November 12, 2017 | Author: erkamlakar2234 | Category: N/A
EXCEL POWER SWITCHGEAR NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL CHENNAI - 600 032.
Date: 22/01/2011
TRANSFOMER DIFFERENTIAL PROTECTION AREVA MICOM P632 11KV / 6.9KV, 10MVA TRANSFORMER DIFFERENTIAL PROTECTION TRANSFORMER DETAILS POWER
: 10MVA
HV SIDE VOLTAGE
: 11KV
HV SIDE CT RATIO
: 600/1A
LV SIDE VOLTAGE
: 6.9KV
LV SIDE CT RATIO
: 1000/1A
% IMPEDANCE
: 8.35%
VECTOR GROUP
: DYN11
TAP CHANGER : +5% T0 -5% 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 RECOMMENDED SETTINGS FOR DIFFERENTIAL PROTECTION: Idiff > m1 m2 IR, m2 Idiff>> Idiff>>>
: 0.2Iref :0.2 :0.8 :1.5Iref :8.0Iref :10.0Iref
WEBSITE : www.excelpower.in E-Mail -
[email protected] [email protected] PHONE: 044-22251440, 22254870.
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EXCEL POWER SWITCHGEAR NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL CHENNAI - 600 032.
Date: 22/01/2011
CALCULATION TO VERIFY THE BIAS SETTINGS: AT NORMAL CONDITION CURRENT IN HV BIAS CIRCUIT ( WINDING a ) = 10MVA/ (1.732 * 11KV) FULL LOAD PRIMARY CURRENT = 524.88A EQUIVALENT CURRENT IN CT SECONDARY (600/1A) ( 0.874A WILL BE CALCULATED BY THE RELAY) REQUIRED RATIO COMPENSATION (1.14 WILL BE CALCULATED BY THE RELAY)
= 524.88/600=0.874A = 1/0.874=1.14
AT NORMAL CONDITION CURRENT IN LV BIAS CIRCUIT ( WINDING b ) FULL LOAD PRIMARY CURRENT
= 10MVA/ (1.732 * 6.9KV) = 836.76A
EQUIVALENT CURRENT IN CT SECONDARY
= 836.76A*1/1000 = 0.83676A
(WILL BE CALCULATED BY THE RELAY) REQUIRED RATIO COMPENSATION
=1/ 0.83676A =1.195
(WILL BE CALCULATED BY THE RELAY) AT -5% TAP CONDITION CURRENT IN HV BIAS CIRCUIT (WINDING a ) -5% OF 11KV
= 10.45KV
FULL LOAD PRIMARY CURRENT
= 10MVA/(1.732*10.45KV) = 552.5A
EQUIVALENT CURRENT IN CT SECONDARY
=0.920
WITH THE RATIO CORRECTION THE CURRENT AT THE RELAY BIAS TERMINAL
=0.920*1.14 =1.0488A
HENCE THE DIFFERENTIAL CURRENT
= 1.0488-1 =0.0488A
BIAS CURRENT
=(I1 + I2)/2 =(1.0488+1)/2 =1.0244A
OPERATING CURRENT OF THE RELAY WILL BE ( BIAS SETTING m1=0.2)
=Is+(BIAS SETTING m1 * BIAS CURRENT) = 0.2+(0.2*1.0244) =0.4048A
WEBSITE : www.excelpower.in E-Mail -
[email protected] [email protected] PHONE: 044-22251440, 22254870.
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EXCEL POWER SWITCHGEAR NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL CHENNAI - 600 032.
Date: 22/01/2011
DIFFERENTIAL CURRENT AT WORST TAP CONDITION SHOULD NOT BE MORE THAN 90% OF THE OPERATING CURRENT FOR BETTER STABILITY DIFFERENTIAL CURRENT AT WORST TAP SET
=0.0488A
OPERATING CURRENT AT WORST TAP SET
=0.4048A
THIS IS LESS THAN 12% OF OPERATING CURRENT HENCE BIAS SETTINGS OF 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 (5% OF 11KV = 11.55KV)
= 10MVA/(1.732*11.55KV) = 499.88A
EQUIVALENT CURRENT IN CT SECONDARY
= 0.833A
WITH RATIO CORRECTION THE CURENT AT THE RELAY BIAS =0.833*1.14 TERMNAL(I1) = 0.9496A HENCE THE DIFFERENTIAL CURRENT
= 1-0.9496 = 0.0504A
BIAS CURRENT
=(I1+I2)/2 =(0.9496+1)/2 =0.9748A
OPERATING CURRENT OF THE RELAY WIL BE
=Is+(BIAS SETTING m1 * BIAS CURRENT) =0.2+(0.2*0.9748) =0.39496A
DIFFERENTIAL CURRENT AT WORST TAP CONDITION SHOULD NOT BE MORE THAN 90% OF OPERATING CURRENT FOR BETTER STABILITY DIFFERENTIAL CURRENTAT WORST TAP CONDITION
=0.0504A
OPERATING CURRENT AT WORST TAP
=0.39496A
THIS IS LESS THAN 7% OF OPERATING CURRENT HENCE BIAS SETTING OF m1
=20%
BIAS SETTING OF m2
=80% FOR THROUGH FAULT STABILITY
WEBSITE : www.excelpower.in E-Mail -
[email protected] [email protected] PHONE: 044-22251440, 22254870.
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EXCEL POWER SWITCHGEAR NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL CHENNAI - 600 032.
Date: 22/01/2011
CONFIGURATION IN P632 RELAY
ADDRESS OO3.O3O O10.O3O O10.O49 O19.O2O O19.O21 O1O.OO2 O1O.O24 O1O.O25 O1O.OO9
/PARAMETER/FUNCTION PARAMETERS/GLOBAL/MAIN DESCRIPTION ACTIVE VALUE GROUP MAIN DEVICE ONLINE YES(=ON) MAIN NOMINAL FREQUENCY fnom 50HZ MAIN PHASE SEQUENCE A-B-C MAIN Inom CT PRIM, END a 600A MAIN Inom CT PRIM, END b 1000A MAIN Vnom VT PRIM 11KV MAIN Inom DEVICE, END a 1.0A MAIN Inom DEVICE, END b 1.0A MAIN Vnom VT SEC 110V
/PARAMETER/FUNCTION PARAMETERS/GENERAL FUNCTION/MAIN ADDRESS DESCRIPTION ACTIVE VALUE GROUP O16.O96 EVALUATION In, END a CALCULATED MAIN O16.O97 EVALUATION In, END b CALCULATED MAIN O18.OO9 HOLD TIME DYN, PARA CALCULATED MAIN /PARAMETER/FUNCTION PARAMETERS/PARAMETER SUBSET/MAIN ADDRESS DESCRIPTION ACTIVE VALUE GROUP O19.O17 Vnom PRIM END a PS1 11.0KV MAIN O19.O18 MAIN Vnom PRIM END b PS1 6.9KV
ADDRESS O56.O27
/PARAMETER/CONFIGURATION PARAMETER/DIFF DESCRIPTION GROUP DIFF FUNCTION GOUP DIFF
ACTIVE VALUE WITH
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/DIFF ADDRESS DESCRIPTION ACTIVE VALUE GROUP GENERAL ENABLE USER YES O19.O8O DIFF O19.O16 REFERENCE POWER Sref 10.0MVA DIFF /PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/DIFF ADDRESS DESCRIPTION ACTIVE VALUE GROUP O72.152 ENABLE PS1 YES DIFF O19.O1O VEC GR ENDS a-b PS1 11 DIFF O72.142 Idiff> 0.2Iref DIFF O72.143 Idiff>> 15.0Iref DIFF O72.144 Idiff>>> 30.0Iref DIFF O72.145 DIFF Idiff>(CTS) 0.20Iref O72.146 DIFF m1 0.3 O72.147 DIFF m2 0.7 O72.148 DIFF IR, m2 4.0Iref DIFF NOT PHASE SELECTIVE O72.159 OP.MODE RUSH RST DIFF O72.155 RUSH I (2fo/IfO) 20% DIFF O72.156 O -SEQ FILT.a en YES DIFF O72.158 O -SEQ FILT.b en YES O72.160 DIFF OV. I (5fo/Ifo) 20%
ADDRESS O56.O37
/PARAMETER/CONFIGURATION PARAMETER/REF_1 DESCRIPTION GROUP REF_1 FUNCTION GOUP REF_1
WEBSITE : www.excelpower.in E-Mail -
[email protected] [email protected] PHONE: 044-22251440, 22254870.
ACTIVE VALUE WITH
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EXCEL POWER SWITCHGEAR NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL CHENNAI - 600 032.
Date: 22/01/2011
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/REF_1 ADDRESS DESCRIPTION ACTIVE VALUE GROUP O19.O5O REF_1 GENERAL ENABLE USER YES O19.O31 REF_1 REFERENCE POWER Sref 10.0MVA /PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/REF_1 ADDRESS DESCRIPTION ACTIVE VALUE GROUP O72.141 REF_1 ENABLE YES O72.149 REF_1 OPERATING MODE LOW IMPEDANCE O72.150 Idiff> 0.2Iref REF_1 O72.151 Idiff>>> 10.0Iref REF_1 O72.162 REF_1 m1 O.2 O72.163 REF_1 m2 1.5 O72.164 REF_1 IR, m2 1.00Iref
ADDRESS O56.O38
/PARAMETER/CONFIGURATION PARAMETER/REF_2 DESCRIPTION GROUP REF_2 FUNCTION GOUP DIFF
ACTIVE VALUE WITH
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/DIFF ADDRESS DESCRIPTION ACTIVE VALUE GROUP O19.O5O REF_2 GENERAL ENABLE USER YES O19.O32 REF_2 REFERENCE POWER Sref 10.0MVA /PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/REF_2 ADDRESS DESCRIPTION ACTIVE VALUE GROUP O72.161 REF_2 ENABLE YES O8O.OO7 OPERATING MODE LOW IMPEDANCE REF_2 O72.17O REF_2 Idiff> 0.2Iref O72.171 REF_2 Idiff>>> 10.0Iref O72.172 REF_2 m1 O.2 O72.165 REF_2 m2 1.5 O72.166 REF_2 IR, m2 1.00Iref
ADDRESS O56.O51
/PARAMETER/CONFIGURATION PARAMETER/IDMT 1 DESCRIPTION GROUP IDMT1 FUNCTION GOUP IDMT 1
ACTIVE VALUE WITH
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/IDMT 1 ADDRESS DESCRIPTION ACTIVE VALUE GROUP O31.141 IDMT1 GENERAL ENABLE USER YES O19.1O6 SELECT MEASURED INPUT END a IDMT1 /PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/IDMT 1 ADDRESS DESCRIPTION ACTIVE VALUE GROUP O81.O5O IDMT1 ENABLE YES O81.O59 IDMT1 GENERAL STARTING MODE WITH START In/Ineg O81.O51 IDMT1 Iref, P 1.OOInom O81.O52 IDMT1 Iref, P DYNAMIC 4.OOInom
ADDRESS O56.O61
/PARAMETER/CONFIGURATION PARAMETER/IDMT 2 DESCRIPTION GROUP IDMT2 FUNCTION GOUP IDMT 2
WEBSITE : www.excelpower.in E-Mail -
[email protected] [email protected] PHONE: 044-22251440, 22254870.
ACTIVE VALUE WITH
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EXCEL POWER SWITCHGEAR NO.39, ACHUTHAN FIRSTCROSS, EKKADUTHANGAL CHENNAI - 600 032.
Date: 22/01/2011
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/IDMT 2 ADDRESS DESCRIPTION ACTIVE VALUE GROUP O31.142 IDMT2 GENERAL ENABLE USER YES IDMT2 O19.116 SELECT MEASURED INPUT END b /PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/IDMT 2 ADDRESS DESCRIPTION ACTIVE VALUE GROUP O81.17O ENABLE YES IDMT2 O81.179 IDMT2 GENERAL STARTING MODE WITH START In/Ineg O81.171 Iref, P 1.OOInom IDMT2 O81.172 Iref, P DYNAMIC 4.OOInom IDMT2
ADDRESS O56.O1O
/PARAMETER/CONFIGURATION PARAMETER/V DESCRIPTION GROUP FUNCTION GOUP V V
ACTIVE VALUE WITH
/PARAMETER/FUNCTION PARAMETER/GENERAL FUNCTION/V ADDRESS DESCRIPTION ACTIVE VALUE GROUP O23.O3O V GENERAL ENABLE USER YES /PARAMETER/FUNCTION PARAMETER/PARAMETER SUBSET/V ADDRESS DESCRIPTION ACTIVE VALUE GROUP O76.OOO ENABLE YES V O76.OO3 V> 1.1OVnom V O76.OO4 V>> 1.2OVnom V O76.OO5 tV> 5.OOS V O76.OO6 V tV>> 1.OOS O76.OO7 V< O.9Vnom V O.8Vnom O76.OO8 V V
