In addition a digital signalgenerator was incorporated via a DDS chip AD9850 from Analog Devices inc, featuring accurate frequency preset, quick phase transformation and low phase noise.
The traditional PSS use the local signal such as the generator electromagnetism power or shaft speed as its input to restrain lowfrequency oscillation.
传统的PSS使用本地可测量的发电机电磁功率、转速等作为输入信号以抑制低频振荡。
3
The realization of the project is mainly composed of two parts. The first part is lowfrequencysignalgenerator based on DDS, and the second part is high frequency signal synthesizer.