Fault Diagnosis of On-load Tap-changer Based on Vibration Signal

5th International Symposium on Hydrogen Energy, Renewable Energy and Materials

能源学;材料科学

Huang, Wenquan^1 ; Peng, Changqing^1 ; Jin, Liang^1 ; Liu, Jiacheng^1 ; Cai, Yuqi^1

Huaqiao University, Xiamen

361021, China^1

关键词: Load transformers;    On-load tap changers;    Reactive power flow;    State characteristics;    State diagnosis;    State information;    Vibration signal;    Wavelet packet transforms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/605/1/012005/pdf
DOI  :  10.1088/1757-899X/605/1/012005

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

On-load tap-changer (OLTC) is an important part of large-scale load transformers, and its fault will directly affect the reactive power flow regulation of the power system and the stability of the load center voltage. In this paper, a fault state diagnosis method based on vibration signal is proposed for fault diagnosis of tap changer. The vibration signals are decomposed by wavelet packet transform and calculated energy entropy to obtain the state information of the tap changer. The experimental data shows that the state characteristics are obvious under different faults, which lays a foundation for in-depth study of fault diagnosis.