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Comparison of permutation entropy values for L 3 min waveforms of both turbine 3 and 14.  

Comparison of permutation entropy values for L 3 min waveforms of both turbine 3 and 14.  

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This article presents the applicability of Permutation Entropy based complexity measure of a time series for detection of fault in wind turbines. A set of electrical data from one faulty and one healthy wind turbine were analysed using traditional FastFourier analysis in addition to Permutation Entropy analysis to compare the complexity index of ph...

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Context 1
... most of the current waveforms of both turbines the permutation entropy values are comparable. But, there exists some waveforms for which the permutation entropy value does not match and the waveforms for one turbine has a comparatively higher permutation entropy value with respect to the corresponding waveforms of the other turbine. Fig. 2 and Fig. 3 illustrates the above statement taking into account the permutation entropy values of both turbines T 14 and T 3 for L 1 and L 3 waveforms. It can be seen that for the same waveforms (L 1 ) of both turbines T 14 and T 3 , the permutation entropy value can be comparable, meaning, they have almost same average and standard deviation ...
Context 2
... turbines T 14 and T 3 for L 1 and L 3 waveforms. It can be seen that for the same waveforms (L 1 ) of both turbines T 14 and T 3 , the permutation entropy value can be comparable, meaning, they have almost same average and standard deviation through out the time frame. Where as the permutation entropy value for L 3 waveforms of both turbines in fig. 3 has different values for each turbine and are not comparable with each other. Fig. 4 shows the difference of permutation entropy values for both L 1 and L 3 waveforms from both the turbines. It is clear from the figure that the difference of permutation entropy values for the L 1 waveforms has comparatively lower value than L 3 ...

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