PowerPD Case Studies Rev 2.6
-
Upload
vtechelectric -
Category
Documents
-
view
53 -
download
21
description
Transcript of PowerPD Case Studies Rev 2.6
![Page 1: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/1.jpg)
CASE STUDYCASE STUDY
![Page 2: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/2.jpg)
Latest Case History
![Page 3: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/3.jpg)
PD Test ResultsPD Test Results
![Page 4: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/4.jpg)
Partial Discharge Loose Parts ArcingPartial Discharge, Loose Parts, Arcing
![Page 5: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/5.jpg)
Exact Spot Found
![Page 6: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/6.jpg)
Exact Spot Found
![Page 7: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/7.jpg)
Case Study 2DC transformer # 31@ China@
![Page 8: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/8.jpg)
The mechanical (loose part) signal cannot always make a uniformed signal and does not produce a current. Thus the signal detected from #32 transformer is caused by a loose part that generates arcing (PD)
![Page 9: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/9.jpg)
Loose part on lead connectionLoose part on lead connection
![Page 10: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/10.jpg)
Case Study 3138KV, 100MVA Substation @ Texas, US
![Page 11: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/11.jpg)
This is actual field data from the PD-TP500A. The top screen is Acoustic activity from sensor 2 (Red trace) This shows graphically a real PD repeating pattern. The bottom screen (green trace) is the electrical discharge to ground This is captured via the ‘High Frequency Current Transducer’the electrical discharge to ground. This is captured via the High Frequency Current Transducer
![Page 12: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/12.jpg)
138 KV BUSHING ON PHASE B (PRIMARY) TERMINAL LEADWAS DEFECTED.
![Page 13: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/13.jpg)
138 KV TERMINAL LEAD WAS DEFECTED.
![Page 14: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/14.jpg)
![Page 15: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/15.jpg)
Case Study 4500KV, 1500MVA Substation @ Idaho, US
![Page 16: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/16.jpg)
Transformer; This data collected in June 4, 2007 from the transformer shows a very serious condition coming from outside of transformer, which
has a lot of decrease in the resistance (defective of insulator is high)has a lot of decrease in the resistance (defective of insulator is high).
![Page 17: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/17.jpg)
PD transmits through the air and power line to all grounds of substation equipments.q p
![Page 18: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/18.jpg)
![Page 19: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/19.jpg)
Actual location of PD source
![Page 20: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/20.jpg)
Actual location of PD source
![Page 21: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/21.jpg)
Case Study 566 KV transformer # 2@ India
NDPL in the India, transformer #1 exploded (15 days till testing Tr#2)
![Page 22: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/22.jpg)
66 KV transformer # 1@ India
![Page 23: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/23.jpg)
![Page 24: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/24.jpg)
Transformer; As PD increases, the resistance decreases (defective of insulator is high). Should prepare for the maintenance.
![Page 25: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/25.jpg)
PowerPD was Locate Partial Discharge point using their “PD-TP500A” test device.The location of PD was found within 30 minutes!Th Middl f B h id # 3(Hi h V lt id )The Middle of B phase, side # 3(High Voltage side)
![Page 26: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/26.jpg)
Case Study 6Rotating machine (condensing), US
![Page 27: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/27.jpg)
The data was collected three months before the condensing rotating machine failed
![Page 28: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/28.jpg)
Fault 1 (on “Back end”)
![Page 29: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/29.jpg)
Fault 2 (on “back end”)
![Page 30: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/30.jpg)
Fault 3 (on “front end”)
![Page 31: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/31.jpg)
45 MVA Generator in Thailand
![Page 32: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/32.jpg)
![Page 33: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/33.jpg)
Internal Inspection Findings
![Page 34: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/34.jpg)
??? MVA G t??? MVA Generator in Thailand
![Page 35: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/35.jpg)
![Page 36: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/36.jpg)
15 MVA Generator in Thailand
![Page 37: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/37.jpg)
45 MVA Generator in Thailand
![Page 38: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/38.jpg)
126.6 MVA Generator in ThailandThailand
![Page 39: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/39.jpg)
148 MW Generator in US
![Page 40: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/40.jpg)
Case Study 7PD source from inside of insulation
![Page 41: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/41.jpg)
Internal Inspection Findings
![Page 42: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/42.jpg)
Case Study 8Signal (PD and 6 pulse) was collected from HFCT installed on the tank ground of
Transformer. This signal(PD and 6 pulse) transmitted from the generator side.
![Page 43: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/43.jpg)
6 pulse coming from Generator side
![Page 44: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/44.jpg)
Inspection Findings
![Page 45: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/45.jpg)
Case Study 9Warning level of PD was collected from HFCT installed on the tankWarning level of PD was collected from HFCT installed on the tank ground of Transformer. This PD transmitted from the generator and shot down the generator for maintenanceshot down the generator for maintenance
![Page 46: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/46.jpg)
PD burst collected from HFCT
![Page 47: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/47.jpg)
Inspection Findings
After serviceAfter service
![Page 48: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/48.jpg)
Case Study 10230 KV 300 MVA @ Thailand@
![Page 49: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/49.jpg)
PD burst collected from sensor3(yellow)
![Page 50: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/50.jpg)
Internal Inspection Finding
![Page 51: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/51.jpg)
Case Study 11500 KV 500MVA @ Philippines500 KV 500MVA @ Philippines
![Page 52: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/52.jpg)
PD collected from AE and HFCT
![Page 53: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/53.jpg)
Internal Inspection Finding: Burnt cable from 500kv winding to K pic2 3Burnt cable from 500kv winding to K_pic2.3
![Page 54: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/54.jpg)
Case Study 12 Transformer Test Results:
• TTR Test OK• Doble Test OKDoble Test OK• Doble SFR Test inconclusive• ABB DFR Test:
– Indicates a problem between H&X Winding - Tertiary• Final DGA Test –
Acetylene 3 ppmMethane 1259 ppmEthane 163 ppmEthylene 7 ppmHydrogen 27123 ppm
• ABB Internal Inspection – B phase core shifted due to through f lt / i di t l ifaults/winding telescoping
![Page 55: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/55.jpg)
Transformer test with TP500A @ US
![Page 56: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/56.jpg)
Internal Inspection Findings
E id f h ti b BØ C C li D tEvidence of heating above BØ Core Cooling Ducts
![Page 57: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/57.jpg)
Internal Inspection Findings
Shifted Core over BØ:
Shifted approx ¾” vertically & ½” Horizontally
![Page 58: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/58.jpg)
Case Study 13PD source between winding (Data collected with TP500A)
![Page 59: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/59.jpg)
Internal Inspection Findings
![Page 60: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/60.jpg)
Case Study 14 Transformer Test Results:
• Final DGA TestFinal DGA Test Methane 532 ppmEthane 363 ppmEthane 363 ppmEthylene 13 ppmHydrogen 1,140 ppm (From last year 08 Hydrogen was at 964)y g , pp ( y y g )
![Page 61: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/61.jpg)
PD source from inside of insulation (Data collected with TP500A)
![Page 62: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/62.jpg)
Internal Inspection Findings
![Page 63: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/63.jpg)
Case Study 15 220 KV GIS Test Results: Data collected with iGMS P8220 KV GIS Test Results: Data collected with iGMS_P8
Data from UHF1
Data from UHF2
Data from HFCT
![Page 64: PowerPD Case Studies Rev 2.6](https://reader034.fdocuments.us/reader034/viewer/2022052216/552d4021550346fd188b464b/html5/thumbnails/64.jpg)
Case Study 16 220 KV GIS Test Results: Data collected with iGMS_P8_
Data from UHF 1 Data from UHF 2 Data from UHF 3 Data from UHF 4