Power quality disturbance detection and identification based on dq conversion and wavelet transform
Zhang Xiu · 2005
A method combining d q conversion and wavelet transform to detect and identify power quality disturbances is proposed,which makes use of the characteristics of d q conversion’s virtual value and the sensitivity of wavelet transform to sudden,change singals. It can identify ten kinds of power quality disturbances with high correctness ratio,such as voltage sag and rise,and calculate the eigenvalues of each disturbance. Some concurrent disturbances are discussed and simulated and the results show that the detection and identification are effective.