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ABBABBSw
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TeleComm/2003-10-01/RW
Technology and SolutionsProtection and Substation Automation
Topic:
REL316*4Distance Protection
using Tele-
CommunicationSchemes
BASICSBASICS
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ABBABBSw
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Tele
Comm/2003-10-01/RW
REL316*4 Distance Protection with Tele- Communication
Objectives
Problem Description
Solution Basic Tripping Schemes
PUTT - Permissive Underreaching Transferred Tripping
POTT - Permissive Overreaching Transferred Tripping
BLOCK OR - BLOCKing OverReaching
DTT - Direct Transfer Trip
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REL316*4 Problem Description
Starter Zone 2Zone 3
Overreach zone
Starter
Zone 1Zone 3
Zone 1
Overreach Zone
Reverse Zone
R
Starter
Zone 2
Faults near the ends of the line
section will be cleared at zone 2
time, with additional time delay
(this is often acceptable at the distribution
level, if fast reclosure is not required)
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BBSw
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RE.3
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Tele
Comm/2003-10-01/RW
REL316*4 Solution
Tele- Communication Schemes
allow
High speed tripping for all kind of faultsoccurring on 100% of the protected line
Strict selectivity between two stations
108 .. 109 VA(1 GVA)
10 -8 Watt(- 50dBm)
Station A Station B
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RE.3
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Tele
Comm/2003-10-01/RW
REL316*4 Basic Tripping Schemes
PUTT: Permissive Underreaching
Transferred Tripping
POTT: Permissive Overreaching
Transferred Tripping
BLOCK OR: BLOCKing OverReaching
DTT: Direct Transfer Trip
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TeleComm/2003-10-01/RW
REL316*4 PUTT (basic)
Starter
Z underreaching
Z underreachingStarter
&TRIP
Z- underreaching
& TRIPStarter *)
RX
Starter *)T 2
&Starter
&
Z-underreaching
Starter
RX
*) Alternatively:
Starter + U-We
T 2
1 1Z- underreaching
Z- underreaching
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TeleComm/2003-10-01/RW
REL316*4 PUTT (basic)
&
Z underreaching
&
TRIP
Starter *)
Z under-
reaching
Starter *)
Z underreaching
Z underreaching
&Starter
&
TRIP
Starter
RX
*) Alternatively:
Starting + U-Weak
Starter
Starter
T 2T 2
Z- underreachingZ- underreaching
RX
1 1
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REL316*4 POTT (basic)
Starter
&TRIP Z overeaching
RX
Z overeaching
& TRIPZ overeaching
RX
Z overeaching
Z overreaching
Z overreaching
Starter
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TeleComm/2003-10-01/RW
REL316*4 POTT (basic)
Starter
&TRIP Z overeaching
RX
Z overeaching
& TRIPZ overeaching
RX
Z overeaching
Z overreaching
Z overreaching
Starter
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TeleComm/2003-10-01/RW
REL316*4 BLOCK OR (basic)
Z1Z reverse Z overreaching
Z overreaching Z reverseZ1
Z2
Z3Starter
Z1, t1; Z2, t2; Z3, t3; Starter, tEndZ1, t1; Z2, t2; Z3, t3; Starter, tEnd
Z overeachingZ over-
reaching
&
Z reverse
&
Z reverse
TRIP
Z overeaching
RX
&
&20 ms
t wait (t1Block)TRIP TRIPt wait (t1Block)Z overeaching
Loos of signal&
Loos of signal&TRIP20 ms
RX
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TeleComm/2003-10-01/RW
REL316*4 BLOCK OR (basic)
Z reverse Z overreachingZ1
Z overreaching Z reverseZ1
Z2
Z3Starter
Z1, t1; Z2, t2; Z3, t3; Starter, tEndZ1, t1; Z2, t2; Z3, t3; Starter, tEnd
Z overeachingZ over-
reaching
&
Z reverse
&
Z reverse
TRIP
Z overeaching
RX
&
&20 ms
t wait (t1Block)TRIP TRIPt wait (t1Block)Z overeaching
Loos of signal&
Loos of signal&TRIP20 ms
RX
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REL316*4 DTT (basic)
TRIPTRIP
RX
Starter
Z underreaching
Z underreachingStarter
&Starter
&
Z-underreaching
Starter
1 1Z- underreaching
RX
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RE.3
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TeleComm/2003-10-01/RW