基于DSP的便携式三相多功能伏安相位仪的研制

【作者】 景芳；

【导师】 刘慧英；

【作者基本信息】 西北工业大学 ， 控制理论与控制工程， 2006， 硕士

【摘要】 本文论述了基于DSP的三相多功能伏安相位仪的研制。目前,人们对电力系统的实时性、运算精度和大数据量运算等要求不断提高,普通单片机系统在很多场合己不能很好地满足要求。DSP系统由于具有运算速度快、精度高等优点,正逐渐取代单片机系统,成为一大技术热点。本文首先介绍了DSP的发展和应用,接着讲述DSP芯片区别于普通微处理器的一些特征,具体介绍DSP芯片的结构、典型DSP系统的构成及其软硬件设计方法等。 针对电力系统设备的特点,综合考虑各种因素,采用TI公司的TNS320LF2407A DSP为核心处理器,采用多通道12位AD7859AP进行数据采集转换,可通过液晶显示测量结果,并可打印测量报告,设计开发了一个基于DSP的电力电量参数测量系统。该测量系统,它集三相电压表、三项电流表、相位表、相序表、频率计、功率表、功率因数表、频谱分析仪八大功能于一身,这给现场的操作员带来很大的方便。该仪器体积小、功能强、精度高,可以广泛适用于电力系统及相关行业继电保护和计量专业、工矿企业、石油化工、冶金企业的二次回路检查。更多还原

【Abstract】 In this thesis, the development of a portable three-phase multifunctional volt-ampere phase meter based on DSP is discussed. Presently, in electrical systems the requirement of real-time performance, high processing precision and huge amount of data to be processed is increasing highlier than before. SCM (Single Chip Microcomputer) system is hard to meet the demands above while DSP system causes more and more attentions because of its high computing speed and powerful data precessing ability. DSP system is now replacing the SCM system in many fields. In this paper, the application of DSP chip is introduced first. Then the difference between DSP chip and a common micro-processor is described. Finally a DSP system designed and developed is introduced in detail.This DSP system is used as a three-phase multifunctional volt-ampere phase meter. The DSP chip TMS320LF2407A is using as the core processor. A multi-channel 12 bit A/D converter AD7859 performs data acquisition. All parameters measured can be displayed in a LCD and printed out. This system is functioned as a three-phase voltage-meter, a three-phase ampere-meter, a phase-meter, a phase sequence meter, a frequency-meter, a power-meter, a power-factor-meter and a spectrum meter. It is very convenient for the field operators and can be used as a secondary meter in mining industry, the petroleum chemical industry, the metallurgical industry.更多还原