The Real-time Simulational Research About the Station Network of Intelligent Substation

In combination with 220 kV intelligent substation station network,models are built with OPNET software.With the client/server model of OPNET to imitate the data's ETE transmission,the real-time simulational research on station network are in a different message size and interval,different CPU utilization and the different transmission protocol cases.Results show that,with the increase from 64 bytes to 2 048 bytes packet size,ETE delay increases from0.2 ms to 3 ms;with the packet interval increase from0.02 sto 3s,ETE delay increases from 1.2ms to 1.75ms;with the CPU utilization rate increase from 10% to 90%,ETE delay increases from 0.03 ms to 0.2ms;the ETE delay of using UDP protocol is about 0.02 ms smaller than using TCP protocol.It is proved that the effect of factors in realtime message transmission also has the vital significance in choosing proper network equipment in the practical application and configurating network parameters more effectively.