Industrial Systems Internal Version 1 B90 Bus Differential Relay and Breaker Failure Protection...
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Industrial Systems
Inte
rnal
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on
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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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NEW!
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 assignment of currents to multiple zones– expensive and dangerous when done externally on
secondary currents (analog way)– natural and safe when done “in software”
• Breaker Fail for re-configurable busbars is naturally integrated 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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Traditionally Two Distinctive Architectures are Offered
• Fits better new installations
• Perceived less reliable
• Slower
52
DAU
52
DAU
52
DAU
CU
copper
fiber
Distributed Bus Protection
52 52 52
CU
copper
Centralized Bus Protection
• Fits better retrofit installations
• Perceived more reliable
• Potentially faster
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iA, vA
New Architecture – Digital Phase-Segregated Busbar Scheme
• Foundation: – Single-phase IEDs for primary
differential protection– Separate IEDs for Breaker
Failure and extra I/Os– Inter-IED communications for
sharing digital states– Scalability and flexibility
Phase A Protection
TRIPA
iB, vBPhase B
ProtectionTRIPB
iC, vCPhase C
ProtectionTRIPC
Breaker Failure
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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 and
directional 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 output
contacts• Fast digital communications between the IEDs for
sharing digital states
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B90 Architecture
B90Phase A Protection
PS
UR #1
CP
U
CO
MM
S
DS
PI/
OD
SP
I/O
DS
PI/
O
phase A currents & voltages
fiber
, rin
g co
nfig
urat
ion
phase A trip contacts
PS
CP
U
UR #2 Phase B Protection
DS
PI/
OD
SP
I/O
DS
PI/
O
CO
MM
S
phase B currents & voltages
phase B trip contacts
PS
CP
U
UR #3 Phase C Protection
DS
PI/
OD
SP
I/O
DS
PI/
O
CO
MM
S
phase C currents & voltages
phase C trip contacts
PS
CP
U
UR #4 Bus Replica & Breaker FailI/
OI/
OI/
OI/
OI/
OI/
O
CO
MM
S
• No A/C data traffic• No need for sampling
synchronization, straightforward relay configuration - all A/C signals “local” to a chassis
• Data traffic reduced to I/Os• Direct I/Os (similar to existing
UR Remote I/Os) used for exchange of binary data
• Oscillography capabilities multiplied (available in each IED separately)
• Programmable logic (FlexLogic) capabilities multiplied
• SOE capabilities multiplied• Extra URs in a loop for more
I/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
wer S
up
ply
CP
U
DS
P 1
I/O
DS
P 2
I/O
DS
P 3
I/O
Co
mm
s
8 A
C s
ing
le-p
ha
se in
pu
ts
8 A
C s
ing
le-p
ha
se in
pu
ts
8 A
C s
ing
le-p
ha
se in
pu
ts
Oth
er
UR
-ba
sed
IE
Ds
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 and alarming)
Po
wer S
up
ply
CP
U
Oth
er
UR
-ba
sed
IE
Ds
I/O
I/O
I/O
I/O
I/O
I/O
Co
mm
s
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 between neighbouring 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 secure applications)
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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 optimized for 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 & BFfor less than 16feeders
Extended: BF for morethan 16 feeders
Full version: 24 Feederswith 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 24 ZONE 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
Po
wer S
up
ply
CP
U
DS
P 1
I/O
DS
P 2
I/O
DS
P 3
I/O
Sp
are
8 p
ha
se-A
cu
rre
nts
8 p
ha
se-B
cu
rre
nts
8 p
ha
se-C
cu
rre
nts
Diff
Zo
ne
1
Diff
Zo
ne
2
Diff
Zo
ne
3
One B90 IED with 3 zones could protect a single
8-circuit busbar!
One B90 IED with 3 zones could protect a single
8-circuit busbar!
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B90 and Small Single Busbars – 12-circuit busbar
Po
wer S
up
ply
CP
U
DS
P 1
I/O
DS
P 2
I/O
DS
P 3
I/O
Sp
are
8 p
ha
se-A
cu
rre
nts
4 p
ha
se-A
cu
rre
nts
8 p
ha
se-B
cu
rre
nts Two B90 IEDs with 2 zones
could protect a single 12-circuit busbar!
Two B90 IEDs with 2 zones could protect a single
12-circuit busbar!4
ph
ase
-B c
urr
en
ts
Po
wer S
up
ply
CP
U
DS
P 1
I/O
DS
P 2
I/O
Sp
are
Sp
are
Sp
are
8 p
ha
se-C
cu
rre
nts
4 p
ha
se-C
cu
rre
nts
Two levels of scalability allow flexible applicationsTwo levels of scalability allow flexible applications
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B90 and Small Single Busbars – 16-circuit busbar
Po
wer S
up
ply
CP
U
DS
P 1
I/O
DS
P 2
I/O
Sp
are
Sp
are
Sp
are
8 p
ha
se-A
cu
rre
nts
8 p
ha
se-A
cu
rre
nts
Po
wer S
up
ply
CP
U
DS
P 1
I/O
DS
P 2
I/O
Sp
are
Sp
are
Sp
are
8 p
ha
se-B
cu
rre
nts
8 p
ha
se-B
cu
rre
nts
Po
wer S
up
ply
CP
U
DS
P 1
I/O
DS
P 2
I/O
Sp
are
Sp
are
Sp
are
8 p
ha
se-C
cu
rre
nts
8 p
ha
se-C
cu
rre
nts
Three B90 single-zone IEDscould protect a single 16..24-circuit busbar!
Three B90 single-zone IEDscould protect a single 16..24-circuit busbar!
Two levels of scalability allow flexible applicationsTwo levels of scalability allow flexible applications
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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 on external fa
ults
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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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diffe
rent
ial
restraining
CT Saturation Problem
External fault: ideal CTs
t0 – fault inceptiont2 – fault conditions
t0
t2
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diffe
rent
ial
restraining
CT Saturation Problem
External fault: CT ratio mismatch
t0 – fault inceptiont2 – fault conditions
t0
t2
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diffe
rent
ial
restraining
CT Saturation Problem
External fault: CT saturation
t0 – fault inceptiont1 – CT saturation timet2 – CT saturated
t0
t1
t2
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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 namely phase directional (phase comparison) for better security
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Bus Differential Function – Block Diagram
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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
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“maximum of”
“geometrical average”
“scaled sum of”
“sum of”nR iiiii ...321
nR iiiin
i ...1
321
nR iiiiMaxi ,...,,, 321
nnR iiiii ...321
Various Definitions of the Restraining Signal
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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
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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 of
connected 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)
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Differential Function – Characteristic
diffe
rent
ial
restraining
LOWSLOPE
OPERATE
BLOCK
I R
|I D |
HIGHSLOPE
LOW
BPN
T
HIGH
BPN
T
PICKUP
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Differential Function – Adaptive Approach
diffe
rent
ial
restraining
Region 1(low differential
currents)
Region 2(high differential
currents)
• 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
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Adaptive Logic
DIF1
DIR
SAT
DIF2
OR
AN
D
OR TRIP
AN
D
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Adaptive Approach
diffe
rent
ial
restraining
Region 1(low differential
currents)
Region 2(high differential
currents)
Dynamic 2-out-of-2,1-out-of-2 operating
mode
2-out-of-2operating
mode
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Directional Principle
DIF1
DIR
SAT
DIF2
OR
AN
D
OR TRIP
AN
D
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Directional Principle
• Voltage signal is not required• Internal faults:
– all fault (“large”) currents approximately in phase
• External faults:– one current approximately out of phase
Secondary current ofthe faulted circuit
(deep CT saturation)
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Directional Principle
• Implementation:– step 1: select fault “contributors”
• A “contributor”is a circuit carrying significant amount of current• A circuit is a contributor if its current is above higher break
point• A circuit is a contributor if its current is above a certain portion
of the restraining current– step 2: check angle between each contributor and the sum of all
the other currents• Sum of all the other currents is the inverted contributor if the
fault 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 is
physically impossible
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External Fault
BLOCK
OPERATE
BLOCK
pD
p
II
Ireal
pD
p
II
Iimag
Ip
ID - I p
External Fault Conditions
OPERATE
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Internal Fault
BLOCK
BLOCK
pD
p
II
Ireal
pD
p
II
Iimag
Ip
ID - I p
Internal Fault Conditions
OPERATE
OPERATE
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Saturation Detector
DIF1
DIR
SAT
DIF2
OR
AN
D
OR TRIP
AN
D
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diffe
rent
ial
restraining
Saturation Detector
t0
t1
t2
t0 fault inceptiont1 CT starts to saturatet2 external fault under
heavy CT saturationconditions
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Saturation Detector – The State Machine
NORMAL
SAT := 0
EXTERNAL
FAULT
SAT := 1
EXTERNALFAULT & CT
SATURATION
SAT := 1
The differentialcharacteristic
entered
The differential-restraining trajectoryout of the differential
characteristic forcertain period of time
saturationcondition
The differentialcurrent below thefirst slope forcertain period oftime
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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 faults
whether 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
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Examples – External Fault
0.06 0.07 0.08 0.09 0.1 0.11 0.12-200
-150
-100
-50
0
50
100
150
200
time, sec
curr
en
t, A
~1 ms
The bus differentialprotection elementpicks up due to heavyCT saturation
The CT saturation flagis set safely before thepickup flag
Despite heavy CTsaturation theexternal fault currentis seen in theopposite direction
Thedirectional flagis not set
The elementdoes notmaloperate
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Examples – Internal Fault
The bus differentialprotection elementpicks up
The saturationflag is not set - nodirectionaldecision required
The elementoperates in10ms
All the fault currentsare seen in one
direction
Thedirectionalflag is set
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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 a status 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 switches and/or breakers as required
• Bus replica applications:– Isolators– Tie-Breakers– Breakers
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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 into differential 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
of the auxiliary contacts (open-open, closed-closed)– Switching operations in the substation shall be inhibited until
the bus 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 Open Auxiliary Contact
Isolator Closed Auxiliary Contact
Isolator Position
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 timedelay
blocking signal resets whenisolator position valid
alarmacknowledged
alarm acknowledgingsignal
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Dynamic Bus Replica – Isolator Positions and Differential Protection
Phase A AC signals wired here, bus replica configured here
Phase B AC signals wired here, bus replica configured here
Phase C AC signals wired here, bus replica configured
here
Up to 96 auxuliary switches wired here; Isolator Monitoring function configured here
Isolator P
osition
Isolator Position
Isolator Position
Isolator Positio
n
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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 its
status for Dynamic Bus Replica (treat as regular breaker – see next section)
TBZ1 Z2
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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 as
regular CB)• Z2: special treatment of the TB status required:
– The CT must be excluded from calculations after the TB is opened
– Z2 gets extended (opened entirely) onto the TB
TBZ1 Z2
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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 be
removed 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
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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
differential calculations (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
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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 the opened CB)
• Relay configuration required: identical as for a Single-CT Tie-Breaker, but….
CB
CT
“Over-trip” spot forbus protection
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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 forbus protectioncon
tract
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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
AN
D
SETTING
EFP 1 BLOCK:
Off = 0
EFP 1 DPO
EFP PKP
SETTINGS
EFP 1 BRK DELAY:
tPKP
0
SETTING
| I | > PICKUP
RUN
EFP 1 PICKUP:
SETTING
EFP 1 MANUAL CLOSE:
Off = 0
SETTING
EFP 1 BREAKER OPEN:
Off = 0
AN
D
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
Phase A AC signals wired here, current status monitored here
Phase B AC signals wired here, current status monitored here
Phase C AC signals wired here, current status
monitored here
Up to 24 BF elements configured here
Current S
tatus
Current Status
Current Status
Current Status
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Breaker Failure Protection – Initiate
Phase A AC signals wired here, current status monitored here
Phase B AC signals wired here, current status monitored here
Phase C AC signals wired here, current status
monitored here
Up to 24 BF elements configured here
BF Initia
te
BF Initiate
BF Initiate
BF Initiate
BFI
BFI
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Breaker Failure Protection – Trip Action
Phase A AC signals wired here, current status monitored here
Phase B AC signals wired here, current status monitored here
Phase C AC signals wired here, current status
monitored here
Trip command generated here and send to trip appropraite breakers
Trip C
ommand
Trip Command
Trip Command
Trip Command
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 andwiring diagrams
F4-Z2-INVO 23
F3-Z2-INVO 22
F2-Z2-INVO 21
F4-Z1-INVO 7
SWITCHING ON Z1 & Z2, Z1 & Z3 OR Z2 & Z3 BUSBARS
B
F3-Z1-INVO 6
F2-Z1-INVO 5
F1-Z1-IN& Z2-OUTVO 4
ISO 1
TRIP PERM Z1/Z2 VO 63
600
ISO 3
LATCH
ISO 6
ISO 9
0100
CLOSING ORDER
52b
F2-Z1-OUTVO 53
F2-Z2-OUTVO 54
B
A
AISO 3
A
ISO 1ISO 2
ISO 4
ISO 7
ISO 2
ISO 5
ISO 8
F2-Z3-INVO 37
F3-Z3-INVO 38
F4-Z3-INVO 39
OPTION: ZONE 3 ASTRANSFER 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 9
ISO 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]• Web:
http://www.GEindustrial.com/pm