Abstract:

More  generators and EHV(Extra High Voltage) transmission systems are put into operation in power systems which leads to many new situations, such as the lengthening transmission distance,the heavier load,the increasing transient elements during the transient process.Based on the analysis of power system faults, the singularity detection theory based on wavelet analysis is applied to the power system faults detection, and a new fault detection is given. The simulation proves that it is a quick,correct and effective fault detection method, and its detection time less 0.4 ms.

Key words: wavelet analysis, power system faults, singularity detection