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This paper analyzed the problems existed in practice teaching process of electric courses and put forward a new view which is to apply virtual instrument (VI) technology in theses courses. On the basis of a simple instruction for labVIEW's VI design function, an instance which designed by labVIEW to emulate and detect harmonic signals was described in detail. The instance has been used in the course...
Aiming at the non-stationary ,burst characteristic of the transient disturbance in power system, the paper introduce a method using the db4 lifting wavelet transform to detect and locate the power quality transient signal, through analyzing the characteristic that the lifting wavelet is fit for detecting the signal catastrophe point of transient disturbance. Using this method to detect and locate...
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,...
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