Calculation Method of Noise Level for Capacitor Based on Vibration Signal
Cao Tao1, Ji Shengchang1, Wu Peng1, Zhang Jin1, Li Yanming1, Li Xiaolin2, Li Yan2
1. State Key Laboratory of Electrical Insulation for Power Equipment Xi’an Jiaotong University Xi’an 710049 China2. CSG Technology Research Center Guangzhou 510623 China
Abstract：The noise of capacitor installation is one of main noise sources at converter station, so it has important significance to study noise level calculation method of a single capacitor for reasonable evaluating the noise level of the whole capacitor installation. First, the generation mechanism of capacitor noise is described in the article, the electric field force between electrodes leads to the vibration of capacitor tank and then the noise is produced and radiated out. Then the relationship between the vibration of capacitor surface and its radiation noise is analyzed, and its calculation formulas are also presented. The vibration and noise measuring system is established in the laboratory, acceleration signal in different conditions of the capacitor surface is measured, and then the data is verified by spectrum analysis. Finally, the A weighting sound pressure level (LPA) is calculated by the formulas in the article, the comparison and analysis between calculation and measurement in hemi-anechoic room validate the presented method.
曹涛, 汲胜昌, 吴鹏, 张晋, 李彦明, 黎小林, 李岩. 基于振动信号的电容器噪声水平计算方法[J]. 电工技术学报, 2010, 25(6): 172-177.
Cao Tao, Ji Shengchang, Wu Peng, Zhang Jin, Li Yanming, Li Xiaolin, Li Yan. Calculation Method of Noise Level for Capacitor Based on Vibration Signal. Transactions of China Electrotechnical Society, 2010, 25(6): 172-177.
2010, Vol. 25 
