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Characteristics Analysis of Power Quality Disturbance for Coal Mine Based on GST
Author(s): 
Pages: 11-17
Year: Issue:  9
Journal: Measurement & Control Technology

Keyword:  power quality disturbancegeneralized S-transformation(GST)characteristic analysiscoal mine;
Abstract: According to the present situation of the development of modernization coal mine,the causes and characteristics of the main four types of transient disturbance signals in coal mine are described.Combined with the superiorities of GST in analyzing the voltage amplitude,duration and frequency,the useful characteristics of time-frequency domain are extracted from module time-frequency matrixes(MTFMs).Four kinds of transient disturbance signals i.e.voltage sag,voltage rise,voltage fluctuation,and harmonic,are simulated by Matlab.The results of Matlab simulation show that this method can detect amplitude mutation,duration and frequency changes of the distarbance effectively,and has good ability of high frequency detection.These different characteristics can be used for further power quality disturbance recognition and comprehensive treatment.
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