电测与仪表2017，Vol.54Issue(22)：65-70,6.
基于频域辨识的合并单元额定延时测量技术
Rate delay time meas uring t echnologyo f merging unit based on frequency domain identific ation
庞福滨 1刘玙 1嵇建飞 1袁宇波 1卜强生1
作者信息
- 1. 国网江苏省电力公司电力科学研究院,南京211103
- 折叠
摘要
Abstract
There is rated delay time in data sampling and outputting process of merging unit(MU)in smart substa-tion,which directly relates with the time of relay protection.Currently,there is shortage in rated delay time measuring and threatens the normal system operation.In this paper,the group and transfer delay time are analyzed in the sam-pling,processing link of MU starting from sampling link.The research results show that the group delay time in time domain corresponds to linear phase characteristics in frequency domain.On this basis,the rated delay time measuring method based on frequency domain identification is proposed by inputting different frequency signals and obtaining phase frequency characteristics of MU.Meanwhile,the influences of MU phase error on the measuring of rated delay time are analyzed.Finally,the feasibility and validity of rated delay time method are verified by theoretical simulation and experiment measurement.The method in this paper provides a feasible way to measure delay time in digital sam-pling engineering application,and ensures the validity and reliability of relay protection.关键词
频域辨识/合并单元/额定延时/群延迟Key words
frequency domain identification/merging unit(MU)/rated delay time/group delay time分类
信息技术与安全科学引用本文复制引用
庞福滨,刘玙,嵇建飞,袁宇波,卜强生..基于频域辨识的合并单元额定延时测量技术[J].电测与仪表,2017,54(22):65-70,6.
