SDH-based time synchronous system for power system communications

Author

Serizawa, Y. ; Kitamura, K. ; Myoujin, M. ; Shimizu, K. ; Matsushima, Takaaki ; Morimitsu, M.

Author_Institution

Central Res. Inst. of Electr. Power Ind., Tokyo, Japan

Volume

13

Issue

1

fYear

1998

fDate

1/1/1998 12:00:00 AM

Firstpage

59

Lastpage

65

Abstract

As precise time information is particularly useful for power system communications, a time transfer system using terrestrial fiber optic digital networks, or SDH (synchronous digital hierarchy)-based time synchronous networks, is proposed in addition to radio- or satellite-based time dissemination systems such as GPS (Global Positioning System). In the system, auxiliary synchronizing equipment is attached to existing networks composed of SDH transmission equipment and digital clock supplies, and not only frequency but also frame phase or time is synchronized. Experimental time synchronizing devices showed potentially satisfactory performance; synchronization errors between two devices were of the order of sub-microseconds

Keywords

Global Positioning System; optical fibre networks; power systems; synchronisation; synchronous digital hierarchy; telecommunication networks; GPS; Global Positioning System; SDH transmission equipment; SDH-based time synchronous system; digital clock supplies; performance; power system communications; precise time information; synchronous digital hierarchy; terrestrial fiber optic digital networks; time transfer system; Control systems; Frequency synchronization; Global Positioning System; Power system control; Power system protection; Power system relaying; Power system reliability; Power systems; Synchronous digital hierarchy; Timing;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.660850

Filename

660850