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ABBABBSw

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RE.3

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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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ABBABBSw

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RE.3

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Tele

Comm/2003-10-01/RW

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

16_

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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ABBABBSw

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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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ABBABBSw

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RE.3

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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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ABBABBSw

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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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ABBABBSw

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RE.3

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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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ABBABBSw

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RE.3

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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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TeleComm/2003-10-01/RW

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