基于冲击放电试验的电力电容器外壳振动预估方法

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摘要高压直流换流站中电容器装置辐射噪声水平高，需要对其进行振动和噪声的预估。本文关注电容器外壳振动的预估，基于机电联合频响函数系统地提出了一种新型的电容器外壳振动预估方法。机电联合频响函数定义为电容器外壳振动速度与电容器激励电压平方的频域比，可以由冲击放电试验获取。在给定的激励条件下，电容器外壳的振动速度等于机电联合频响函数与激励电压平方的频域乘积。本文比较了两种相同激励条件下电容器外壳振动预估结果与实测结果，说明了本文所提的电容器外壳振动预估方法可行准确。

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	祝令瑜
	汲胜昌
	沈琪
	刘源
	刘浩

关键词 ：电力电容器, 冲击放电试验, 振动预估, 频响函数

Abstract：Capacitor stacks radiate a lot of noise in HVDC converter stations,and the noise level and the vibration should be predicted. The prediction method of capacitor tank vibration is concerned in this paper. A novel prediction method of capacitor tank vibration is proposed methodically based on a frequency response function. The frequency response function,which is the frequency domain quotient of vibration velocity of capacitor tank and the squared capacitor voltage,is defined as the electro-mechanical frequency response function and can be obtained by impulse discharge test. Under given excitation,the vibration velocity can be calculated by the product of electro-mechanical frequency response function and the squared voltage in frequency domain. The comparison of predicted and measured vibration of capacitor tank under two excitations is conducted to verify the effectiveness of the prediction method presented in this paper.

Key words： Power capacitor impulse discharge test vibration prediction frequency response funciton

收稿日期: 2013-04-15 出版日期: 2015-01-22

PACS:

TM532.1

基金资助:国家自然科学基金(50907046，51377130)及高等学校博士学科点专项科研基金(201202011100055) 资助项目。

作者简介: 祝令瑜男，1988年生，博士研究生，研究方向为电力电容器噪声与振动，电力设备状态监测，电力系统电磁环境。汲胜昌男，1976年生，教授，博士生导师，研究方向为电力设备的在线监测及故障诊断，电力设备电磁场计算及其绝缘结构优化，电力系统中电磁环境，电力设备振动噪声特性。

引用本文:

祝令瑜，汲胜昌，沈琪，刘源，刘浩. 基于冲击放电试验的电力电容器外壳振动预估方法[J]. 电工技术学报, 2014, 29(11): 239-246. Zhu Lingyu,Ji Shengchang,Shen Qi,Liu Yuan,Liu Hao. Vibration Prediction Method for Power Capacitors Based on the Impulse Discharge Test. Transactions of China Electrotechnical Society, 2014, 29(11): 239-246.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I11/239

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