Current Transformer

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henry98 Associate Join Date: Mar 2019 Posts: 29	Current Transformer 02/01/2020 11:10 AM
	dear all please can anyone explain to me what is the mutual compensation current transformer and when it is used thanks
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Rixter Guru Join Date: Apr 2010 Location: About 4000 miles from the center of the earth (+/-100 mi) Posts: 9910 Good Answers: 1141	#1 Re: current transformer 02/01/2020 6:30 PM
	I believe the answer is that many times you have multiple power transmission lines running along the same route, using the same towers. Coupling between good and faulted transmission lines causes an error with remote fault location. Current transformers are used with the fault locator to compensate for this error. https://www.academia.edu/34320490/Analysis_Of_Fault_Location_For_Transmission_Lines https://store.gegridsolutions.com/FAQ/Documents/Alps/GER-3964.pdf http://www.erlphase.com/downloads/application_notes/Using_Parallel_Line_Mutual_Coupling_Compensation_LPRO_Distance_Relay.pdf
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#2 Re: current transformer 02/01/2020 6:35 PM
	...."The issue of mutual compensation relates to the setting reach that a ground distance relay encounters during ground faults when parallel lines are present. ... This method is used for convenience so that the phase distance relays and the ground distance relays can be set to the same point on the protected line."... http://www.erlphase.com/downloads/application_notes/Using_Parallel_Line_Mutual_Coupling_Compensation_LPRO_Distance_Relay.pdf __________________ All living things seek to control their own destiny....this is the purpose of life
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Stef Guru Join Date: May 2018 Location: Under the spreading Bunya Trees, South Burnett, Queensland, Australia Posts: 807 Good Answers: 65	#3 In reply to #2 Re: current transformer 02/02/2020 2:58 AM
	In many years of testing distance relays after faults they invariably worked correctly but given real world faults the outcome of the tripping was never as the engineers planned for the trips would show up in once removed trip relays. Can we blame it on gravity waves or wavering gravity? __________________ Hare today, goon tomorrow!
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Amulya Active Contributor Join Date: Feb 2020 Posts: 10	#4 Re: Current Transformer 03/10/2020 7:49 AM
	mutual compensation current transformer applies to the complexity of ground distance relay experiences when parallel lines are present during ground failures. This approach is used to make the phase distance relays and the floor distance relays on the covered line the same level.
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Amulya (1); Rixter (1); SolarEagle (1); Stef (1)

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