presentation p631+p632+p633+p634
TRANSCRIPT
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MiCOM P631…634Transformer Differential Protection
October 2005
Rudolf SimonDr.-Ing.
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+3 3
MiCOM P631…634Transformer Differential Protection
Applications
Two Winding Transformers
Unit TransformersThree Winding Transformers
Reactors
Generators
Ring Bus Fed Windings
Auto Transformers
Motors
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+4 4
ANSI No. P631 P632 P633 P634
Differential protection 87 2 wind. 2 wind. 3 wind. 4 wind.
Restricted earth fault prot. 87G – 2 3 3
Definite-time O/C protection 50 2 2 3 3
Inverse-time O/C protection 51 2 2 3 3
Thermal overload protection 49 1 1 2 2
Over/undervoltage protection 27, 59 – 1 1 1
Over/underfrequency prot. 81 – 1 1 1
Overexcitation protection 24 – 1 1 1
Current transformer monitor. option option option option
Measuring circuit monitoring 2 2 3 4
CB Failure Protection 50BF 2 2 3 4
Limit value monitoring 2 2 3 3
Programmable logic 1 1 1 1
MiCOM P631…634Transformer Differential Protection
Main Functions
P630C is functionally equivalent to P631.
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+5 5
MiCOM P631…634Transformer Differential Protection
Inputs and Outputs
P631 P632 P633 P634
Measuring inputs
Phase currents 2 x 3 2 x 3 3 x 3 4 x 3
Residual current or star-point current – 2 3 3
Voltage – 1 1 1
Binary inputs and outputs
Optical coupler inputs (per order) 4 4 to 10 4 to 16 4 to 10
Add. optical coupler inputs (optional) – 24 24 24
Output relays (per order) 8 to 14 8 to 22 8 to 30 8 to 22
Analogue inputs and outputs (optional)
0 to 20 mA input – 1 1 1
PT 100 input – 1 1 1
0 to 20 mA outputs – 2 2 2
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+6 6
MiCOM P631…634Transformer Differential Protection
Screw Terminals for Pin Lugs
Screw Terminals for Ring Lugs
Models
GGC
GG
G
G
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
GGC
GG
G
G
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
GGC
GG
G
G
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
GGC
GG
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
G
G
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
GGC
GG
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
G
G
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
GGC
GG
G
G
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
GGC
GG
G
G
G
TR IP
ALAR M
O U T O F SER VIC E
H EALTH Y
ED IT
= C LEAR
= EN TER
= R EAD
C
MiCOM
GGC
GG
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
G
G
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
P631
GGC
GG
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
G
G
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
P632 P633 P634
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+7 7
Functional Details
MiCOM P631…634Transformer Differential Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+8 8
MiCOM P631…634Functional Details
DIFF
Differential Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+9 9
MiCOM P631…634Differential Protection
Main Features
GGC
GG
G
TR IP
ALAR M
O U T O F SER VIC E
H EALTH Y
G
G
ED IT
= C LEAR
= EN TER
= R EAD
C
MiCOM
GGC
GG
G
G
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
GGC
GG
G
G
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
P631 P632 P633 P634
GGC
GG
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
G
G
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
GGC
GG
G
TR IP
A LA R M
O U T O F S E R V IC E
H E A LTH Y
G
G
E D IT
= C LE A R
= E N TE R
= R E A D
C
MiCOM
3-system differential protection for transformers, generators and motors 2, 3 or 4 bias inputs per phase Amplitude and vector group matching Zero sequence current filtering for each winding Triple-slope tripping characteristic Unrestrained instanteneous differential element Magnetizing inrush stabilization (second harmonic), with/without cross-blocking Overflux blocking (fifth harmonic) Through-fault stability with c.t. saturation detection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+10 10
MiCOM P631…634Differential Protection
Amplitude Matching
A
B
CW ind ing a
Inom, C T, prim , a V nom, prim , a V nom, prim , b
Sref, prim = Snom, prim , max
Inom, C T, prim , b
A
B
C
W ind ing b
All you have to do: Simply set these nominal values!
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+11 11
MiCOM P631…634Differential Protection
Vector Group Matching
A
B
CW inding a
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11
A
B
C
W inding b
All you have to do: Simply set the vector group ID!
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+12 12
MiCOM P631…634Differential Protection
Zero Sequence Current Filtering
A
B
C
W inding a
w ith I0 filtering w ithout I0 filtering
A
B
C
W inding b
All you have to do: Simply set ‘with‘ or ‘without‘!
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+13 13
MiCOM P631…634Differential Protection
Tripping Characteristic
Basic threshould value Id>, slope m1, second knee point IR,m2 and slope m2 are settable.
1 2 3 4
1
2
0
Id
IR
Load linefor s ing le-end in feed
Id>
m 1
m 2
IR ,m 2
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+14 14
REF_1 REF_2 REF_3
MiCOM P631…634Functional Details
Restricted Earth Fault Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+15 15
MiCOM P631…634Restricted Earth Fault Protection
DIFF REF: In-Zone Fault on Transformer Yyn(d)
A
B
C
{IA, IB, IC}
A
B
C
N a Nb
0 ... f ... 1
Id,G>IY
Ix,aId>
Ix,b
: 1N
N withand
IfN
Nf
3
2=I
N
Nf
3
2=I
b
a
maxG,a
bY
a
baA,
maxG,YG,d If=I=I maxG,
2aA,d If
3
2=II
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+16 16
1
f0
0.2 0.55
0.2
0.660.57
Id,G/IG,max
Id/IG,max
0.59 10
MiCOM P631…634Restricted Earth Fault Protection
DIFF REF: Comparison of Sensitivity
maxG,G,d If=I
maxG,2
d If3
1I
maxG,2
d If3
2I
The advantage of ground differential protection resides in the linear dependency of the sensitivity on fault location.
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+17 17
MiCOM P631…634Restricted Earth Fault Protection
Operating Modes
Low impedance principle:
Biasing by residual current
Low impedance principle:
Biasing by maximum phase current
High impedance principle
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+18 18
MiCOM P631…634Restricted Earth Fault Protection
Tripping Characteristic: Biasing by Residual Current
Id,G>
Id,G /Iref
m = 1.005
1 1.5 20.5
0.5
1
1.5
IR ,G /Iref
C haracteristic forline side feed only (IY=0)
2
Definition of Id,G and IR,G:
CBAP,ampG,R
YY,ampCBAP,ampG,d
I,I,IkI
IkI,I,IkI
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+19 19
MiCOM P631…634Restricted Earth Fault Protection
Tripping Characteristic: Biasing by Maximum Phase Current
Id,G>
Id,G /Iref
m 2
1 1.5 20.5
0.5
1
1.5
IR ,G /Iref
2
m 1
IR ,G ,m 2
C haracteristic forline side feed only (IY=0)
Definition of Id,G and IR,G:
YY,ampCBAP,ampG,R
YY,ampCBAP,ampG,d
IkI,I,Imaxk2
1I
IkI,I,IkI
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+20 20
MiCOM P631…634Restricted Earth Fault Protection
High Impedance Principle
A
B
C
R L,PR L,P
R C T ,P
R L,Y
R L,Y
R stab
R C T ,Y
saturated C T
Id,G>
Voltage across the stabilizing resistor: P,LP,CTmax,ext,scmax,ext,sc R2RIV
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+21 21
0
0,005
0,01
0,015
0,02
0,025
0,03
0,035
0,04
0,045
0 5 10 15 20
Vknee/Vstab
t/[s]
MiCOM P631…634Restricted Earth Fault Protection
High Impedance: Operating Time
Ratio Vknee/Vstab > 2 ensures tripping times of less than 2 cycles.
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+22 22
MiCOM P631…634Functional Details
DTOC1 DTOC2 DTOC3
Definite-Time Overcurrent Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+23 23
Definite-time overcurrent protection, three-stage, phase-selective Each function group (DTOC1, DTOC2, DTOC3) is freely assignable
to a winding Virtual winding may be defined for summation of currents from two real
windings (two breakers in a ring bus or breaker-and-a-half configuration) 3 separate measuring systems for
phase currents, negative-sequence current and residual current
All 3 measuring systems operate independently of each other: Operate value of the stage may be set as a dynamic parameter Settable operate delay per stage Sequence of all operate delays can be blocked
– through appropriately configured binary signal inputs or
– per selection matrix via a binary signal input or
– per programmable logic (LOGIC)
MiCOM P631…634Definite-Time O/C Protection
Main Features
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+24 24
MiCOM P631…634Functional Details
IDMT1 IDMT2 IDMT3
Inverse-Time Overcurrent Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+25 25
Inverse-time overcurrent protection, single-stage, phase-selective Each function group (IDMT1, IDMT2, IDMT3) is freely assignable
to a winding Virtual winding may be defined for summation of currents from two real
windings (two breakers in a ring bus or breaker-and-a-half configuration) 3 separate measuring systems for phase currents, negative-sequence
current and residual current
All 3 measuring systems operate independently of each other: Operate value of the stage may be set as a dynamic parameter Choice of 12 different tripping time characteristics Accumulation of intermittend startings by means of a hold-time logic Sequence of all operate delays can be blocked
– through appropriately configured binary signal inputs or
– per selection matrix via a binary signal input or
– per programmable logic (LOGIC)
MiCOM P631…634Inverse-Time O/C Protection
Main Features
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+26 26
1
10
1 10 100I/Iref
t/[s]
0,1
1
10
100
1 10 100I/Iref
t/[s]
MiCOM P631…634Inverse-Time O/C Protection
Tripping Characteristics acc. to IEC and ASEA
NI
LTI
VI
EI
RI
RXIDG
NI: Normally inverseVI: Very inverseEI: Extremely inverseLTI: Long time inverse
RI: RI-type inverseRXIDG: RXIDG-type inverse
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+27 27
0,1
1
10
100
0,1 1 10 100I/Iref
t/[s]
0,01
0,1
1
10
100
0,1 1 10 100I/Iref
t/[s]
MiCOM P631…634Inverse-Time O/C Protection
Tripping Characteristics acc. to ANSI/IEEE
EI
VI
MI
EI
VI
MI
LTI
NI
STI
LTI
NI
STI
MI: Moderately inverseVI: Very inverseEI: Extremely inverse
NI: Normally inverseSTI: Short time inverseLTI: Long time inverse
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+28 28
MiCOM P631…634Functional Details
THRM1 THRM2
Thermal Overload Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+29 29
MiCOM P631…634Thermal Overload Protection
First-Order Model Based on IEC 60255-8
a
I2
(t)
ka
wThermal
conductance
Specificthermal capacity
Square of current
Protected objectTemperature (t)
CoolantTemperature a
Proportionalityfactor
In thermal overload protection based on IEC 60255-8, a simple homogeneous two-body model
(protected object and coolant) is considered.
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+30 30
MiCOM P631…634Thermal Overload Protection
Model Equation
t
(t)
a
0
aa2I
k
a Ultimate temperature
Ultimate temperature rise
Transition from the initial temperatur 0 to the final temperatur (ultimate temperatur)
based on the rise time constant at constant current I.
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+31 31
MiCOM P631…634Thermal Overload Protection
Consideration of the Coolant Temperature
max,amax
max,aatrip
t
0
2
ref0 e1
I
It
tI offset
The offset offset corrects the state of the thermal replica for the normal case in which the actual coolant
temperature a is not equal to the maximum coolant temperature a,max.
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+32 32
MiCOM P631…634Thermal Overload Protection
Graphic Representation of the Offset
trip
offset
100 %
0 %a,m ax m ax a
The offset offset disappears at a = a,max .
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+33 33
MiCOM P631…634Functional Details
V<>
Over-/Undervoltage Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+34 34
Definite-time overvoltage protection, two-stage
Definite-time undervoltage protection, two-stage:
– Transient signals are provided to be included in trip command
– Window function is provided for each timer stage
Reset ratio (hysteresis) settable
Sequence of all operate delays can be blocked
– through appropriately configured binary signal inputs or
– per selection matrix via a binary signal input or
– per programmable logic (LOGIC)
MiCOM P631…634Over-/Undervoltage Protection
Main Features
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+35 35
MiCOM P631…634Functional Details
f<>
Over-/Underfrequency Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+36 36
Over-/underfrequncy protection, four-stage
All four stages operate independently of each other: Operation modes:
– Over-/underfrequency monitoring
– Over-/underfrequency monitoring in conjunction with differential frequency gradient monitoring (df/dt) for system decoupling applications
– Over-/underfrequency monitoring in conjunction with average frequency gradient monitoring (f/t) for load shedding applications
Settable operate delay Sequence of all operate delays can be blocked
– through appropriately configured binary signal inputs or
– per selection matrix via a binary signal input or
– per programmable logic (LOGIC)
MiCOM P631…634Over-/Underfrequency Protection
Main Features
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+37 37
f
fx
fnomt
tx
MiCOM P631…634Over-/Underfrequency Protection
Time Delayed Over-/Underfrequeny
Start
Trip
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+38 38
f
fx
fnomt
tx
dfx/d t
MiCOM P631…634Over-/Underfrequency Protection
Time Delayed ROCOF
Trip
Start
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+39 39
f
fx
fnomt
fx
tx
MiCOM P631…634Over-/Underfrequency Protection
Average ROCOF
Trip
Start
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+40 40
MiCOM P631…634Functional Details
V/f
Overexcitation Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+41 41
V/f ratio based measurement
Alarm stage V/f> with definite time delay
Trip stage V/f>> with inverse time characteristic
– Characteristic defined by 12 settable value pairs
– Cooling time of thermal replica settable
Trip stage V/f>>> with definite time delay
Sequence of all operate delays can be blocked
– through appropriately configured binary signal inputs or
– per selection matrix via a binary signal input or
– per programmable logic (LOGIC)
MiCOM P631…634Overexcitation Protection
Main Features
Reset ratio 0,98
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+42 42
MiCOM P631…634Overexcitation Protection
Tripping Characteristic
...
V /f
t
1.00 1.10 1.20 1.30 1.40 1.50 1.60
V nom /fnom
1
10
100
V/f>>>
V/f>>
...
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+43 43
MiCOM P631…634Functional Details
CBF
CB Failure Protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+44 44
MiCOM P631…634CB Failure Protection
Overview
Common Px3x platform function – see platform presentation for more details!
Monitoring of settable undercurrent condition, phase-selective 2 timer stages to allow retripping and backup-tripping Independent trip commands, incl. lock-out function Additional monitoring of CB aux. contacts (52a, 52b) as CB fail criterion
in case of „trip w/o current“ Plausibility check of CB position signals Pole Discrepancy Supervision „Starting triggering“ to provide back-up protection
in case of downstream CB failure condition Stub bus / end-zone protection
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+45 45
MiCOM P631…634Functional Details
CTS
CT Supervision
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+46 46
MiCOM P631…634CT Supervision
A Universal CTS function
suitable for ALL MiCOM Devices
Universal scheme suitable for all differential devices
Suitable for implementation on any MiCOM relay
No reference to VT ’s required
Suitable for blocking or indications as required by the user
Requirements
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+47 47
Ratio of Negative to Positive sequence current is measured at each CT set
If ratio is zero (or small) either unloaded, balanced load, three phase fault or three phase CT problem
If ratio is non-zero, either asymmetric fault or CT problem
Ratio calculated at all CT ends
If ratio is non-zero at two (or more ends) simultaneously, it is almost certainly a genuine fault condition & unlikely to be a CT problem
MiCOM P631…634CT Supervision
Principles (1)
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+48 48
Ratio of Negative to Positive sequence current cannot distinguish between genuine faults and CT problems
Additional criteria is positive sequence (load) current, I1
Better detection criteria than phase currents
Considering a situation where the ratio is non-zero at one end only
If I1 only detected at one end, system is unloaded and therefore calculated non-zero ratio is due to a single-end fed fault or inrush condition
If I1 detected at two (or more) ends, this is a CT problem or sympathetic inrush on parallel transformers
MiCOM P631…634CT Supervision
Principles (2)
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+49 49
> 2
&
> 1
> 1
= 1
=(N-1)
CTS: Operated
DIFF: Any blocking
CTS: Blocking EXT
MAIN: Gen. trip signal
I2/I1 end a
> I1> (e.g. 10%)
I1 end aI1 end bI1 end cI1 end d
< I2/I1> (e.g. 5%)
I2/I1 end b
I2/I1 end c
I2/I1 end d
> I2/I1>> (e.g. 40%)
> 1
> 1
&CTS: End a flt.
MiCOM P631…634CT Supervision
Operating condition
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+50 50
CTS: Operated (updating)
CTS: Idiff>(CTS) activ.
CTS: Operated (latched)
> 1
S
R
Q
t Alarm 0
CTS: Operated
MAIN: General Reset
CTS: Reset latching> 1
CTS: Alarm end a (updat.)
CTS: Alarm end a
CTS: Alarm end a (latch.)
CTS: End a flt.
overall signals
per end signals
t Latch 0
> 1
S
R
Q
t Alarm 0
t Latch 0
MiCOM P631…634CT Supervision
Signaling
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+51 51
CTS impact on DIFF depends on setting:
Alarm Mode: Idiff> (CTS) = Idiff> (= Indication only)
Restrain Mode: Idiff> (CTS) > max. phase load current
Blocking Mode: Idiff> (CTS) Idiff>>
MiCOM P631…634CT Supervision
Characteristic shift
1 2 3
1
0
Idiff
IR
Load linefor single side infeed
Idiff>
IR,m2
m1
m2
Idiff>(CTS)
2
No Trip
Trip
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MiCOM P631…634Functional Details
MCM_1
Measuring Circuit Monitoring
MCM_4MCM_3
MCM_2
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+53 53
Sequence current ratio based measurement per end
Alarm or Trip stage I2/I1> with definite time delay
Function too slow for blocking DIFF CTS required for this application
Function can be used as ‘Broken Conductor’ protection
Function can be blocked
– through appropriately configured binary signal inputs or
– per selection matrix via a binary signal input or
– per programmable logic (LOGIC)
MiCOM P631…634Measuring Circuit Monitoring
Main Features
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MiCOM P631…634Functional Details
LIMIT
Limit Value Monitoring
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+55 55
MiCOM P631…634Limit Value Monitoring
Functionality
0 1
t>>
0 1
t>>>>
0 1
t<<
0 1
t<<<<
Measurands:
Phase currentsTemperature20 mA DC curr. ...
Signals:
Starting >t> elapsed ...
Intended to use for monitoring applications only!
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+56 56
MiCOM P631…634Functional Details
LOGIC
Programmable Logic
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MiCOM P631…634Programmable Logic
Embedding of Programmable Logic
Configuration:
INPLOCPC
COMM1COMM2
Fixed Logic:
DIST, IDMT, DIFF, ...Configuration:
OUTPLEDLOCPC
COMM1COMM2
Control Inputs
Trip and Signals
Functions
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> MiCOM P630C/P631...634 Transformer Differential Protection - March 2004 - P63x Presentation EN f+58 58
MiCOM P631…634Programmable Logic
Embedding of Programmable Logic
Programmable Logic:
LOGIC
Configuration:
INPLOCPC
COMM1COMM2
Fixed Logic:
DIST, IDMT, DIFF, ...Configuration:
OUTPLEDLOCPC
COMM1COMM2
Control Inputs
Trip and Signals
Functions
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