浙江电力2023，Vol.42Issue(12)：28-35,8.DOI:10.19585/j.zjdl.202312004
基于改进EWT的低频快速断路器振动特性分析
Vibration characteristic analysis of low-frequency fast circuit breakers based on im-proved EWT
摘要
Abstract
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 evalu-ating 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 charac-teristics 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
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Key words
flexible low-frequency AC transmission/low-frequency fast circuit breaker/vibration signal/empirical wavelet transform/Hilbert energy spectrum引用本文复制引用
张淼彬,王劭鹤,王丰华,陈孝信,赵琳..基于改进EWT的低频快速断路器振动特性分析[J].浙江电力,2023,42(12):28-35,8.基金项目
国网浙江省电力有限公司科技项目(5211DS220007) （5211DS220007）
