基于FPGA的手持式光伏电池测试仪  

Portable Testing System for PV Array Based on FPGA

作　　者：刘洛[1] 曾祥斌[1] 李青[1] 陈乾坤[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《仪表技术与传感器》2010年第8期14-16,21,共4页Instrument Technique and Sensor

基　　金：国家863项目(2006AA05Z406);广东省教育部产学研结合项目(2006D90404017)

摘　　要：设计了一款基于FPGA的手持式光伏电池测试仪。相对传统的以电容作为电子负载的便携式光伏电池测试仪,该测试仪用FPGA生成采样模块,采样频率更快,并采用变频采样的方法,解决了传统电容式测试仪I-V曲线数据过度密集在开路电压附近的小部分区域,而曲线主体部分较稀疏的问题。滤波后的曲线更加平滑,得到的Im、Vm、Pm、FF等相关参数更加精确,可重复性更好。This paper designed a portable testing system for PV array based on FPGA.Compared with the traditional portable testing systems with capacitors as the electronic load,the testing system with a sampling module based on FPGA has a much higher sampling rate,and employs rate-variable sampling,which has solved the problem that the data acquired by traditional capacitive testing systems are over-concentrated in a small area near open-circuit voltage in the I-V curve,while the quantity of data in the main part of the curve is far from enough.This makes the system capable to provide a more smooth I-V curve and a better accuracy and repeatability of the related parameters,such as Im,Vm,Pm,FF.

关 键 词：光伏方阵 测试仪 变频采样 数据冗余 

分 类 号：TM615[电气工程—电力系统及自动化]