Sampling rate conversion and data synchronization in big merging unit

Author

Tao, Rukui ; Jiang, Baochen ; Wang, Chengyou

Author_Institution

Sch. of Mech., Electr. & Inf. Eng., Shandong Univ. at Weihai, Weihai, China

fYear

2011

fDate

6-9 July 2011

Firstpage

531

Lastpage

534

Abstract

In order to achieve multirate sampling conversion and Data Synchronization (DS) for multi-channel data from Electronic Instrument Transformers (EITs) in power system when the sampled data are outputted to IEDs, Big MU scheme has been proposed. Big MU consists of modules of MUs, multirate conversion and DS. Sampling data of MUs from EITs get through multirate conversion module including interpolation, low-pass FIR filter and decimation to obtain the desired sequence values. However, the multi-channel data after conversion are asynchronous with a unified frequency; DS module is utilized for syncing the asynchronous data. The experimental result shows that the scheme can achieve sampling rate conversion and satisfy the requirement of each harmonic component´s amplitude precision in the IEDs by using module of DS in Big MU.

Keywords

data communication; instrument transformers; interpolation; low-pass filters; relay protection; signal sampling; substation automation; substation protection; synchronisation; asynchronous data; big MU; data synchronization; electronic instrument transformer; interpolation; low-pass FIR filter; multichannel data; multirate sampling conversion; power system; Band pass filters; Finite impulse response filter; Frequency conversion; Interpolation; Low pass filters; Synchronization; FIR filter; MU; data synchronization; decimation; interpolation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2011 4th International Conference on

Conference_Location

Weihai, Shandong

Print_ISBN

978-1-4577-0364-5

Type

conf

DOI

10.1109/DRPT.2011.5993949

Filename

5993949