Measured time delay and re-synchronization time in digital microwave radio systems

Author

Allen, E.W.

Author_Institution

Alcatel Network Syst., Richardson, TX, USA

Volume

9

Issue

2

fYear

1994

fDate

4/1/1994 12:00:00 AM

Firstpage

639

Lastpage

644

Abstract

The transition from analog to digital transmission systems has been slower for electric power utilities than other industrial sectors because of concern that digital transmission system delay times could adversely impact the response time of transfer trip protective relaying equipment. Alcatel Network Systems has completed a comprehensive testing program to measure the absolute time delay and various re-synchronization times through analog and digital transmission systems. The general conclusion is that the worst case absolute time delay of 577 microseconds, VF to VF, through the digital microwave system is approximately one half the delay for a typical analog system. Absolute time delays of 500-600 microseconds should cause no problems to transfer trip protective relaying systems

Keywords

delays; digital radio systems; electricity supply industry; power system computer control; power system protection; relay protection; synchronisation; telecontrol; 500 to 600 mus; 577 mus; Alcatel Network Systems; absolute time delay; delay times; digital microwave radio systems; electric power utilities; re-synchronization times; response time; testing; transfer trip protective relaying equipment; Delay effects; Electrical equipment industry; Intelligent networks; Microwave measurements; Power industry; Power system protection; Protective relaying; Radio transmitters; System testing; Time measurement;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.296239

Filename

296239