薄膜与小组件太阳电池特性参数测试系统的研制  

Test system for photoelectric characteristic parameters of thin film and module solar cells

作　　者：王志明[1] 龚振邦[1] 魏光普[1] 

机构地区：[1]上海大学机械电子工程与自动化学院,上海200072

出　　处：《光学精密工程》2011年第3期628-634,共7页Optics and Precision Engineering

基　　金：上海市重大科技攻关资助项目(No.03DZ12033)

摘　　要：为了快速、精确地测量薄膜与小组件太阳电池的光电特性参数,建立了太阳电池测试系统,研究了测试系统的控制模式与测试精度。选取DSP芯片TMS320LF2407为主控芯片,采用模块化与总线结构的设计思路,使系统具有较快的响应性与扩展性。运用高精度运算放大器等电子元件,研制了程控电子负载,可精确测量太阳电池的短路电流与开路电压。采用多路电子开关、多路继电器与精密电阻组合设计,实现了太阳电池光电参数的分挡测试,使系统可适用于多规格、多品种薄膜与小组件太阳电池的特性参数测量。实验结果表明:系统能在短路电流3 mA^5.6 A,开路电压0.5~20V内实现自动分档测试,开路电压的最大相对误差<0.4%,短路电流的最大相对误差<0.8%,很好地满足了薄膜与小组件太阳电池精确测量的需要。A test system was established to test the photoelectric characteristic parameters of thin film and module solar cells rapidly and accurately, and the control mode and test accuracy of the test system were studied. By taking the DSP chip TMS320LF2407 as the main chip, the modular and bus structures as the design idea, the obtained system show a faster response and a good scalability. With the applications of high precision operational amplifiers and other electronic components, a programcontrolled electronic load was developed, so that the short circuit currents and open-circuit voltages of the solar cells can be measured accurately. Furthermore,the multi-channel electronic switches, relays and precision resistors were combined to realize an adaptive test, and the photoelectric characteristic parameters of different thin film and module solar cells were measured accurately. The experiment results show that the test system can complete the adaptive test while the short-circuit current is in the range of 3 mA to 5.6 A and the open-circuit voltage is from 0 V to 50 V. The relative error is less than 0.65 for the measurement of open-circuit voltage and 0.8% for the measurement of short-circuit current, respectively. This result satisfies the demands of solar cell test.

关 键 词：薄膜太阳电池 小组件太阳电池 开路电压 短路电流 

分 类 号：TM914.42[电气工程—电力电子与电力传动]