基于Nios II和DDS的谐波源设计

Based on the requirement of power quality study, the article is to develop high accuracy, low cost power quality signal generating device and provide them to the researchers for electrical power distribution system harmonic impedance test, to exam the quality improving ability of users’ facilities, to calibrate the electric power parameter detector set. FPGA.The core of the article is the FPGA development of technical signal generating device module that bases on DDS. Which discussed the principle of DDS and harmonic signal generator,and carried on the simulation analysis, selected the programming method to realize random harmonic signals superimposition as high as 21 times. Dual-port internal RAM is applied to improve the data storage of DDS in this paper.random power quality waveform output is realized.