文档介绍：基于DSP 的供电系统电力参数检测的研究
摘要
电力参数的准确、快速测量对于实现电网调度自动化、保证电网安全与经济运行具有十分重要的意义。本文通过分析国内外电力参数监测装置的发展状况,针对我国电力部门的要求和实际问题,在建立基于FFT算法的电力参数测量模型的基础上,研制出一种新型多功能电力监测仪。
本设计硬件采用TI公司的TMS320C5402作为核心处理器,根据电力系统中数据采集和处理的实际特点,用DSP控制可对6路进行同时采样的高速A/D转换器AD73360来完成6路信号的数据采集,满足电力系统中数据采集的实时性与同步性;并用CPLD与凌阳单片机实现部分控制功能,即键盘部分、LCD接口、语音部分以及串口通讯等电路。
在软件方面进行了相关软件算法设计,系统采用128点离散采样,由DSP进行基-2FFT运算。在FFT算法之前设置了FIR数字滤波环节,有效的减小干扰,提高了测量的精度。同时介绍了电力参数检测的主程序,并实现了语音提示功能和更加人性化的操作显示界面。
本设计将高速DSP芯片与精确的傅立叶变化运算这两种先进的软硬件技术结合起来,设计了基于DSP电力参数测量系统,提高了测量精度,保证了实时性。实现三相电网3路电压、3路电流信号的同步采集,被测电网信号电力参数的实时测量;键盘选择各路电网信号、被测参数,并对测量结果进行液晶显示;系统出现故障时实现语言报警等功能。
关键词:电力参数;FFT;TMS320C5402;CPLD;锁相同步
ABSTRACT
The exact and quick detection of electric power parameters plays a key role in the realization of the automation regulating of the electric work, of the safe of electric power, and of the economical operation of the whole power system. Through the analysis of domestic and international developmental status quo of the monitoring device for electric power parameters detection, and aiming at the requirements and the practical issues in electricity sector of our country, and on the basis of setting up FFT algorithm based model of electrical power parameters detection, the paper proposes a new type of multi-purpose electric power monitor device.
The hardware design uses TI's TMS320C5402 as the core processor. According to data of the power system collection and processing in the practice, by using dsp, the system plete the six channels Signal Converter through high speed AC converter AD73360; meet the power system data acquisition in real-time and synchronization. CPLD and Sunplus MCU implement partial control function, including keyboard, LCD interface, and the voice and munications circuit.
To software the concerning software algorithms is designed. The system adopts 128 points sample and DSP to be responsible for 2-based FFT operation. Before the use of FFT algorithm, FIR digital filter sector is used to effectively reduce interfere