b90 Presentation
Transcript of 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
could protect a single
8-circuit busbar!
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B90 and Small Single Busbars 12-circuit busbar
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
could protect a single
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
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
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!
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
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
r e s t r a i n i n g
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)
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Differential Function Characteristic
differential
r e s t r a i n i n g
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
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Differential Function Adaptive Approach
differential
r e s t r a i n i n g
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
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Adaptive Logic
DIF1
DIR
SAT
DIF2
OR
AND
O
RTRIP
AND
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Adaptive Approach
differential
r e s t r a i n i n g
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
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Directional Principle
DIF1
DIR
SAT
DIF2
OR
AND
O
RTRIP
AND
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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 of
the faulted circuit
(deep CT saturation)
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Directional Principle
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
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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
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Saturation Detector
DIF1
DIR
SAT
DIF2
OR
AND
O
RTRIP
AND
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differential
r e s t r a i n i n g
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
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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
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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
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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
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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
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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
Isolat
orPosition
IsolatorPosition
IsolatorPosition
Isolato
rPosi
tion
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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
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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
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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
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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
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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
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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
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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
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
Curre
ntSt
atus
CurrentStatus
CurrentStatus
Curre
ntStatu
s
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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
BFInitia
te
BFInitiate
BFInitiate
BFIni
tiate
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
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]