Presentation on Power Transformer & Distribution Transformer Protection
Transformer protection commissioning tools
-
Upload
michaeljmack -
Category
Engineering
-
view
178 -
download
3
Transcript of Transformer protection commissioning tools
![Page 1: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/1.jpg)
Transformer Differential ProtectionCommissioning Tools
TransformerDifferential Protection System
Commissioning Tools
TransformerDifferential Protection System
Commissioning Tools
![Page 2: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/2.jpg)
Transformer Differential ProtectionCommissioning Tools
Advanced Metering- Sequence components for all windings
Positive, negative and zeroRestraint and differential currents
Vector Metering- Uncompensated
Raw signal- Compensated
Post vector and ratio corrections
Digital Oscillography- All winding currents
Commissioning Tools
![Page 3: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/3.jpg)
Transformer Differential ProtectionCommissioning Tools
Verifies Relay System Performs as per the Design.
Injection of Current and Voltage to Verify Relay Settings.
Verify proper relay Inputs and Outputs.
Verify Proper Trip Logic.
Verify Tripping and Targets.
Commissioning Testing
![Page 4: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/4.jpg)
Transformer Differential ProtectionCommissioning Tools
Verifies In-Service Relay System is Working Properly.
Done Periodically.
E-M and Static Relays Repeat Commissioning Test.
Digital Relays Require Less Extensive Testing.
Maintenance Testing
![Page 5: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/5.jpg)
Transformer Differential ProtectionCommissioning Tools
Y-Y-Y, yyy, normal load flow
Y-Y-Y, yyy, rolled phase on W2
Δ-Y-Y, yyy, normal load flow
Δ-Y-Y, yyy, rolled phase on W1
Commissioning Examples
![Page 6: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/6.jpg)
Transformer Differential ProtectionCommissioning Tools
Test equipment is used to simulate 3-winding transformers of various winding and CT configurations
Injected 3A into W1, injected 1.5A into W2 and W3 to simulate load flow
Assumed 1:1 transformer and 1:1 CTs for simplicity
Created correct “base case”
Created incorrect case
Used advanced protection system tools to “diagnose” the incorrect connections
Details
![Page 7: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/7.jpg)
Transformer Differential ProtectionCommissioning Tools
Y:Y:Y, yyy1:1 Transformer Ratio
1:1 CTs, Normal
Y:Y:Y, yyy1:1 Transformer Ratio
1:1 CTs, Normal
![Page 8: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/8.jpg)
Transformer Differential ProtectionCommissioning Tools
Three Line:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 9: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/9.jpg)
Transformer Differential ProtectionCommissioning Tools
0.0
0.0
High level of positivesequence current
Low levels of negative and zero sequence current
Advanced Metering:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 10: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/10.jpg)
Transformer Differential ProtectionCommissioning Tools
Very high restraintcurrent
Very low differential current
Advanced Metering:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 11: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/11.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase A at 0 degreesW2, Phase A at 180 degreesW3, Phase A at 180 degrees
W1, Phase A at 0 degreesW2, Phase A at 180 degreesW3, Phase A at 180 degrees
Vector Metering:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 12: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/12.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase A
W2, Phase AW3, Phase A
Analog Traces
Digital Oscillography:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 13: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/13.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase A
W2, Phase AW3, Phase A
3 = (-1.5) + (-1.5)
RMS
Digital Oscillography:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 14: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/14.jpg)
Transformer Differential ProtectionCommissioning Tools
Y:Y:Y, yyy
1:1 Transformer Ratio
1:1 CTs
Roll ØA, W2
Y:Y:Y, yyy
1:1 Transformer Ratio
1:1 CTs
Roll ØA, W2
![Page 15: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/15.jpg)
Transformer Differential ProtectionCommissioning Tools
Three Line:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Roll ØA, W2
![Page 16: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/16.jpg)
Transformer Differential ProtectionCommissioning Tools
0.0
0.0
High level of positivesequence current
Levels of negative and zero sequence current,Positive sequence current not at phase current level
Advanced Metering:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Roll ØA, W2
![Page 17: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/17.jpg)
Transformer Differential ProtectionCommissioning Tools
Restraint current lessthan through current
High differential current
Advanced Metering:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Roll ØA, W2
![Page 18: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/18.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase A at 0 degreesW2, Phase A at 0 degrees (180)
W3, Phase A at 180 degrees
W1, Phase A at 0 degreesW2, Phase A at 0 degrees (180)
W3, Phase A at 180 degrees
Vector Metering:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Roll ØA, W2
![Page 19: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/19.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase AW2, Phase A
W2, Phase AW3, Phase A
Differential Trip
Analog Traces
Digital Oscillography:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Roll ØA, W2
![Page 20: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/20.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase AW2, Phase A
W2, Phase AW3, Phase A
3 = (-1.5) + (-1.5)
Differential Trip
RMS
Digital Oscillography:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Roll ØA, W2
![Page 21: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/21.jpg)
Transformer Differential ProtectionCommissioning Tools
∆:Y:Y, yyy
1:1 Transformer Ratio
1:1 CTs, Normal
∆:Y:Y, yyy
1:1 Transformer Ratio
1:1 CTs, Normal
![Page 22: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/22.jpg)
Transformer Differential ProtectionCommissioning Tools
Three-Line:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 23: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/23.jpg)
Transformer Differential ProtectionCommissioning Tools
0.0
0.0
High level of positivesequence current
Low levels of negative and zero sequence current
Advanced Metering:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 24: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/24.jpg)
Transformer Differential ProtectionCommissioning Tools
Very high restraintcurrent
Very low differential current
Advanced Metering:Y:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 25: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/25.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase A at 0 degreesW2, Phase A at 30 degreesW3, Phase A at 30 degrees
W1, Phase A at 0 degreesW2, Phase A at 180 degreesW3, Phase A at 180 degrees
Phaser Metering:∆:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 26: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/26.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase A
W2, Phase AW3, Phase A
Analog Traces
Digital Oscillography:∆:Y:Y, 1:1 Ratio, 1:1 CTs, Normal
![Page 27: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/27.jpg)
Transformer Differential ProtectionCommissioning Tools
∆:Y:Y, yyy
1:1 Transformer Ratio
1:1 CTs
Roll A-∆
∆:Y:Y, yyy
1:1 Transformer Ratio
1:1 CTs
Roll A-∆
![Page 28: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/28.jpg)
Transformer Differential ProtectionCommissioning Tools
Three Line:∆:Y:Y, 1:1 Ratio, 1:1 CTs, Roll A-∆
![Page 29: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/29.jpg)
Transformer Differential ProtectionCommissioning Tools
0.0
0.0
Levels of negative and zero sequence current,Positive sequence current not at phase current level
High level of positive sequence current
Advanced Metering:∆:Y:Y, 1:1 Ratio, 1:1 CTs, Roll A-∆
![Page 30: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/30.jpg)
Transformer Differential ProtectionCommissioning Tools
Restraint current lessthan through current
High differential current
Advanced Metering:∆:Y:Y, 1:1 Ratio, 1:1 CTs, Roll A-∆
![Page 31: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/31.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase A at 0 degrees (180)W2, Phase A at 210 degreesW3, Phase A at 210 degrees
W1, Phase A at 0 degrees (180)W2, Phase A at 0 degreesW3, Phase A at 0 degrees
Vector Metering:∆:Y:Y, 1:1 Ratio, 1:1 CTs, Roll A-∆
![Page 32: Transformer protection commissioning tools](https://reader038.fdocuments.us/reader038/viewer/2022103010/58a89ece1a28ab7f458b49c7/html5/thumbnails/32.jpg)
Transformer Differential ProtectionCommissioning Tools
W1, Phase A
W2, Phase AW3, Phase A
Differential Trip
Analog Traces
Digital Oscillography:∆:Y:Y, 1:1 Ratio, 1:1 CTs, Roll A-∆
©2008 Beckwith Electric Co., Inc.