NDLI: Ground distance relay compensation in the presence of delta-hexagonal phase shifting transformer

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The Journal of Engineering

Ground distance relay compensation in the presence of delta-hexagonal phase shifting transformer

Content Provider	IET Digital Library
Author	Ghorbani, Amir Arablu, Masoud
Abstract	In this study, the effects of the delta-hexagonal phase shifting transformers (PSTs) on the operation of distance relays and their trip boundaries are investigated under different fault resistances and locations. Existence of fault resistance in phase-to-ground faults creates an unreliable operation of distance relays. Trip boundaries are used to determine the fault resistance effects on the impedance calculated by the relay. Moreover, PSTs are used to control the power flow in transmission lines. Finally, a feasible method for eliminating the PSTs detrimental effects on the operation of the distance relays is presented. This method, which uses the voltage difference between the PST terminals, is getting prevalent in modifying the operation of the distance relays even under the high resistance faults. Phasor measurement units (PMUs) are used to calculate this voltage as PMU signals and a remote signal system is used to transmit them to the system protection centre. All the simulations are conducted with Electro-Magnetic Transient Program.
Starting Page	2091
Ending Page	2098
Page Count	8
ISSN	17518687
Volume Number	9
e-ISSN	17518695
Issue Number	Issue 15, Nov (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/9/15
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2015.0526
Journal	IET Generation, Transmission & Distribution
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Delta-hexagonal Phase Shifting Transformer Electromagnetic Transient Programme Fault Location Fault Locations Fault Resistance Ground Distance Relay Compensation Load Flow Control Phase-to-ground Fault Phasor Measurement Phasor Measurement Unit PMU Power Flow Control Power System Control Power System Measurement And Metering Power System Protection Power Transformer Power Transmission, Distribution And Supply PST Relay Protection System Protection Centre Transformer And Reactors Transmission Line Voltage Difference
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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