Double Routing Transformation for East China 500kV Line Protection Channel
The safety of the relay protection channel is always the top priority of electric power communication network security.It is vital for the safe and stable grid operation to avoid the risk of cable interruption,leading to the relay protection signal transmission failure,even forced outage.The transmission line relay protection channel requirements for different voltage levels also vary.Combined with the current situation and problems of relay protection channels,this paper analyzes the three presented technical schemes for East China 500kV line,and technically discusses how to improve the reliability of protection channel operation by increasing routing modes.
East China Power Grid500kV transmission linerelay protection channel
NETL
NSTL
万方数据
