The study and simulation verifying of the controlling signal detecting method about UPQC

This paper definitely proposes new direct-detecting methods for voltage or current that can be used in unified power quality conditioner. The calculation of the methods is simpler than other else, and so the detecting speed can be improved. This paper also lists a practical formula that calculates the amplitude of sine voltage instantaneously. At last, this paper gives the simulation results of the new method to prove its correctness.