SDH-based time synchronous system for power system communications

被引:8
|
作者
Serizawa, Y [1 ]
Kitamura, K
Myoujin, M
Shimizu, K
Matsushima, T
Morimitsu, M
机构
[1] Cent Res Inst Elect Power Ind, Tokyo 201, Japan
[2] NEC Corp Ltd, Minato Ku, Tokyo 108, Japan
关键词
time dissemination; synchronization; phase synchronization; clocks; synchronous digital hierarchy; global positioning system; power system protection; power system control;
D O I
10.1109/61.660850
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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 time synchronizing equipment is attached to existing SDH 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.
引用
收藏
页码:59 / 65
页数:7
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