基于ARM9微处理器的电流互感器变比特性测试的研究.pdf

总第330期 计算机与数字工程 Vol . 45 No . 4 2017年第4期 Computer / Digital Engineering 745 基 于 A R M 9 微处理器的电流互感器 变比特性测试的研究 吕方兴1 2 陈守满1 方 昕 1 (1.安康学院电子与信息工程学院安康725000)!.西安交通大学电气学院西安710049) 摘 要 电流互感器(CT)变比特性是CT性能的重要体现,而测量CT变比特性是判断其性能的重要方法。针对现场 使用电流法测量电流互感器变比特性较难等问题，研究了一种以基于ARM920T 内核的32位嵌人式微处理器S3C2410为 核心的电压比测量电流互感器变比特性的测试方法。其测试系统主要由中央处理器模块、二次侧电压和一次侧电压信号调 理模块、数据采集模块等组成，从而提高测量的可靠性和稳定性。通过对不同变比的电流互感器进行测试，电流互感器变比 特性的准确度可达到0. 87%。试验结果表明,该测试方法简单可行，测试电源容量低、稳定性高 。 关 键 词 电流互感器；变比 ARM9; S3C2410;测试 中图分类号 TM452; TP274 DO # 10. 3969/j . issn 1672-9722. 2017. 04. 032 Transformation Ratio Test of Current Transformer Based on ARM9 Microprocessor LVFangxing1’2 CHEN Shouman1 FANG Xin1 (1. Dept, of Electronic and Information Engineering, Ankang University , Ankang 725000) (2. Department of Electrical Engineering , Xi，an Jiaotong University , Xi，an 710049) Abstract Transformation ratio of current transformer is an important manifestation of CT performance , and measuring CT transformation ratio is an important method to judge its performance. In order to solve the problem that the large current source is difficult to obtain in measuring the ratio of current transformer by current ratio , a test method based on ARM9，s 32- bit embeds micro processing S3C2410 as the core processor to measure the current transformer ratio is studied. This system is mainly composed of a central processor module , secondary voltage and primary voltage signal conditioning module , data acquisition module , in order to imprvve the reliability and stability of transformer ratio of different ratio test , the accuracy ca