电力系统及其自动化学报2017，Vol.29Issue(11)：67-74,8.DOI:10.3969/j.issn.1003-8930.2017.11.011
断路器选相合闸关键参数的改进测量方法
Improved Measurement Method for Key Parameters of Phase Selection Technology of Circuit Breakers
摘要
Abstract
Phase selection is necessary for the instantaneous validation test of a molded case circuit breaker. To the mea?sure of the two key testing parameters of initial phase and frequency of periodic signal,an improved calculation method is proposed in this paper:First,the compound method of median filter and improved wavelet denoising are adopted to complete signal denoising. Then,with window-addition treatment,the spectrum leakage problem caused by Hilbert dig?italization is restrained. Finally,Hilbert computation is performed to obtain the initial phase and frequency of the sig?nal. Simulation shows that compared with the traditional fast Fourier transformation method,the use of Hilbert method can overcome the impact of frequency fluctuations on the measured result. Moreover,the improved method has high measurement accuracy even under typical noises. The phase selection experiment in situ further validated the practica?bility of this method.关键词
选相合闸/瞬动校验/Hilbert/中值滤波/小波去噪/窗函数Key words
phase selection/instantaneous validation/Hilbert/median filter/wavelet denoising/window function分类
信息技术与安全科学引用本文复制引用
孙曙光,庞毅,于晗,杜太行,王景芹..断路器选相合闸关键参数的改进测量方法[J].电力系统及其自动化学报,2017,29(11):67-74,8.基金项目
天津市科技支撑重点资助项目(12ZCZDGX014000) （12ZCZDGX014000）
河北省教育厅资助科研项目(ZD2016108) （ZD2016108）
河北工业大学博士科研启动费资助项目 （）
