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ABBP

owerTechnologiesAB

2006-04-20 Gunnar Stranne A

Rio de JaneiroApril 23-25, 2006

Busbar protectionREB 670

Gunnar Stranne

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owerTechnologiesAB


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owerTechnologiesAB


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owerTechnologiesAB


REB 500 is enabled for use with IEC61850 communication

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owerTechnologiesAB


Benefits of REB 670 outstanding features

Very fast, minimum operating time 10 ms

Extremely stable for external faults

Additional sensitive differential protection

Smart open CT detection

One or two protection zones and check zone

Phase segregated

Very low CT requirements

Any CT ratio difference can be accommodated

Settings entered directly in primary amperes

The I/O is flexible and extendable Easy extension

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Application Areas for REB 670

Differential protection, BFR& Non-Dir OC Protectionfor:

Busbars Meshed corners,

T-protection

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Three-phase versions

REB 670-A20 for 4 bays 2 zones

REB 670-A31 for 8 bays 2 zones

Single phase and summationthree-phase versions

REB 670-B20 for 12 bays 2

zones REB670-B21 for 12 bays 2

zones

REB670-B31 for 24 bays 2

zones

Pre-configured REB 670 Ready To Use

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3-Phase Version

Two measuring zone BFR, OC, EnFP & AR

4 or 8 bays

1-Phase Version

Two measuring zones

BFR, OC, EnFP & AR 12 or 24 bays

One terminal per phase

Summation

REB 670 Preconfigured Versions

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Application Areas:

Smaller Buses (up to 8 CTs per zone)

Single Busbar Stations (with Transfer Bus) 1 Breaker Stations

Double Busbar Stations (with Transfer Bus)

Zone Interconnection included in the design

Three-Phase Terminal - 4-8 Bays - Double Zone

No switching of CT secondary circuitsNo switching of CT secondary circuits

REB 670 A31

2 Zones (A & B);8 Bays

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Capacitor Reactor

REB 670 3-Phase - Basic applications Diff & CBF

M/G

Generator/MotorAuto-Transformer

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PowerTechnologiesAB


REB 670 3- Phase - BBP, BFP & EnFP for single buses

Single Bus with bus tie CBup to 3/7 feeder bays on each side

ZA ZB

ZA

Single Busbarup to 4/8 feeder bays

T connections

ZA

ZB

Alternative CT Location

H type station with bus-section CBor sectionalizing disconnector

ZA ZB

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PowerTechnologiesAB


REB 670 3- Phase - BBP, BFP, EnFP for 1 CB stations

1 Breaker Stationsup to 4 diameters

ZA

ZB

1 Breaker Stationsup to 8 diameters

ZA

ZB

.. .

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PowerTechnologiesAB


REB 670 3- Phase - BBP, BFP & EnFP for Double CB stations


Double Breaker Station

up to 8 feeders

ZA

ZB

.. .

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PowerTechnologiesAB


REB 670 1- Phase - BBP, BFP & EnFP for double buses

Isolator replica in REB 670*1.0

by configuration

Double Bus with bus-coupler CBand up to 6/7 feeder bays

ZB

ZA

.. .

Optional Measuring Point

Double Busbars with bus coupler CB and Transfer Busup to 6/7 feeder bays

ZB

ZA

Transfer Bus

Transfer Bay

.. ... .

.. .

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PowerTechnologiesAB


EQUIPMENT INCLUDED in the PANEL:

1 pcs 3 phase, Busbar protection terminal REB 670*1.0

- two differential zones

- check zone- eight CB failure relays

- eight OC feeder backup protection (EnFP)

- internal disconnector replica logic

- internal individual bay tripping logic- disconnector status supervision

700

ABB

Scheme Layout for Double Busbar; 2 Zones/7 feeders

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PowerTechnologiesAB


Application Areas:

Bigger Buses (up to 12/24 bays per zone)

Single Busbar Stations (with Transfer Bus)

1 Breaker Stations

Double Busbar Stations (with Transfer Bus)

Load Transfer is included into the design

3 Terminals required for complete scheme

LDCM available to share binary IO

Single-Phase Terminal REB670 B21/B31; 12/24 Bays- Double Zone

No switching of CT secondary circuitsNo switching of CT secondary circuits

REB 670; Ph-L32 Zones (A & B);24 Bays

REB 670; Ph-L22 Zones (A & B);24 Bays

REB 670; Ph-L12 Zones (A & B);

24 Bays

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PowerTechnologiesAB


REB 670 1- Ph; BBP, BFP & EnFP for single buses

Single Busup to 12/24 feeder bays

ZA

.. .

Single Bus with bus-section disconnectorup to 12/24 feeder bays (i.e. 12+12; 16+8 etc.)

ZA ZB

.. . .. .

Single Bus with bus-section CBup to 11/23 feeder bays on each side

ZA ZB

.. . .. .

Single Bus with bus-section CB, up to11/23 feeder bays (i.e. 12+11; 10+13 etc.)

ZA ZB

.. ... .

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PowerTechnologiesAB


REB 670 1- Phase - BBP applications for 1 CB stations

1 Breaker Stationsup to 12 / 24 diameters

ZA

ZB

.. .

1 Breaker Stationsup to 6 / 12 diameters

ZA

ZB

.. .

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PowerTechnologiesAB


REB 670 1- Phase - BBP, CBF & EnFP for 1 CB Stations!

Bus Diff, CB Fail & EnFP1 Breaker Stationsup to 4/8 diameters

ZA

ZB

.. .

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PowerTechnologiesAB



REB 670 1- Ph; BBP, BFP & EnFP for Double CB stations


up to 6 / 12 feeders

ZA

ZB

.. .

ZA

ZB


up to 12 / 24 feeders

.. .

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PowerTechnologiesAB

2006-04-20 Gunnar Stranne A Optional Measuring Point

REB 670 1- Ph; BBP, BFP & EnFP for double buses

Double Bus with bus-coupler CBup to 22/23 feeder bays

ZB

ZA

.. .

Isolator replica in REB 670*1.0by CAP 531 Configuration

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PowerTechnologiesAB


REB 670 1- Ph; BBP, BFP & EnFP for double bus & transfer

Double Busbars with Transfer Bus

up to 22/23 feeder bays

ZB

ZA

Transfer Bus

Transfer Bay

.. .

.. .

.. .

Bus-Coupler Bay

ZB

ZA

Transfer Bus

Combined Bus-Coupler

& Transfer Bay

.. .

.. .

.. .

Isolator replica in REB 670*1.0by CAP 531 Configuration

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PowerTechnologiesAB


EQUIPMENT INCLUDED in the PANEL:

3 pcs 1 phase, Busbar protection terminal REB 670*1.0

- two differential zones

- check zone- 24 CB failure relays

- 24 OC feeder backup protection (EnFP)

- internal disconnector replica logic

- internal individual bay tripping logic- disconnector status supervision

700

ABB

Scheme Layout for Double Busbar; 2 Zones/22 feeders

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PowerTechnologiesAB


REB 670 1-Phase version - for double buses

Four Zone Double Bus with two BC-CBs one BS-CB and one sectionalizingdisconnector with up to 18-20 feeder bays in the whole station

Optional Measuring Point

Four Zone Double Bus with two bus-coupler CBs and twobus-section CBs and up to 20/21 feeder bays on each station side.

BBP, BFP & EnFP included

Reserve 2

Main 2

Reserve 1

Main 1

.. ... .

Reserve 2

Main 2

Reserve 1

Main 1

.. ... .

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PowerTechnologiesAB


Buses up to 24 bays per zone

Single Busbar

1 Breaker Systems Double Busbar

Same applications possible as for 1Ph solution

Software Driven Zone Selection

Cost effective Solution

REB 670; 1 Ph

2 Zones (A & B);

24 Bays

+ N+ N timestimes

NN 88

REB 670 1-phase version summation transformers

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PowerTechnologiesAB


REB 670 Allocation of Software Functionality

Zone Selection

Dynamic Software CT switching(i.e. no switching in CT secondarycircuits neither interposing CTs

are required) Easy adaptation to different

substation layouts such as: singleor double bus (with transfer bus),one-and-half or double breaker,etc.

Simple adaptation to buses withonly one set of CTs in the bus-section or bus-coupler bays

Selective BBP & BFP tripping forevery bay

Merging of the two differentialzones when required (i.e. duringload transfer in double busbarstations)

Disconnector and/or circuit

breaker status supervision

Differential Zones

High speed tripping for internalfaults. Typical operating time 12ms

Complete stability for throughfaults, with heavy CT saturation,and a maximum remanence in theCT core at auto-reclosing

Low CT requirement, only 2milliseconds to saturation neededfor correct operation

Intelligent detection for open or

shorted CT secondary circuits and

settable blocking of differentialprotection zone

Sensitive differential protection

stage for power systems withlimited earth-fault current

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PowerTechnologiesAB


REB 670 Software Structure / Function Blocks

Zone Selection

Primary Switchgear Objects

Status (i.e. disconnector and

breakers) Bay

(Interface towards onePrimary Bay)

Zone Interconnection(Merging of two zones whenrequired)

Differential Zones

Zone A

(Id>, OCT, Sensitive Id>)

Zone B(Id>, OCT, Sensitive Id>)

Check Zone (Id>)

One BasicFunction in AFL,

Hiddenconnections exist

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Very fast, minimum operating time 10 ms


Completely phase segregated measurement

Differential algorithm not dependent on the number of connected feeders

Very low CT requirements, only 2 ms before CT saturation

Any CT ratio difference can be accommodated

Settings entered directly in primary amperes

Differential Protection in REB 670

Differential protectionoperation characteristic

Operateregion

Diff Oper Level

Id[P

rimaryAmps]

Iin

[Primary Amps]

s=0.53

I d=I i

n

Sensitive Oper Level

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Used in low impedance earthed power system or in otherspecial applications

It has the following characteristics:

Freely settable characteristic with time delay possibility

Automatically blocked for heavy ph-to-ph faults

External release via binary signal (i.e. from open delta

voltage, transformer neutral point current, etc.)

Sensitive Differential Protection in REB 670


Operateregion

Diff Oper Level

Id[P

rimaryAmps]

Iin

[Primary Amps]

s=0.53

I d=I i

n

Sensitivedifferentialprotection

en04000260.vsd


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Operateregion

Diff Oper Level

Id[PrimaryAmps]

Iin

[Primary Amps]

s=0.53

I d=I i

n

Sensitivedifferentialprotection

en04000260.vsd


Slow and Fast Open CT detection

Settable influence of slow and fast open CT logic:

Off (switched off)

Block (differential protection)

Supervise (Doesn't block, just increase minimumdifferential operation level as shown below)

Open CT detection for REB 670

OCT Logic Supervision Level

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Independent check zone available

Can be switched off (default setting)

Freely settable which CTs shall be connected to check zone Provide stability in case of problem with disconnector

auxiliary contacts ( stuck contacts or wiring problems)

Check Zone in REB 670

Oper Level

s=0.0-0.90 (settable)

Iout[Primary Amps]

Id[PrimaryAmps

]

Operateregion

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BPowerTechnologiesAB


Two new types of Diff Zone supervision are available

Id> traditional supervision of differential current levelwith settable time delay(i.e. can be used as alarm or for

automatic reset of OCT condition)

Iin> incoming current supervision, without time delay

(i.e. can be used to trigger DR for external faults)

Zone Supervision in REB 670

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Disconnector/CB supervision & alarming

For every disconnector/CB status is determined from the

status of aux contacts (i.e. a & b contacts)

Two schemes available depending on philosophy, a or b or both

Position of a disconnector/CB can be forced to OPEN or

CLOSED by a parameter setting

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Easy to set, configure, install & use

Pre-configured for most typical substation layouts

Bay connection matrix built-in (large HMI)

Switchgear Status Matrix (large HMI)

User Features in REB 670 (3-Ph & 1-Ph)

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Bay-Connections & Switchgear Status Matrices

UserSettableBay Name

InternallyUsed BayFB

Connectionsto internalzones

User SettableSwitchgear

Names

SwitchgearObject

Status

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Breaker Failure Protection

Complete breaker failure protection with:

1ph and/or 3ph starting

Re-trip after a set time delay

Backup trip / bus-strip (i.e. second time delay)

Short reset time of 15ms

Trips CBs via busbar disconnector replica

Integrated station wide trip logic available from Zone Selection

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E d F lt P t ti

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End Fault Protection

Feeder

Protection

Busbar

Protection

FeederProtection

BusbarProtection

CT=Measuring Boundary

CB=Clearing Boundary

When feeder CB isopen, stopmeasuring

boundary at theopen CB contactsin order to avoid

over-trip and

activate fast OC

protection to tripremote end only

When feeder CB is

open, extendmeasuringboundary to theopen CB contactsin order to avoid

under-trip

Over-TripZone

Under-TripZone

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S REB 670 b b t ti

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Summary - REB 670 busbar protection

Complete and fast differential protection (10-12ms)

One or two protection zones and check zone


Additional sensitivity

Low CT requirements - open CT detection any CT ratio

Advanced zone selection & integrated zone interconnection

Disconnector and/or CB position supervision & alarming

CB failure and 4-stage backup overcurrent protection

Disturbance and event recording Preconfigured versions with flexible and extendable I/O

Easy extension

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Documents

18 REB 670 IED