THE COMMUNICATION SYSTEMS USED IN THE SCADA SYSTEM CREATE DELAYS DUE TO VARIOUS FACTORS SUCH AS LIMITATION OF THE TRANSMISSION BANDWIDTH, SWITCHING DELAY AMONG NODES, PROCESSING TIME, ETC. THESE DELAYS CAUSE ERROR NOUS SITUATION IN THE MEASUREMENTS NEEDED FOR CONTROL CENTER WHICH DEPENDS ON THE MAGNITUDE OF THE DELAY AND THE EVOLUTION OF THE MEASUREMENTS. TODAY NEW CONFIGURATION OF SCADA SYSTEM IS IMPLEMENTED BASED ON TCP/IP, BECAUSE IT IS FLEXIBLE IN COMMUNICATION AND INFORMATION SYSTERMS OF POWER SYSTEM. IN THIS THESIS, AN INFORMATION MODEL OF THE POWER SYSTEM CONTROL AND MONITORING SYSTEM BASED ON TCP/IP RELATIONSHIP BETWEEN MEASUREMENT ERROR AND DELAY IS PRESENTED. THE VALIDITY OF THE MODEL IS CONFIGURED WITH EXPERIMENTAL DATA FROM A POWER SYSTEM MODEL IMPLEMENTED ON LOCAL AREA NETWORK (LAN) AND DIAL UP LINES AS TELECOMMUNICATION LINKS.