Development of a wavelet-based algorithm to detect and determine ...

2.5.2 Software modules . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 SIMEAS R in the laboratory 14
3.1 SIMEAS R configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Laboratory use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 IEEE Standard Common Format for Transient Data Exchange (COMTRADE)
for Power Systems 18
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2 Sources of transient data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3 Files for data exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.1 Header file (xxx...xxx.HDR) . . . . . . . . . . . . . . . . . . . . . . 20
4.3.2 Configuration file (xxx...xxx.CFG) . . . . . . . . . . . . . . . . . . 21
4.3.3 Data file (xxx...xxx.DAT) . . . . . . . . . . . . . . . . . . . . . . . . 26
4.4 Differences between the 1991’s and the 1999’s standard . . . . . . . . . . 26
5 Program to read Comtrade files into Matlab 28
5.1 Data structure of data storage in MATLAB . . . . . . . . . . . . . . . . . 31
6 Wavelets 33
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.2 Basic ideas of the wavelet transform . . . . . . . . . . . . . . . . . . . . . 35
6.2.1 Representation of signals through transforms . . . . . . . . . . . . 35
6.2.2 Continuous Wavelet Transform . . . . . . . . . . . . . . . . . . . . 43
6.2.3 Discretization of Continuous Wavelet Transform . . . . . . . . . . 49
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