电子式电流互感器数据采集系统的研究

作者：陈继煌，陈明军* 日期：2010-09-08/span> 浏览：3928 查看PDF文档

电子式电流互感器数据采集系统的研究

陈继煌，陈明军*

（浙江工业大学 信息工程学院，浙江 杭州 310014）

摘要：为了更好地适应电力计量系统数字化发展的趋势，设计了一种新型的电子式电流互感器数据采集系统。采用高速数字信号处理器（DSP）TMS320F2812芯片，外接14位的AD7894和信号调理电路，为了更好、更快地进行信号传送，DSP和AD7894之间采用光纤传输。给出了A/D控制程序流程图、仿真波形，并分析了测试结果。该系统具有强大功能的芯片和效率更高的软件使系统增强了数据采集和数据传输的速度和精度。该数据采集系统具有低功耗、高性能及良好的电隔离性。试验结果表明，测量精度符合IEC0.2级标准。
关键词：电子式电流互感器；数据采集；数字信号处理器；TMS320F2812；AD7894
中图分类号：TH86
文献标识码：A文章编号：001-4551(2010)08-0081-04

Research for data acquisition system of electronic current transformer
CHEN Jihuang, CHEN Mingjun
(College of Information Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: Aiming at adapting the digital technological development trends of power measurement system better, a design of data acquisition system of new electronic current transformer was introduced. Using the highspeed digital signal processor(DSP) TMS320F2812, external connected with AD7894, signal conditioning circuit，optical transmission was used between DSP and AD7894 in order to transmit signal better and faster.The flowchart and simulation waveforms of A/D conctrol programs were given and the results were analyzed. The functional chips and more efficient software improve the speed and accuracy of data acquisition and transmission in the system. This system features with low power consumption, excellent performance and good electric isolation.The test results indicate that the precision of this systerm can meet the IEC0.2 standards.
Key words: electronic current transformer; data acquisition; digital signal processor(DSP); TMS320F2812; AD7894