REMOTE MONITORING AND SIMULATION OF 138KV UNDERGROUND POWER PIPE TYPE CABLE FORCED COOLING SYSTEM

摘要

When the load demand increases, the Forced Cooling System allows an increase in line ampacity up to one and a half times the normal rating of the system. Therefore, it is imperative that we have a method in which to monitor their temperature and pressure of the cable line to insure reliability during peak load demand. This paper describes the methodology in which we use telecommunication, that has proven to be workable and reliable. We have employed this method on the 138kV Underground Pipe Type Cable Line between University Transmission Substation (TSS) and Taylor TSS (Line 15301) that is forced cooled and divided into two hydraulic loops (University Loop and Taylor Loop). The cooling site is located at 26th and Federal Streets in Chicago which is located approximately 4 miles from University TSS.To keep load dispatchers informed of the Forced Cooling System status on a regular basis, it has been decided to install a remote monitoring system using PLC (Programmable Logic Control) programming, PC computers and telephone communication. In addition, a simulation mode was installed on the Forced Cooling System.An alternative plan to this project would be to install hard wires in a trench 6.4 miles long. The cost of this plan would be several million dollars more than the remote monitoring via telecommunication.