中小功率光伏阵列I-V特性测试技术研究

Study on Testing Technology of Small and Medium Wattage Solar Array I-V Characteristic

这里采用一种基于动态电容充电方法,结合高速A/D采样和数据处理,实现对光伏阵列的现场I-V特性测试。该方法具有安全性高、体积小、成本低、精度高等特点,并可用于更大功率的光伏阵列现场测试。详细介绍了系统的结构原理和测试方法,并进行了样机研制和现场测试,实验结果表明该方法满足工程应用需求。

This paper takes advantages of the measurement of solar array that samples the signal of voltage and cur- rent continually during capacitor charging by solar array, combined with high-speed A/D sampling and data process- ing.This method can test I-V characteristic of solar array safely and high precision with low cost and small size.Further more, this method can be used in high-power solar array.This paper details architecture principles of this system and testing methods, and a solar array tester for practice is developing successfuUy.The experimental results show that the method meet the engineering requirements.