张淼彬,王劭鹤,王丰华,陈孝信,赵琳
ZHANG Miaobin,WANG Shaohe,WANG Fenghua,CHEN Xiaoxin,ZHAO Lin

• 1:上海交通大学电气工程系
• 2:国网浙江省电力有限公司电力科学研究院

摘要(Abstract)：

LFFCB（低频快速断路器）分合产生的剧烈振动可能影响其机械性能，但当前缺乏对其振动影响的评估手段，需提出表征LFFCB机械性能的振动特性测试与分析方法，提升其运行可靠性。为此，开展了LFFCB分合闸过程中的振动信号测试，基于改进EWT（经验小波变换）与Hilbert变换分析了振动信号的时频特征。结果表明，经改进频谱划分的EWT能更加准确地获取LFFCB分合闸过程中振动信号的多个模态分量，分合闸过程中振动信号不同位置处能量谱的分布特征存在明显差异。
The violent vibrations generated during switching of low-frequency fast circuit breakers(LFFCBs) can potentially impact their mechanical performance. However, there is currently a lack of assessment methods for evaluating the effects of these vibrations. It is necessary to introduce an approach for vibration characteristic testing and analysis that characterizes the mechanical performance of LFFCBs to improve their operational reliability. To this end, the vibration signal test of LFFCBs during the switching process is carried out, and the time-frequency characteristics of the vibration signal are analyzed based on the improved empirical wavelet transform(EWT) and Hilbert transform. The findings indicate that the EWT with spectrum partitioning being improved can more accurately obtain multiple modal components of the vibration signal during the LFFCB switching. Furthermore, there are significant differences in the distribution characteristics of the energy spectrum at different locations of the vibration signal.

关键词(KeyWords)： 柔性低频交流输电;低频快速断路器;振动信号;经验小波变换;Hilbert能量谱
flexible low-frequency AC transmission;low-frequency fast circuit breaker;vibration signal;empirical wavelet transform;Hilbert energy spectrum

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司科技项目（5211DS220007）

作者(Author): 张淼彬,王劭鹤,王丰华,陈孝信,赵琳
ZHANG Miaobin,WANG Shaohe,WANG Fenghua,CHEN Xiaoxin,ZHAO Lin

DOI: 10.19585/j.zjdl.202312004

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