New Criterion of Converter Transformer Differential Protection Based on Wavelet Energy Entropy

2019 ◽  
Vol 34 (3) ◽  
pp. 980-990 ◽  
Author(s):  
Yujia Deng ◽  
Sheng Lin ◽  
Ling Fu ◽  
Kai Liao ◽  
Lei Liu ◽  
...  
Keyword(s):  
Differential Protection ◽  
Wavelet Energy ◽  
Energy Entropy ◽  
Wavelet Energy Entropy ◽  
Transformer Differential Protection ◽  
New Criterion

Study on Sensor Signal Filtering Based on Wavelet Energy Entropy

2011 ◽  
Vol 63-64 ◽  
pp. 573-578
Author(s):  
Jian Guo Yan ◽  
Dong Li Yuan ◽  
Si Yuan Li ◽  
Xiao Jun Xing
Keyword(s):  
Maximum Entropy Principle ◽  
Noise Signal ◽  
Sensor Data ◽  
Sensor Signal ◽  
Signal Filtering ◽  
Wavelet Energy ◽  
Energy Entropy ◽  
Level Sensor ◽  
Wavelet Energy Entropy ◽  
Fuel Level

In order to increase the fuel level measurement accuracy in aircraft fuel system, the method of sensor signal filtering based on the wavelet energy entropy was put forward. Using the maximum entropy principle the wavelet energy entropy of high-frequency coefficient vector in each level was calculated while the output signal of sensor was analyzed in wavelet multi-resolution mode. Once the sum of wavelet energy entropy for filtered signal and noise signal is maximum, the filtering effect is much better. At the same time, the result of tests which use simulation signal and fuel level sensor data collected from fuel tank oscillation test are all satisfied, it is show that this method is available.

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