Simulation modelling and feature extraction to voltage compound disturbances by modified generalised S-transform

Abstract

Voltage sag disturbances are the most important type of disturbance in power quality analysis and the extraction to voltage compound disturbances is more difficult. Here, four composite voltage sag disturbance models are constructed and the feature extraction method by modified generalised S-transform (GST) is given. By optimising the introduced r-parameters, it can obtain better time resolution and frequency resolution by the modified GST. Results of simulation experiments and the application in a steel plant main line show that both time domain disturbance and frequency domain disturbance information can be extracted with higher resolution.

Keywords

• feature extraction
• power supply quality
• transforms
• power system faults
• time-frequency analysis
• steel plant main line
• time domain disturbance information
• composite voltage sag disturbance models
• power quality analysis
• frequency domain disturbance information
• modified gst
• modified generalised s-transform
• feature extraction method