Power Quality Disturbances Detection Based on Hilbert Phase-Shifting

This paper analyses the principle of work of using phase-shifting method to detect power quality (PQ) disturbances based on Hilbert transform (HT). This method is proposed by using phase-shifting for real-time detection on various PQ disturbances, such as voltage swells, voltage sags, voltage fluctuation, harmonics and transient oscillation. Based on the detection platform of LabVIEW environment, the simulation results show that the method can satisfy various PQ disturbances signal detection, and also has a good real-time system characteristics and accuracy.