏组串式逆变器功率的不断提升,对最大功率点跟踪(Maximum Power Point Tracking,MPPT)侧电流传感器的热设计提出了更高要求。为了解决铜排在MPPT侧电流传感器中的发热问题,文章基于传热学原理和铜排的电热耦合特性,建立了精确的数学模型,并提出了一种铜排温升的理论计算方法。首先,利用ANSYS有限元分析软件,建立了铜排的热仿真模型,对铜排温升进行了数值模拟;然后,搭建了实验平台,对铜排实际温升进行了测量。通过对比理论计算结果、仿真结果和实验数据,发现三者具有良好的一致性,最大误差控制在3%以内。这表明本文提出的热模型和理论计算方法是准确、可靠的,可为大量程电流传感器的热设计提供重要参考。
The increasing power of inverters for photovoltaic(PV)strings imposes higher requirements for the thermal design of maximum power point tracking(MPPT)current sensors.This paper focuses on the heating issue associated with copper busbars in MPPT current sensors.Firstly,a precise mathematical model was established based on heat transfer theory and considering the electro-thermal coupling characteristics of copper busbars,creating a method for theoretically calculating temperature rise in these busbars.Next,ANSYS finite element analysis software was used to develop a thermal simulation model to numerically simulate temperature rise in them.Subsequently,an experimental platform was built to measure their actual temperature rise.The experimental data showed good agreement with the numerical simulation and theoretical calculation results through a comparison,with a maximum error of less than 3%,verifying the accuracy and reliability of the proposal thermal model and theoretical calculation method.The study findings provide an important reference for the thermal design of wide-range current sensors.
作者
任浩
张诚
王雷
金波
刘丹
REN Hao;ZHANG Cheng;WANG Lei;JIN Bo;LIU Dan(Ningbo CRRC Times Transducer Technology Co.,Ltd.,Ningbo,Zhejiang 315021,China)
出处
《控制与信息技术》
2025年第2期121-126,共6页
CONTROL AND INFORMATION TECHNOLOGY
基金
国家重点研发计划项目(2022YFB3207703)。
关键词
光伏发电系统
电流传感器
铜排温升
电热耦合
热仿真
photovoltaic(PV)power generation system
current sensor
temperature rise in copper busbar
electro-thermal coupling
thermal simulation
