Title :
Impact of CT errors on protective relays - Case studies and analysis
Author_Institution :
GE Digital Energy Multilin, ON
Abstract :
Current transformers (CTs) are the basic interconnection between the power system and almost all measurement devices such as protective relays. CTs step the primary current down to a nominal secondary level for use by protective relays, meters, and other monitoring devices. One of the practical concerns for the protection engineer is the actual ability of a CT to replicate the primary current. This paper discusses several actual relay operations, and the root cause of the events behind the relay operations.
Keywords :
current transformers; power system interconnection; relay protection; transformer protection; current transformers; measurement devices; monitoring devices; power system interconnection; relay protection; Current measurement; Current transformers; Monitoring; Power measurement; Power system analysis computing; Power system interconnection; Power system measurements; Power system protection; Power system relaying; Protective relaying;
Conference_Titel :
Protective Relay Engineers, 2009 62nd Annual Conference for
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-4182-2
Electronic_ISBN :
978-1-4244-4183-9
DOI :
10.1109/CPRE.2009.4982503
