pilot protection with digital relays
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Pilot Protection With Digital RelaysTRANSCRIPT
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A Primer On PilotProtection With DigitalRelays
Sinan SayginGE Digital Energy, Carlsbad, CA , USA
Ilia Voloh !hiying!hangGE Digital Energy, #ar$ham,
CA%ADA &e'as A# Relay Con(erence )*+
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%on-Pilot Aided - Ste..ed DistanceSchemes
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%on-Pilot Aided - Ste..ed DistanceSchemes
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%on-Pilot Aided - Ste..ed DistanceSchemes
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Pilot Aided Schemes
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Pilot Aided Schemes
Communication Channels make all thediference
/iber O.tic0 1ery high s.eed, a1ailability andband2idth, not a3ected d4ring (a4lts5
#icro2a1e0 high s.eed, a3ected by 2eather
conditions, 1egetation gro2th, etc5 highband2idth5
Po2er 6ine Carrier0 6o2 band2idth and can
be se1erely a3ected d4ring (a4lts
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Power Line CarrierOn-O3 7eying - Carrier signal is either O% orO//,%o in(o i( the comm4nication channel 2or$s5
/re84ency Shi(t 7eying 9/S7: ; &2o/re84encies called G4ard and &ri., 6oss o(channel can be detected5
Pilot Aided Schemes
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Pilot Aided Schemes
DUTT ; Direct Under-reaching &rans(er &ri.PUTT ; Permissi1e Under-reaching &rans(er
&ri.
POTT ; Permissi1e O1er-reaching &rans(er
&ri.Hybrid POTT ; <ybrid Permissi1e O1er-reaching &rans(er &ri.
DCB ; Directional Com.arison =loc$ingScheme
DCUB ; Directional Com.arison Unbloc$ingScheme
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Pilot Aided Schemes - DU&&
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Pilot Aided Schemes ; PU&&,Acceleration
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Pilot Aided Schemes ; PO&&
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Pilot Aided Schemes ; PO&&
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Pilot Aided Schemes ; <ybrid PO&&
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Pilot Aided Schemes ; <ybrid PO&&
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Pilot Aided Schemes ; <ybrid PO&&
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Pilot Aided Schemes ; DC=
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Pilot Aided Schemes ; DC=
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Pilot Aided Schemes ; DCU=
%ormal Conditions
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%ormal Conditions Channel /ail4re
Pilot Aided Schemes ; DCU=
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PO&& #ode
Pilot Aided Schemes ; DCU=
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DC= #ode
Pilot Aided Schemes ; DCU=
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Digital Protection &echnology
Advanced Alorithms%e2 Calc4lation #ethods
/ast, Selecti1e, Reliable and Acc4rate
S4.erim.osed , DE6&A Val4es
Phase, Direction, /a4lt
Se84ence Val4es
Phase, Direction, /4se /ail4re
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Digital Protection &echnology
Advanced AlorithmsPhase Selection =y Se84ence Voltages andC4rrents
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Digital Protection &echnology
Advanced Alorithms/le'ible Programmable 6ogic Schemes Using0
=4ilt- in .rotection elements 9e5g5 +P, >?%, )?Petc5:
A4'iliary (4nctions 9logic gates, timers, bloc$ingetc5:
&he logic consist o(0
O.erators 0 logic gates, timers, latches
O.erands0 states o( in.4ts, elements, schemes,o4t.4ts, P4shb4ttons5
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Digital Protection &echnology
Advanced AlorithmsState o( each o.erand monitored in 1eryshort inter1als 9+-) msec:
Gate o4t.4ts assigned to relay o4t.4ts,another gate or a 1irt4al o4t.4t 2hich can be4sed as an in.4t to a ne2 logic chain
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DC= =loc$ing =y C4rrentential Relays
!"ternal #aults
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DC= =loc$ing =y C4rrentential Relays
#ain + C4rrent Di35 #ain ) DC=, E'ternal/a4lts
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A Primer On Pilot Protection Withelays