【摘要】:本文首先介绍了国内外电力系统谐波测量装置的现状，分析了数字信号处理芯片在电力系统中的应用情况。然后，介绍了谐波的基本概念、衡量指标和数学分析方法。最后针对电力部门和实际应用的需要，提出了以Intel80c196kc作为主控制器，数字信号处理芯片TMS320C32作为从CPU的主从式硬件系统设计构想。 论文完成了基本的硬件电路设计和软件算法设计。 硬件设计方面，根据电力系统中数据采集和处理的实际特点，设计了信号的多通道采样保持和时分转换电路，实现了多路信号的同步采样和快速转换。主从CPU之间采用双端口RAM进行数据交换，充分发挥了微控制器的控制功能和DSP芯片的数字信号处理优势。 软件算法方面，系统采用传统的快速傅立叶变换(FFT)，对采集的电压和电流信号进行频谱分析。论文中还详细分析了信号的采样问题，以及信号的数字滤波问题。初步设计了对采集数据进行计算和处理的相关软件算法，实现了对谐波的测量功能。 本装置可以快速，准确的进行谐波的测量和分析。
【关键词】:DSP(数字信号处理器)，谐波，同步采样，数字滤波
Development of a Device for Measuring Harmonic in Electric Power System Based on DSP
【Abstract】:By analyzing the situations of the electric harmonic monitoring equipments home and abrod,aiming at the demand of power department and the practical applications.The application of Digital Signal Processor in the electric power systems is introduced in this paper. The paper briefly analyzes concepts of harmonic and methods of computing harmonic，and then proposes the hardware and software structure which uses industrial level microcotroller Intel 80c196kc as master CPU，TMS320C32 as the slave CPU，and can perform measurement and processing.
The instrument used to implement techniques is an advanced data acquisition and parallel processing system aimed specifically at continuous real-time power system signal monitoring .A high speed and high precision distributed data acquisition and processing system is designed based on DSP. The synchronous data sampling of supervising system is realized by multi-channel collection retaining and A/D transformation circuit.
The concepts of fiitering and smpling power system voltage and current signals for harmonic analysis using the fast Fourier transform( FFT) algorithm by a digital signal processor are introduced.According to the special characters of the electric power system，the algorithm of DSP is presented.
The equipment can provide comprehensive and accurate recording data for harmonic analysis.
【Keywords】:DSP(Digital Signal Processor)，Harmonic，Synchronous sampling，Filtering
