The Open Electrical & Electronic Engineering Journal

2014, 8 : 445-452
Published online 2014 December 31. DOI: 10.2174/1874129001408010445
Publisher ID: TOEEJ-8-445

Applying Energy-Equal Entropy of Wavelet Packet to Diagnose Circuit Breaker Faults

Liu Mingliang , Wang Keqi , Sun Laijun and Zhang Jianfeng
College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, China, 150040.

ABSTRACT

Aiming to better reflect features of machinery vibration signals of high-voltage (HV) circuit breaker (CB), a new method is proposed on the basis of energy-equal entropy of wavelet packet(WP). First of all, three-layer wavelet packet decomposes vibration signal, reconstructing 8 nodes of signals in the 3rd layer. Then, the vector is extracted with energy-equal entropy of reconstructed signals. At last, the simple back-propagation (BP) neural network for fault diagnosis contributes to classification of the characteristic parameter. This technology is the basis of a number of patents and patents pending, which is experimentally demonstrated by the significant improvement of diagnose faults.

Keywords:

Characteristic entropy, energy-equal, fault diagnosis, wavelet packet.