cvpl transformer setting
TRANSCRIPT
EXCEL POWER SWITCHGEAR
NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL
CHENNAI - 600 032. Date: 22/01/2011
11KV / 6.9KV, 10MVA TRANSFORMER DIFFERENTIAL PROTECTION
:0.2
: 0.2Iref
RECOMMENDED SETTINGS FOR DIFFERENTIAL PROTECTION:
m1
TRANSFORMER DETAILS
LV SIDE CT RATIO
% IMPEDANCE
VECTOR GROUP
TAP CHANGER
POWER
HV SIDE VOLTAGE
HV SIDE CT RATIO
LV SIDE VOLTAGE
: 11KV
: 10MVA
: DYN11
: +5% T0 -5%
: 1000/1A
TRANSFOMER DIFFERENTIAL PROTECTION
AREVA MICOM P632
: 8.35%
: 6.9KV
: 600/1A
Idiff >
THE TRANSFORMER DIFFERENTIAL PROTECTION RELAY MICOM P632 HAS THE
FOLLOWING PARAMETER FOR SETTING
1. PICK UP VALUE OF DIFFERENTIAL CURRENT Idiff > ( OPERATE VALUE OF THE
DIFFERENTIAL PROTECTION FUNCTION AS REFERRED TO THE REFERENCE CURRENT OF
THE RELEVANCE TRANSFORMER END )
2. SLOPE 1 OF TRIPPING CHARACTERISTICS, m1 ( GRADIENT OF THE TRIPPING
CHARACTERISTICS OF DIFFERENTIAL PROTECTION IN THE RANGE )
3. SLOPE 2 OF TRIPPING CHARACTERISTICS, m2 ( GRADIENT OF THE TRIPPING
CHARACTERISTICS OF DIFFERENTIAL PROTECTION IN THE RANGE )
4. BASE POINT FOR SLOPE 2 CHARACTERISTICS, IR, m2 ( THIS SETTING DEFINES THE
SECOND KNEEOF THE TRIPPING CHARACTERISTICS ABOVE THE KNEE, THIS GRADIENT IS
m2 )
5. THRESHOLD VALUE OF THE DIFFERENTIAL CURRENT FOR THE DEACTIVATION OF THE
INRUSH STABILIZATION FUNCTION ( HARMONIC RESTRAINT ) AND OF THE OVER FLUXING
RESTRAINT, Idiff>>. ( IF THE THRESHOLD IS SET TOO HIGH, IT IS POSSIBLE FOR THE P632
6. THRESHOLD VALUE OF THE DIFFERENTIAL CURRENT FOR TRIPPING BY THE
DIFFERENTIAL CURRENT FOR TRIPPING BY THE DIFFERENTIAL PROTECTION FUNCTION
INDEPENDENT OF RESTRAINING VARIABLES, HARMONIC RESTRAINT, OVER FLUXING
m2
Idiff>>
Idiff>>> :10.0Iref
:8.0Iref
:1.5IrefIR, m2
:0.8
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E-Mail - [email protected] [email protected]
PHONE: 044-22251440, 22254870. Page 1 of 6
EXCEL POWER SWITCHGEAR
NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL
CHENNAI - 600 032. Date: 22/01/2011
= 1.0488-1
=0.0488AHENCE THE DIFFERENTIAL CURRENT
BIAS CURRENT=(I1 + I2)/2
=(1.0488+1)/2
=1.0244A
=0.920
=0.920*1.14
=1.0488A
WITH THE RATIO CORRECTION THE CURRENT AT THE
RELAY BIAS TERMINAL
= 10MVA/(1.732*10.45KV)
= 552.5AFULL LOAD PRIMARY CURRENT
(WILL BE CALCULATED BY THE RELAY)
AT -5% TAP CONDITION CURRENT IN HV BIAS CIRCUIT (WINDING a )
-5% OF 11KV = 10.45KV
= 0.83676AEQUIVALENT CURRENT IN CT SECONDARY
(WILL BE CALCULATED BY THE RELAY)
REQUIRED RATIO COMPENSATION =1.195
=1/ 0.83676A
FULL LOAD PRIMARY CURRENT = 10MVA/ (1.732 * 6.9KV)
= 836.76A
= 836.76A*1/1000
AT NORMAL CONDITION CURRENT IN LV BIAS CIRCUIT ( WINDING b )
(1.14 WILL BE CALCULATED BY THE RELAY)
EQUIVALENT CURRENT IN CT SECONDARY (600/1A)
( 0.874A WILL BE CALCULATED BY THE RELAY)
REQUIRED RATIO COMPENSATION
= 524.88/600=0.874A
= 1/0.874=1.14
AT NORMAL CONDITION CURRENT IN HV BIAS CIRCUIT ( WINDING a )
FULL LOAD PRIMARY CURRENT = 10MVA/ (1.732 * 11KV)
= 524.88A
CALCULATION TO VERIFY THE BIAS SETTINGS:
OPERATING CURRENT OF THE RELAY WILL BE
= 0.2+(0.2*1.0244)
=0.4048A( BIAS SETTING m1=0.2)
=Is+(BIAS SETTING m1 * BIAS
CURRENT)
EQUIVALENT CURRENT IN CT SECONDARY
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E-Mail - [email protected] [email protected]
PHONE: 044-22251440, 22254870. Page 2 of 6
EXCEL POWER SWITCHGEAR
NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL
CHENNAI - 600 032. Date: 22/01/2011
=0.2+(0.2*0.9748)
=0.39496A
OPERATING CURRENT OF THE RELAY WIL BE
=0.9748A
= 0.833AEQUIVALENT CURRENT IN CT SECONDARY
=0.833*1.14
= 0.9496A
HENCE BIAS SETTING OF m1 =20%
BIAS SETTING OF m2
DIFFERENTIAL CURRENTAT WORST TAP CONDITION =0.0504A
THIS IS LESS THAN 12% OF OPERATING CURRENT
HENCE BIAS SETTINGS OF
(5% OF 11KV = 11.55KV) = 499.88A
= 10MVA/(1.732*11.55KV)
m1 = 20% (TILL 1.5 TIMES OF FULL LOAD CURRENT)
m2 = 80% (FOR THROUGH FAULT STABILITY)
AT 5% TAP CONDITION CURRENT IN HV BIAS CIRCUIT (WINDING a)
FULL LOAD PRIMARY CURRENT
WITH RATIO CORRECTION THE CURENT AT THE RELAY BIAS
TERMNAL(I1)
=Is+(BIAS SETTING m1 * BIAS
CURRENT)
DIFFERENTIAL CURRENT AT WORST TAP SET =0.0488A
=0.4048AOPERATING CURRENT AT WORST TAP SET
DIFFERENTIAL CURRENT AT WORST TAP CONDITION SHOULD NOT BE MORE THAN 90% OF
OPERATING CURRENT FOR BETTER STABILITY
=80% FOR THROUGH FAULT
STABILITY
=0.39496AOPERATING CURRENT AT WORST TAP
THIS IS LESS THAN 7% OF OPERATING CURRENT
DIFFERENTIAL CURRENT AT WORST TAP CONDITION SHOULD NOT BE MORE THAN 90% OF
THE OPERATING CURRENT FOR BETTER STABILITY
= 1-0.9496
= 0.0504AHENCE THE DIFFERENTIAL CURRENT
BIAS CURRENT=(I1+I2)/2
=(0.9496+1)/2
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E-Mail - [email protected] [email protected]
PHONE: 044-22251440, 22254870. Page 3 of 6
EXCEL POWER SWITCHGEAR
NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL
CHENNAI - 600 032. Date: 22/01/2011
GROUP
MAIN
MAIN
MAIN
MAIN
MAIN
MAIN
MAIN
MAIN
MAIN
GROUP
MAIN
MAIN
MAIN
GROUP
MAIN
MAIN
GROUP
DIFF
GROUP
DIFF
DIFF
GROUP
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
DIFF
GROUP
REF_1
CONFIGURATION IN P632 RELAY
ADDRESS DESCRIPTION ACTIVE VALUE
/PARAMETER/FUNCTION PARAMETERS/GLOBAL/MAIN
OO3.O3O YES(=ON)DEVICE ONLINE
O72.158 O -SEQ FILT.b en YES
O10.O3O 50HZNOMINAL FREQUENCY fnom
O72.156 O -SEQ FILT.a en YES
O10.O49 A-B-CPHASE SEQUENCE
O72.155 RUSH I (2fo/IfO) 20%
O19.O2O 600AInom CT PRIM, END a
O72.159 OP.MODE RUSH RST NOT PHASE SELECTIVE
O19.O21 1000AInom CT PRIM, END b
O72.148 IR, m2 4.0Iref
Vnom VT PRIM
O72.147 m2 0.7
O1O.O24 1.0AInom DEVICE, END a
O72.146 m1 0.3
O1O.O25 1.0AInom DEVICE, END b
O72.145 Idiff>(CTS) 0.20Iref
O1O.OO9 110V
O72.144 Idiff>>> 30.0Iref
O72.143 Idiff>> 15.0Iref
0.2Iref
O19.O1O VEC GR ENDS a-b PS1 11
O72.142 Idiff>
O72.152 ENABLE PS1 YES
O16.O96 CALCULATEDEVALUATION In, END a
ADDRESS DESCRIPTION ACTIVE VALUE
O16.O97 EVALUATION In, END b CALCULATED
O18.OO9 HOLD TIME DYN, PARA CALCULATED
/PARAMETER/FUNCTION PARAMETERS/PARAMETER SUBSET/MAIN
ADDRESS
/PARAMETER/CONFIGURATION PARAMETER/DIFF
DESCRIPTION ACTIVE VALUE
O19.O17 Vnom PRIM END a PS1 11.0KV
ADDRESS DESCRIPTION ACTIVE VALUE
O56.O27 FUNCTION GOUP DIFF WITH
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/DIFF
ADDRESS DESCRIPTION ACTIVE VALUE
GENERAL ENABLE USER YES
O19.O16 REFERENCE POWER Sref 10.0MVA
/PARAMETER/CONFIGURATION PARAMETER/REF_1
ADDRESS DESCRIPTION ACTIVE VALUE
O56.O37 FUNCTION GOUP REF_1 WITH
ACTIVE VALUEDESCRIPTION
Vnom VT SEC
/PARAMETER/FUNCTION PARAMETERS/GENERAL FUNCTION/MAIN
O1O.OO2 11KV
O19.O8O
O19.O18 Vnom PRIM END b PS1 6.9KV
ADDRESS
/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/DIFF
O72.160 OV. I (5fo/Ifo) 20%
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E-Mail - [email protected] [email protected]
PHONE: 044-22251440, 22254870. Page 4 of 6
EXCEL POWER SWITCHGEAR
NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL
CHENNAI - 600 032. Date: 22/01/2011
GROUP
REF_1
REF_1
GROUP
REF_1
REF_1
REF_1
REF_1
REF_1
REF_1
REF_1
GROUP
REF_2
GROUP
REF_2
REF_2
GROUP
REF_2
REF_2
REF_2
REF_2
REF_2
REF_2
REF_2
GROUP
IDMT1
GROUP
IDMT1
IDMT1
GROUP
IDMT1
IDMT1
IDMT1
IDMT1
GROUP
IDMT2
O72.141 ENABLE YES
ADDRESS DESCRIPTION ACTIVE VALUE
O19.O5O YES
O19.O31 REFERENCE POWER Sref
O72.149 LOW IMPEDANCE
O72.150 Idiff> 0.2Iref
OPERATING MODE
O72.151 Idiff>>> 10.0Iref
O72.162 m1 O.2
O72.163 m2 1.5
O72.164 IR, m2 1.00Iref
ACTIVE VALUE
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/REF_1
GENERAL ENABLE USER
/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/REF_1
ADDRESS DESCRIPTION ACTIVE VALUE
O72.172 m1 O.2
O8O.OO7 OPERATING MODE LOW IMPEDANCE
O72.17O Idiff> 0.2Iref
O72.171 Idiff>>> 10.0Iref
ENABLE YES
/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/REF_2
ADDRESS DESCRIPTION
O72.161
/PARAMETER/CONFIGURATION PARAMETER/REF_2
ADDRESS DESCRIPTION ACTIVE VALUE
O56.O38 FUNCTION GOUP DIFF WITH
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/DIFF
ADDRESS DESCRIPTION ACTIVE VALUE
O19.O5O GENERAL ENABLE USER YES
O19.O32 REFERENCE POWER Sref 10.0MVA
/PARAMETER/CONFIGURATION PARAMETER/IDMT 1
O72.165 m2 1.5
O72.166 IR, m2 1.00Iref
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/IDMT 1
ADDRESS DESCRIPTION ACTIVE VALUE
O31.141 GENERAL ENABLE USER YES
O19.1O6 SELECT MEASURED INPUT END a
/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/IDMT 1
ADDRESS DESCRIPTION ACTIVE VALUE
O81.O5O ENABLE YES
O81.O59 GENERAL STARTING MODE WITH START In/Ineg
O81.O51 Iref, P 1.OOInom
O81.O52 Iref, P DYNAMIC 4.OOInom
/PARAMETER/CONFIGURATION PARAMETER/IDMT 2
ADDRESS DESCRIPTION ACTIVE VALUE
O56.O61 FUNCTION GOUP IDMT 2 WITH
10.0MVA
ADDRESS DESCRIPTION ACTIVE VALUE
O56.O51 FUNCTION GOUP IDMT 1 WITH
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E-Mail - [email protected] [email protected]
PHONE: 044-22251440, 22254870. Page 5 of 6
EXCEL POWER SWITCHGEAR
NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL
CHENNAI - 600 032. Date: 22/01/2011
GROUP
IDMT2
IDMT2
GROUP
IDMT2
IDMT2
IDMT2
IDMT2
GROUP
V<>
GROUP
V<>
GROUP
V<>
V<>
V<>
V<>
V<>
V<>
V<>
V<>
V<>
V<>
tV<<O76.OO10
O76.O46 Vmin>
V<
V<<
tV<
O76.OO7
O76.OO8
O76.OO9
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/IDMT 2
ADDRESS DESCRIPTION ACTIVE VALUE
O31.142 GENERAL ENABLE USER YES
O19.116 SELECT MEASURED INPUT END b
/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/IDMT 2
ADDRESS DESCRIPTION ACTIVE VALUE
O81.17O ENABLE YES
O81.179 GENERAL STARTING MODE WITH START In/Ineg
O81.171 Iref, P 1.OOInom
O81.172 Iref, P DYNAMIC 4.OOInom
/PARAMETER/CONFIGURATION PARAMETER/V<>
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/V<>
/PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/V<>
ADDRESS DESCRIPTION ACTIVE VALUE
O23.O3O GENERAL ENABLE USER YES
ADDRESS DESCRIPTION ACTIVE VALUE
O76.OOO ENABLE YES
O76.OO3 V> 1.1OVnom
O76.OO4 V>> 1.2OVnom
O76.OO5 tV> 5.OOS
tV>>O76.OO6
O.25Vnom
1.OOS
O.9Vnom
O.8Vnom
5.OOS
1.OOS
ADDRESS DESCRIPTION ACTIVE VALUE
O56.O1O FUNCTION GOUP V<> WITH
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PHONE: 044-22251440, 22254870. Page 6 of 6