750kV输变电示范工程中高频信号传输的测试和分析  

Measurement and Analysis on HF Signal Transmission in 750 kV Transmission and Distribution Demonstration Project

作　　者：马慧英 陈建军 张龙 

机构地区：[1]青海省海东供电局,青海省海东市810600 [2]西北电网公司西宁输变电工区,西宁市810008

出　　处：《电力建设》2006年第10期26-27,共2页Electric Power Construction

摘　　要：750 kV输变电示范工程中,在最高电压等级、最高海拔高度情况下,对输电线路高频信号传输的可靠性提出了更高的要求,它是线路正常工作的保证。在高频通道的设计上,为了保证安全可靠,采用2个相地结合设备的相间耦合方式,经测试,衰减和信噪比等各项技术指标满足通信和保护的要求。For the 750 kV transmission and distribution demonstration project, the higher requirements are given to the reliability of HF signals on the transmission line under the highest voltage grade and highest elevation above the sea level. The reliable transmission of signals is the guarantee for the normal operation of the line. In order to ensure safety and reliability the design of HF channels has adopted the phase - to - phase coupling mode for 2 phase and ground combined devices. After measurement their attenuation and signal - to noise ratio and other technical indexes have met the requirements for protection and communication.

关 键 词：高频通道 相间耦合 衰减 信噪比 

分 类 号：TM734[电气工程—电力系统及自动化]