| Abstract: | The contradiction of the relay protection with other task has been solved by double CPU's structure in this comprehensive monitor. Thus the speed of the data processing has raised and the requirement of relay protection and the real bine monitoring has all been satisfied. The input precision of the fault current and the rated current has been assured respectively by applying the relay protection CT and measurement CT. The algorithm of FFT with or without the difference has remarkably raised the precision of the protective measurement and removed the influence of the attenuation DC component in the fault current. Thus the accuracy and reliability of the protective trigger has been raised greatly. |
