Title :
Coupling to control cables in HV substations
Author :
Lodwig, Stephen G. ; Schuetz, Carl C.
Author_Institution :
ComEd Substation Eng. Services, Exclon Corp., Willowbrook, IL, USA
Abstract :
PLCs and microprocessor relays located in control buildings inside the HV substations were subject to electrical interference in the substation yard during high voltage air disconnect switching. The interference was due to modifications to a circuit breaker that produced common mode voltages on control circuit wiring in the substation control building and led to equipment damage and misoperation. This paper describes the unusual coupling mechanism that created transient voltages, a comparison between predicted and measured transients, and a description of use of shielded cable to minimize interference coupling
Keywords :
cable shielding; cables (electric); circuit breakers; electromagnetic coupling; electromagnetic interference; interference suppression; programmable controllers; relays; substations; switching; transient analysis; HV substations; PLC; circuit breaker modifications; common mode voltages; control buildings; control circuit wiring; coupling mechanism; electrical interference; equipment damage; equipment misoperation; high voltage air disconnect switching; interference; interference coupling minimisation; measured transients; microprocessor relays; predicted transients; shielded cable; substation yard; transient voltages; Cables; Circuit breakers; Coupling circuits; Interference; Microprocessors; Programmable control; Relays; Substations; Voltage control; Wiring;
Conference_Titel :
Electromagnetic Compatibility, 2001. EMC. 2001 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-6569-0
DOI :
10.1109/ISEMC.2001.950621
