b90 presentation

8/9/2019 b90 Presentation

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B90 Bus Differential Relay and Breaker Failure Protection

Cost-efficient

Good performance

Modern communications capability

Member of the Universal Relay (UR) family Easy integration with other URs

Common configuration tool for all B90 IEDs

Proven algorithms (B30) and hardware (UR)

Expandable

Two levels of scalability (modules and IEDs)


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N

E

W

!

Busbar Protection Schemes

High-impedance / linear couplers

non-configurable busbars

cheap relay, expensive primary equipment

Blocking schemes for simple busbars

Analog low / medium - impedance schemes

Digital relays for small busbars

Digital relays for large busbars Phase-segregated cost-efficient digital relays

for large busbars

B90

B30

BUS

PVD

Any

SPD

GE offer Approach


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Why Digital Bus Relay?

Re-configurable busbars require dynamic assignmentof currents to multiple zones

expensive and dangerous when done externally onsecondary currents (analog way)

natural and safe when done in software

Breaker Fail for re-configurable busbars is naturallyintegrated with the bus protection

No need for special CTs (cost)

Relaxed requirements for the CTs (cost) Advantages of digital technology


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Design Challenges for Digital Busbar Relays

Reliability Security:

Immunity to CT saturation

Immunity to wrong input information

Large number of inputs and outputs required: AC inputs (tens or hundreds)

Trip rated output contacts (tens or hundreds)

Other output contacts (tens)

Digital Inputs (hundreds) Large processing power required to handle al the data


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B90 Capacity

Up to 24 circuits in a single zone without voltage

supervision

Multi-IED architecture with each IED built on modular

hardware Up to 24 AC inputs per B90 IED freely selectable

between currents and voltages (24+0, 23+1, 22+2, ..)

Up to 96 digital inputs per B90 IED

Up to 48 output contacts per B90 IED Flexible allocation of AC inputs, digital inputs and output

contacts between the B90 IEDs


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B90 Features and Benefits

Maximum number of circuits in one zone: 24 Number of zones : 4

Busbar configuration: No limits

Sub-cycle tripping time

Security (only 2msec of clean waveforms required for stability)

Differential algorithm supervised by CT saturation detection anddirectional principle

Dynamic bus replica, logic and signal processing

No need for interposing CTs (ratio matching up to 32:1)

CT trouble per each zone of protection

Breaker failure per circuit

End fault protection (EFP) per circuit

Undervoltage supervision per each voltage input

Overcurrent protection (IOC and TOC) per circuit

Communication, metering and recording


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B90 Applications

Busbars:

Single

Breaker-and-a-half

Double Triple

With and without transfer bus

Networks:

Solidly grounded Lightly grounded (via resistor)

Ungrounded


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B90 Architecture Overview

Phase-segregated multi-IED system built on Universal

Relay (UR) platform

Each IED can be configured to include up to six

modules: AC inputs (up to 3 x 24 single phase inputs)

Contact outputs (up to 6 x 8)

Digital Inputs (up to 6 X 16)

Variety of combinations of digital inputs and outputcontacts

Fast digital communications between the IEDs for

sharing digital states


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B90 Architecture

B90

P

P

S

UR #1

CP

U

D

SP

I

/O

D

SP

I

/O

D

SP

I

/O

phase A currents & voltages

fiber,ringconfiguration

phase A trip contacts

PS

C

PU

UR #2 Phase B Protection

D

SP

I/O

D

SP

I/O

D

SP

I/O

CO

MMS

phase B currents & voltages

phase B trip contacts

P

S

CP

U

UR #3 Phase C Protection

DSP

I/

O

DSP

I/

O

DSP

I/

O

COMMS

phase C currents & voltages

phase C trip contacts

PS

C

PU

UR #4 Bus Replica & Breaker Fail

I/O

I/O

I/O

I/O

I/O

I/O

CO

MMS

No A/C data traffic No need for sampling

synchronization,straightforward relayconfiguration - all A/C signalslocal to a chassis

Data traffic reduced to I/Os

Direct I/Os (similar to existingUR Remote I/Os) used forexchange of binary data

Oscillography capabilitiesmultiplied (available in eachIED separately)

Programmable logic(FlexLogic) capabilitiesmultiplied

SOE capabilities multiplied

Extra URs in a loop for moreI/Os


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B90 Components: Protection IEDs

Modular architecture (from 2 to 9 modules) All modules but CPU and PS optional

Up to 24 AC inputs total (24 currents and no

voltages, through 12 currents and 12

voltages)

Three I/O modules for trip contacts or extra

digital inputs Features oriented towards AC signal

processing (differential, IOC, TOC, UV, BF

current supervision)

Po

werSu

pply

CPU

DSP1

I/O

DSP2

I/O

DSP3

I/O

Comms

8AC

single

-phaseinputs

8AC

single

-ph

aseinputs

8AC

single

-ph

aseinputs

OtherUR-basedIEDs

B90 is built on UR hardware (4 years of field experience)B90 is built on UR hardware (4 years of field experience)


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B90 Components: Logic IEDs

Modular architecture (from 2 to 9 modules) All modules but CPU and PS optional

Up to 96 digital inputs or

48 output contacts or

Virtually any mix of the above

Features oriented towards logic functions (BF

logic and timers, isolator monitoring andalarming)

Po

werSu

pply

CPU

OtherUR-bas

edIEDs

I/OI/O

I/OI/O

I/OI/O

Comms

B90 is built on UR hardware (4 years of field experience)B90 is built on UR hardware (4 years of field experience)


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B90 Scheme for Large Busbars

Dual (redundant) fiber with

3msec delivery time betweenneighbouring IEDs. Up to 8

B90s/URs in the ring

Phase A AC signals and

trip contacts

Phase B AC signals and

trip contacts

Phase C AC signals and

trip contacts

Digital Inputs for isolator

monitoring and BF


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Security of the B90 Communications

Dual (redundant) ring each message send

simultaneously in both directions

No switching equipment (direct TX-RX connection)

Self-monitoring incorporated Information re-sent (repeated) automatically

32-bit CRC

Default states of exchanged flags upon loss of

communications (allows developing secureapplications)


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B90 Communications

The communications feature (Direct I/Os) requires

digital communications card (dual-port 820nmm LED)

Up to 96 inputs / outputs could be sent / received

Up to 8 UR IEDs could be interfaced When interfacing with other URs, 32 inputs / outputs

are available

The Direct I/O feature is modeled on UCA GOOSE but

is sent over dedicated fiber (not LAN) and is optimizedfor speed

User-friendly configuration mechanism is available

Simple applications do not require communications


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Typical B90 Applications for Large Busbars

7 to 24 feeders

Basic: 87 & BF

for less than 16

feeders

Extended: BF for more

than 16 feeders

Full version: 24 Feeders

with BF.

1 2 3 23 24

ZONE 1

1 2 3 21 22

ZONE 1

ZONE 2

23 24


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Typical B90 Applications for Large Busbars

7 to 24 feeders

7 to 24 feeders

1

2

3

4

21

22

23

24

ZONE 1

ZONE 2

1 2 11

ZONE 1

12 13 22

23 24ZONE 2


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B90 and Small Single Busbars 8-circuit busbar

Two levels of scalability allow flexible applicationsTwo levels of scalability allow flexible applications

PowerSupply

CPU

DSP1

I/O

DSP2

I/O

DSP3

I/O

Spare

8phase-A

currents

8phase-B

currents

8phase-C

currents

DiffZon

e1

DiffZon

e2

DiffZon

e3

One B90 IED with 3 zones

could protect a single

8-circuit busbar!

One B90 IED with 3 zones


8-circuit busbar!


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PowerSu

pply

CPU

DSP1

I/O

DSP2

I/O

DSP3

I/O

Spare

8phase-A

currents

4phase-A

currents

8phase-B

currents Two B90 IEDs with 2 zones


12-circuit busbar!

Two B90 IEDs with 2 zonescould protect a single

12-circuit busbar!

4phase-B

currents

PowerSu

pply

CPU

DSP1

I/O

DSP2

I/O

Spare

Spare

Spare

8phase-C

currents

4phase-C

currents



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PowerSupply

CPU

DSP1

I/O

DSP2

I/O

Spare

Spare

Spare

8phase-A

currents

8phase-A

currents

PowerSupply

CPU

DSP1

I/O

DSP2

I/O

Spare

Spare

Spare

8phase-B

currents

8phase-B

currents

PowerSu

pply

CPU

DSP1

I/O

DSP2

I/O

Spare

Spare

Spare

8phase-C

currents

8phase-C

currents

Three B90 single-zone IEDs

could protect a single16..24-circuit busbar!

Three B90 single-zone IEDs

could protect a single16..24-circuit busbar!



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Applicability to Ungrounded and Lightly Grounded Systems

Three phase protection units for phase-to-phase faults and

saturation detection

Fourth unit with AC inputs for zero-sequence differential

protection (fed from split-core or regular CTs)

B90 can be applied to solidly and lightly grounded

as well as ungrounded systems

B90 can be applied to solidly and lightly grounded

as well as ungrounded systems

IA IB IC

3I0

Phase A Phase B Phase C

Ground

Block

onextern

alfaults


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B90 Configuration Program

(1) B90 Protection system is

a site

(2) That includes the

required IEDs

(3) Functions available for

dealing with all IEDs

simultaneously

URPC program used for configuration Common setting file for all B90 IEDs

All B90 can be accessed

simultaneously

Off-line setting files can easily be

produced


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B90 Algorithms

Bus differential protection

Dynamic bus replica

Isolator monitoring and alarming

End Fault Protection Breaker Failure


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differential

r e s t r a i n i n g

CT Saturation Problem

External fault:

CT ratio

mismatch

t0 fault inception

t2 fault conditions

t0

t2

I d i l S


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differential


CT Saturation Problem

External

fault: CT

saturation

t0 fault inception

t1 CT saturation time

t2 CT saturated

t0

t1

t2

I d t i l S t


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Differential Protection

B90 algorithms aimed at:

Improving the main differential function by providing

better filtering, faster response, better restraining

technique, robust switch-off transient blocking, etc. Incorporating a saturation detection mechanism that

would recognize CT saturation on external faults in

a fast and reliable manner

Applying a second protection principle namelyphase directional (phase comparison) for better

security

I d t i l S t


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Bus Differential Function Block Diagram

I d t i l S t


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B90 Differential Function Theory of Operation

Definition of the Restraining Current

Operating Characteristic

CT Saturation Detector

Default Tripping Logic Customizing the Tripping Logic

I d t i l S t


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maximum of

geometrical average

scaled sum of

sum ofnR iiiii ++++= ...321

( )nRiiii

ni

++++=...

1

321

( )nR iiiiMaxi ,...,,, 321=

nnR iiiii = ...321

Various Definitions of the Restraining Signal

I d t i l S t


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Restraining Current

The amount of restraint provided by various definitions

is different; sometimes significantly different particularly

for multi-circuit differential elements such as busbar

protection

When selecting the slope (slopes) one must take into

account the applied definition of the restraining signal

The B90 uses the maximum of definition of the

restraining current

I d t i l S t


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Sum of vs. Max of definitions of restraint

Sum of approach:

more restraint on external faults; less sensitivity on internal faults

scaled sum of may take into account the actual number ofconnected circuits increasing sensitivity

characteristic breakpoints difficult to set

Max of approach (B30, B90 and UR in general):

less restraint on external faults

more sensitivity on internal faults

breakpoints easier to set

better handles situations when one CT may saturate completely(99% slope settings possible)

Industrial Systems


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Differential Function Characteristic

differential


L O W

S L O P E

O P E R A T E

B L O C K

IR

| ID

|

H I G H

S L O P E

LOWB

PN

T

HIGHBPNT

P I C K U P

Industrial Systems


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Differential Function Adaptive Approach

differential


R e g i o n 1

( l o w d i f f e r e n t i a l

c u r r e n t s )

R e g i o n 2

( h i g h d i f f e r e n t i a l

c u r r e n t s )

low currents

saturation possible due to dc offset

saturation very difficult to detect

more security required

large currents quick saturation possible due to

large magnitude

saturation easier to detect

security required only if saturation

detected

Industrial Systems


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Adaptive Logic

DIF1

DIR

SAT

DIF2

OR

AND

O

RTRIP

AND

Industrial Systems


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Adaptive Approach

differential


R e g i o n 1

( l o w d i f f e r e n t i a l

c u r r e n t s )

R e g i o n 2

( h i g h d i f f e r e n t i a l

c u r r e n t s )

Dynamic 2-out-of-2,

1-out-of-2 operating

mode

2-out-of-2operating

mode

Industrial Systems


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Directional Principle

DIF1

DIR

SAT

DIF2

OR

AND

O

RTRIP

AND

Industrial Systems


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Voltage signal is not required

Internal faults:

all fault (large) currents approximately in phase

External faults:

one current approximately out of phase

Secondary current of

the faulted circuit

(deep CT saturation)

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Implementation: step 1: select fault contributors

A contributoris a circuit carrying significant amount of current

A circuit is a contributor if its current is above higher breakpoint

A circuit is a contributor if its current is above a certain portionof the restraining current

step 2: check angle between each contributor and the sum of allthe other currents

Sum of all the other currents is the inverted contributor if thefault is external; on external faults one obtains an angle of 180

degrees step 3: compare the maximum angle to the threshold

A threshold is a factory constant of 90 degrees

An angle shift of more than 90 degrees due to CT saturation isphysically impossible

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External Fault

B L O C K

O P E R A T E

B L O C K

pD

p

II

I

real

pD

p

II

Iimag

Ip

ID

- Ip

E x t e r n a l F a u l t C o n d i t i o n s

O P E R A T E

Industrial Systems


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Internal Fault

B L O C K

B L O C K

pD

p

II

Ireal

pD

p

II

Iimag

Ip

ID

- Ip

I n t e r n a l F a u l t C o n d i t i o n s

O P E R A T E

O P E R A T E

Industrial Systems


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Saturation Detector

DIF1

DIR

SAT

DIF2

OR

AND

O

RTRIP

AND

Industrial Systems


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differential


Saturation Detector

t0

t1

t2

t0 fault inception

t1 CT starts to saturate

t2 external fault underheavy CT saturation

conditions

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Saturation Detector The State Machine

NORMAL

SAT := 0

EXTERNAL

FAULT

SAT := 1

EXTERNAL

FAULT & CT

SATURATION

SAT := 1

The differential

characteristicentered

The differential-

restraining trajectory

out of the differentialcharacteristic for

certain period of time

saturation

condition

The differential

current below the

first slope for

certain period of

time

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Saturation Detector

Operation:

The SAT flag WILL NOT be set during internal faults

whether or not any CTs saturate

The SAT flag WILL be SET during external faultswhether or not any CTs saturate

By design the SAT flag is NOT used to block the

relay but to switch to 2-out-of-2 operating principle

Industrial Systems

2 0 0


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Examples External Fault

0 .06 0 .07 0 .0 8 0 .0 9 0 .1 0 .1 1 0 .1 2-200

-150

-100

-5 0

0

5 0

1 0 0

1 5 0

~ 1 m s

T h e b u s d i f f e r e n t i a l

p r o t e c t i o n e l e m e n t

p i c k s u p d u e t o h e a v y

C T s a t u r a t i o n

T h e C T s a t u r a t io n f l a g

i s s e t s a f e l y b e f o r e t h e

p i c k u p f l a g

D e s p i t e h e a v y C T

s a t u r a t i o n t h e

e x t e r n a l f a u l t c u r r e n t

i s s e e n i n t h eo p p o s i t e d i r e c t i o n

T h e

d i r e c t i o n a l f la g

i s n o t s e t

T h e e l e m e n t

d o e s n o t

m a l o p e r a t e

Industrial Systems


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Examples Internal Fault

T h e b u s d i f f e r e n t i a l

p r o t e c t i o n e l e m e n t

p i c k s u pT h e s a t u r a t i o n

f l a g i s n o t s e t - n o

d i r e c t i o n a l

d e c i s i o n r e q u i r e d

T h e e l e m e n t

o p e r a t e s i n

1 0 m s

A l l t h e f a u l t c u r r e n t s

a r e s e e n i n o n e

d i r e c t i o n

T h e

d i r e c t i o n a l

f l a g i s s e t

Industrial Systems


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User-Modified Tripping Logic

All the key logic flags (DIFferential, SATuration, DIRectional) are

available as FlexLogicTM operands with the following meanings:

BUS BIASED PKP - differential characteristic entered

BUS SAT - saturation (external fault) detected BUS DIR - directionality confirmed (internal

fault)

FlexLogicTM can be used to override the default 87B logic

Example: 2-out-of-2 operating principle with extra security applied

to the differential principle:

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Dynamic Bus Replica

Dynamic bus replica mechanism is provided by associating astatus signal with each current of a given differential zone

Each current can be inverted prior to configuring into a zone (tie-breaker with a single CT)

The status signal is a FlexLogicTM operand (totally user

programmable) The status signals are formed in FlexLogicTM including any

filtering or extra security checks from the positions of switchesand/or breakers as required

Bus replica applications:

Isolators Tie-Breakers

Breakers

Industrial Systems


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Dynamic Bus Replica - Isolators

Reliable Isolator Closed signal is composed

The Isolator Position signal:

Decides whether the associated current is to be included intodifferential calculations

Decides whether the associated breaker is to be tripped

For maximum safety:

Both normally open and normally closed contacts are used

Isolator alarm is established under discrepancy conditions

Isolator position to be sorted out under non-valid combinations ofthe auxiliary contacts (open-open, closed-closed)

Switching operations in the substation shall be inhibited until thebus image is recognized with 100% accuracy

Optionally the 87B may be inhibited from the isolator alarm

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Dynamic Bus Replica - Isolators

Isolator OpenAuxiliary

Contact

Isolator ClosedAuxiliary

Contact

IsolatorPosition

Alarm Block Switching

Off On CLOSED No No

Off Off LAST VALID After time delay

until

acknowledged

Until Isolator

Position is valid

On On CLOSED

On Off OPEN No No

ISOLATOR 1 OPEN

ISOLATOR 1 CLOSED

ISOLATOR 1 BLOCK

ISOLATOR 1 ALARM

ISOLATOR 1 RESET

ISOLATOR 1 POSITION

Isolator position valid(isolator opened)

Isolator position valid(isolator opened)

Isolator position invalid

alarm time

delay

blocking signal resets when

isolator position valid

alarm

acknowledged

alarm acknowledging

signal

Industrial Systems


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53

Dynamic Bus Replica Isolator Positions and Differential Protection

Phase A AC signals wired

here, bus replica configured

here

Phase B AC signals wired


here

Phase C AC signals wired


here

Up to 96 auxuliary switches

wired here; Isolator Monitoring

function configured here

Isolat

orPosition

IsolatorPosition

IsolatorPosition

Isolato

rPosi

tion

Industrial Systems


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Dynamic Bus Replica Tie-Breakers: Two-CT Configuration

Overlapping zones no blind spots

Both zones trip the Tie-Breaker

No special treatment of the TB required in terms of itsstatus for Dynamic Bus Replica (treat as regularbreaker see next section)

TBZ1 Z2

Industrial Systems


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Dynamic Bus Replica Tie-Breakers Tie-Breakers: Single-CT Configuration

Both zones trip the Tie-Breaker Blind spot between the TB and the CT

Fault between TB and CT is external to Z2

Z1: no special treatment of the TB required (treat asregular CB)

Z2: special treatment of the TB status required:

The CT must be excluded from calculations after the TBis opened

Z2 gets extended (opened entirely) onto the TB

TBZ1 Z2

Industrial Systems


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Tie-Breakers: Single-CT Configuration

Sequence of events:

Z1 trips and the TB gets opened

After a time delay the current from the CT shall beremoved from Z2 calculations

As a result Z2 gets extended up to the opened TB

The Fault becomes internal for Z2

Z2 trips finally clearing the fault

expand

Industrial Systems


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Dynamic Bus Replica Breakers: Bus-side CTs

Blind spot exists between the CB and CT

CB is going to be tripped by line protection

After the CB gets opened, the current shall be removed from differentialcalculations (expanding the differential zone up to the opened CB)

Relay configuration required: identical as for the Single-CT Tie-Breaker

CT

CB

Blind spot forbus protection

Industrial Systems


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Dynamic Bus Replica Breakers: Line-side CTs

Over-trip spot between the CB and CT when the CB is opened

When the CB gets opened, the current shall be removed from

differential calculations (contracting the differential zone up to theopened CB)

Relay configuration required: identical as for a Single-CT Tie-Breaker,

but.

CB

CT

Over-trip spot for

bus protection

Industrial Systems


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Dynamic Bus Replica Breakers: Line-side CTs

but.

A blind spot created by contracting the bus differential zone

End Fault Protection required B90 provides one EFP element per

current input

CB

CT

Blind spot for

bus protectionco

nt

rac

t

Industrial Systems


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End Fault Protection

SETTING

EFP 1 FUNCTION:

Disabled = 0

Enabled = 1

SETTING

EFP 1 CT:

Current Magnitude, |I|

FLEXLOGIC OPERANDS

EFP 1 OP

SETTING

B90 FUNCTION:

Logic = 0

Protection = 1

AND

SETTING

EFP 1 BLOCK:

Off = 0

EFP 1 DPO

EFP PKP

SETTINGS

EFP 1 BRK DELAY:

tPKP

0

SETTING

| I | > PICKUP

RU N

EFP 1 PICKUP:

SETTING

EFP 1 MANUAL CLOSE:

Off = 0

SETTING

EFP 1 BREAKER OPEN:

Off = 0

AND

SETTING

EFP 1 PICKUP DELAY:

tPKP

0

(1) The EFP gets armed

after the breaker is open

(2) Excessive current .

(3) Causes the EFP

to operate

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Breaker Failure Protection

BF Architecture:

Current supervision residing on protection IEDs

BFI signal can be generated internally (from protection IEDs)

or externally via communications or a digital input from any

IED BF logic and timers residing on the logic IED

Trip contacts distributed freely between various IEDs

BF Performance:

Reset time of current sensors below 0.7 power system cycle

Communications delays around 0.2 power system cycle

between any two neighboring IEDs

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Breaker Failure Protection Current Supervision


here, current status

monitored here



monitored here



monitored here

Up to 24 BF elements

configured here

Curre

ntSt

atus

CurrentStatus

CurrentStatus

Curre

ntStatu

s

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Breaker Failure Protection Initiate



monitored here



monitored here



monitored here

Up to 24 BF elements

configured here

BFInitia

te

BFInitiate

BFInitiate

BFIni

tiate

BFI

BFI

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Breaker Failure Protection Trip Action



monitored here



monitored here



monitored here

Trip command generated here

and send to trip appropraite

breakers

Trip

Comm

and

TripCommand

TripCommand

TripCo

mmand

Trip

Trip

TripTrip

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Programmable Logic (FlexLogicTM)

All B90 IEDs provide for programmable logic

Distributed logic over fiber-optic communications

(Direct I/Os)

Functions available: Gates

Edge detectors

Latches and non-volatile latches

Timers

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Disturbance Recording

All AC inputs automatically recorded

Programmable sampling rate: 8, 16, 32, 64 s/c

Programmable content (phasor magnitudes and angles,

differential, restraint currents, frequency, any digital flag)

Programmable number of records vs. record length Flexible treatment of old records (overwrite, preserve)

Programmable trigger

Programmable pre-/post-trigger windows

Individual (independent) oscillography configuration of each B90

IED

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Sequence of Events Recording

Up to 1040 events per each B90 IED

Events stamped with 1microsecond resolution

0.5 msec scanning rate for digital inputs

All B90 IEDs synchronized via IRIG-B or SNTP

All events (except hardware-related alarms) user programmable Events can be enabled independently for:

All protection elements

All digital inputs and contact outputs

Communications driven signals Individual (independent) SOE configuration of each B90 IED

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Substation one-line and

wiring diagrams

F4-Z2-IN

VO 23

F3-Z2-IN

VO 22

F2-Z2-IN

VO 21

F4-Z1-IN

VO 7

SWITCHING ON Z1 & Z2, Z1 & Z3 OR Z2 & Z3 BUSBARS

B

F3-Z1-IN

VO 6

F2-Z1-IN

VO 5

F1-Z1-IN&

Z2-OUT

VO 4

ISO 1

TRIP

PERM

Z1/Z2

VO 63

600

ISO 3

LATCH

ISO 6

ISO 9

0100

CLOSING ORDER

52b

F2-Z1-OUT

VO 53

F2-Z2-OUT

VO 54

B

A

A

ISO 3

A

ISO 1

ISO 2

ISO 4

ISO 7

ISO 2

ISO 5

ISO 8

F2-Z3-IN

VO 37

F3-Z3-IN

VO 38

F4-Z3-IN

VO 39

OPTION: ZONE 3 AS

TRANSFER BUS

LOGIC FOR COUPLER

ISO 2

ISO 3

ISO 1

ISO 3

ISO 2

ISO 6

ISO 5

ISO 9

ISO 8

ISO 6

ISO 4

ISO 9ISO 7

ISO 5

ISO 4

ISO 8

ISO 7

Logic design FlexLogicTM Implementation

Engineering the B90

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B90 Summary

Cost-efficient

Good performance

Modern communications capability

Member of the Universal Relay (UR) family

Easy integration with other URs

Common configuration tool for all B90 IEDs

Proven algorithms (B30) and hardware (UR)

Expandable

Two levels of scalability (modules and IEDs)

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Ordering the B90

The B90 can be ordered as an engineered product

The following order code applies to the engineered B90

B90 * * * * ** * * **

B90 Base system

S Single busbar

D Double busbar

T Double busbar with transfer

X Special arrangement

C Cabinet supply

F Frame supply

A RS485 + RS485 (ModBus RTU, DNP)

C RS485 + 10BaseF (MMS/UCA2, ModBus TCP/IP, DNP)

D RS485 + redundant 10BaseF (MMS/UCA2, ModBus, TCP/IP, DNP)

H 125/250, AC/DC

L 24-48V (DC only)

** Specify the number of lines + bus couplers (two digits)

0 Without Breaker Fail

B With Breaker Fail

0 Without End Fault Protection

E With End Fault Protection

00 Sequential number

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How to Order

International: +1 905 294 6222

Europe: +34 94 485 88 00

Email: [email protected]

b90 presentation

Documents