33.DUOBIAS-M Relay Testing
Transcript of 33.DUOBIAS-M Relay Testing
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Brief Introduction for Automated Relay Testing(Relay type DUOBIAS-M)
Kamin DaveManager – Sales & Applications
South Asia & Middle East
DOBLE ENGINEERING COMPANY
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Protection Relay Testing:
Testing of Differential Protection Relay type DUOBIAS-M
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Relay Details: DUOBIAS-M
Two/Three Winding Differential Protection relaysInbuilt IDMTL & Inst. O/C function for backup ProtectionLow Impedance Restricted Earth Fault ProtectionAutomatic calculation for TAP values based on CTRSettings for Transformer & CT vector group compensations 2nd Harmonic content setting during inrush period due to point on wave switching
DFT (Independent or Cross Blocking)
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Relay Details: DUOBIAS-MMAKE : REYROLLEMODEL : DUOBIAS-MRelay Settings:Differential Element:
MVA = 20VWDG1 = 110KVVWDG2 = 11KVTRCON = DYn11.CTCON = YYID> = 0.2Bias Slope Limit = 4.0PUID>> = 8.0PUm1 = 20% (0.2pu)(2f0) / I(f0) = 20.0%
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Relay Details: DUOBIAS-MMAKE : REYROLLEMODEL : DUOBIAS-MLocation : 220KV Kavoor SS, KPTCLRelay Settings:Differential Element:
CTR1 = 200CTR2 = 1200W1 = 1.9057W2 = 1.14345In = 1AStar winding is earthed
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Relay Details: DUOBIAS-MFLC on TR Primary side:
IFLC = (20*1000) / (1.7325*110)= 104.94 Ampere
FLC on TR Secondary side:IFLC = (20*1000) / (1.7325*11)
= 1049.45 AmpereCF1 = (1*104.94) / (200*1) = 0.699W1 = (1 / CF1) = (1/0.699) = 1.9057CF2 = (1*1049.45) / (1200*1) = 0.874W2 = (1/CF2) = (1/0.874) = 1.14345
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Relay Setting: REYDISP
Diff Settings
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Relay Setting: REYDISP
CT Ratio for WDG1 & WDG2
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Relay Characteristic: Dual Slope
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Relay Characteristic on Settings:
m1=20%m2
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Test Equipment
• Make : DOBLE
• Model : F6150
Software
• F6TesT Version 2.19-1064
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IA
IB
IC
I1
I2
I3
DUOBIAS
Test Circuit:
Source Configurations:Six current sources
Winding 1 currents
Winding 2 currents
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• Pickup test for Winding1
• Pickup test for winding2
• Slope Characteristic test
• 2nd Harmonic test
Tests conducted:
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Winding1 Pickup Test
Use “RAMP” Module
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Winding Pickup Test:Pickup Test for Winding1 (WDG1):-Ipickup = (ID)*CF1
= (0.2)*0.524= 0.11A
Pickup Test for Winding2 (WDG2):-Ipickup = (ID)*CF2
= (0.2)*0.944 = 0.17A
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How to Create Test Plan in Software???
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Right click on Mouse & Click on “Append”to Create new location in location level
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Right click on Mouse & Click on “Append”to Create new relay in Relay level
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Right click on Mouse & Click on “Append”to add New Testplan in Testplan level
Knowledge Is PowerSM
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Right click on Mouse & Click on “Append”to add New Testplan in Testplan level
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Click on “Test Type”& select “Ramp” module
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Double click on“Test name” & createNew test definition
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Click on Pulldown arrow &Select “6 Currents (Right bank)”
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Click on “Yes”
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Now, it is showing6 Current sources for test
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Pickup Test: WDG1
Expected value = 0.1A Actual Test value = 0.11A
WDG1 current sources
Select Trigger “Open to Close”
Pickup value
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Pickup Test: WDG1
Save & Close module”
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Winding2 Pickup Test
Use “RAMP” Module
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Right click on Mouse & Click on “Append”to add New Testplan in Testplan level
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Click on “Test Type”& select “Ramp” module
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Double click on“Test name” & createNew test definition
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Click on Pulldown arrow &Select “6 Currents (Right bank)”
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Click on Pulldown arrow &Select “6 Currents (Right bank)”
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Click on “Yes”
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Now, it is showing6 Current sources for test
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Pickup Test: WDG2
Expected value = 0.17A Actual Test value = 0.18A
WDG2 current sources
Select Trigger “Open to Close”
Pickup value
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Slope Characteristic Test
Use “DiffChar” Module
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Slope Characteristic Test:
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Slope Characteristic Test:Vector Compensation
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Slope Characteristic Test:
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Slope Characteristic Test:Vector Compensation
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Slope Characteristic Test:
YDY0 YD1
Relay
0o
0o
+30o
0o
YD11 Vector Compensation
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How to create testplan???
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Click on “Add” button
Select “Differential” Function, enter “Function name”And Click on “Next” button
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Select “Bias Formula” from list
Bias current Formula:Ibias = (IP+IS) / 2
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Enter YDY0 & YD1 R
Amplitude Compensation
DYn11
YDY0 YD1
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Click on “Modify” button
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Enter Slope SLP1 = 20% & SLP2 based on relay setting
SLP1=20%
SLP2
How to AdjustSlope?
Enter Pickup value
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Select Bias current (Ibias) formula from list
Bias current Formula:Ibias = (IP+IS) / 2
Click on “Close” buttonAfter setting Slope curve
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Click on “Append” button to Create new test module
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Select “DiffChar” module
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Select relay settings from list
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Select Test elements
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Enter Max test current 15A
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Select Trigger “Open to Close”
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Select test points for test & click on Add Point to List
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Blue line showsExpected curve
White line showsActual results on Selected points
Test results
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Export report in PDF, MS Word, Text format
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Second Harmonics Test
Use “DATC 6.38” Module
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%2nd Harmonics aremore during TREnergization
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IA
IB
IC
I1
I2
I3
DUOBIAS
2nd Harmonic Test : Test Method
50Hz +100HzCombine signal
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How to Set Harmonics in“DATC 6.38” Module??
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Click on Harmonic
Select 2nd Harmonic
Enter 2nd HarmonicContent 18% inAll three phases
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Click on Time Configuration
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Select contact status“O C”
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Enter trip time value
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Click on Oscillogram
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18% 2nd Harmonics in all three phases
Click on “Start Transient” button
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Harmonic Analysis barShows % of 2nd Harmonicis 18%
Harmonic Analysis barShows FundamentalCurrent is 100%
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Apparatus Maintenance and Power Management for Energy Delivery
2nd Harmonic Test : Trip/Block
Relay issued Trip commandBecause injected valueOf 2nd harmonicContent is less thanSet value
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Click on Harmonic
Select 2nd Harmonic
Enter 2nd HarmonicContent 22% inAll three phases
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Click on Oscillogram
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2nd Harmonic Test : Trip/Block
22% 2nd Harmonics in all three phases
Start Transient
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2nd Harmonic Test : Trip/Block
Relay Issued Trip command when 2nd Harmonic components(18%) Less than set value (20%)
Relay blocked trip command when 2nd Harmonic components(22%) more than set value (20%)
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DOBLE ENGINEERING COMPANY305-SAKAR, O.P. ROADNR. ABS TOWERVADODARA-390 015INDIA. Tel:- +91 265 655 77 15EMAIL ID:- [email protected]:- www.doble.com