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CONTENTS
Foreword (vii)
APPLICATION 1. Some of the Issues Pertaining to Power
Transformers in Indian Power Sector
- SK. Ray Mohapatra 3
2. Dynamic Loading of Power Transformers Based on Real-Time
Monitoring - Brian D. Sparling 14
3. Standardization of Large Power Transformers - Dinkar Devate,
Amit Mittal and MinaI Kataria 25
4. Selection Criteria for Generator Transformer in Sub &
Super Critical Power Stations - Raryan Bandyopadhyay, Mitesh V.
Shah and Dominic S Fernandes 35
5. Nitrogen based Transformer Explosion and Fire Prevention
System - A Comprehensive Asset Management Solution - VK. Wakchaure
and TP Govindan 51
6. Specification Options, Online Measurement & QAP for
Enhancement of Transformer Operational Life - L. Subramanyam. A.
Jyothish Kumar and Y C. Maryunatha 57
DESIGN & FACTORY TESTING 7.
8.
9.
10.
11.
12.
An Approach to Reliable Design ofUHV Transformer for POWERGRID's
1200 kV Testing Station at Bina - VK. Lakhiani, G Sreelatha and MM
Goswami
Development of Ultra - High Voltage (UHV) 1000 kV AC Transformer
- Zhong Juntao
Development of New Specification for Transformer Oil used during
Processing & Testing of Power Transformers at Works - R. K.
Tiwari, S K. Mahajan and D. Varyani Development of Phase Shifting
Transformers - R.K. Tiwari, JS Kuntia and S Sachdeva
Standardized Specification for Flux-density and CRGO for
Optimizing the use of High-permeability CRGO & Conventional
eRGO - Deepak Srivastava and D. Krishna lyer
Dissolved Gas Analysis - Diagnostic Tool dunng Transfonner
Factory Tests - A bhay Agrawal
(ix)
77
88
111
116
125
137
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13. Testing ofTransfonners for Transferred Surge - A Key Tool
for Verifying Design and Manufacturing - Y. V. Joshi
INSTALLATION, OPERATION AND MAINTENANCE
14.
15.
16.
17.
18.
19
Operational Problems of Power Transfonners in Northern Grid -
K.K. Arya and Vikram Singh
765/400 kV Power Transfonners - Operational Experiences - s.K.
Mishra, P C.Sastry and S. Suresh
Operational Experience of 400 kV Class Auto-Transfonners in
POWERGRID System - R.C Yadav, CS.Sarkar, VK. Bhaskar and Gunjan
Agrawal
Installation Do's and Don'ts, Procedures and Site Drying -
Ranjan Joseph
Modern Trends in Application, Installation, Operation &
Maintenance - Bhaskar Sharma, A. K. Arora and Pradeep Kumar
Maintenance ofInsulation System in Transfonners - Paper and Oil
- u.c. Patel and Alka Shah
DIAGNOSTIC & FIELD TESTING
20.
21.
22.
23.
24.
Sweep Frequency Response Analysis (SFRA) - Recent International
Field Experiences - Simon Ryder
Eliminating Interference during Field Testing of Power
Transfonner Insulation - Oleh W Iwanusiw
Technical Aspects Related to Testing ofSF6 to Oil Bushing &
EHV Cable Tennination for Large Power Transfonners - D. Maheswaran,
Geetha Hariharan and S. Arthanari
Partial Discharge Detection in Power Transfonner by Acoustic
Emission Technique - Case Study - Shailesh Patel, Dipak Zala and
R.B. Desai
Online Assessment of Transfonner Bushing Insulation - Robert C.
Brusetti and Mohan Watwe
25. Advanced DSP Methods Applied for Pattern Recognition of PD
in Transfonner - Imteyaz Siddiqui, A. Kraetge, Kay Rethmeier and
Manish Gupta
(x)
143
151
158
168
In
188
204
215
225
232
244
251
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26.
27.
Worldwide Standardization Process of SFRA and Case studies -
Aradhana Ray. Sridhar Shenoy and Charles Sweetser
Partial Discharge Detection and Location in Power Transformers
using the UHF Technique - D. Templeton, Robert Brinzer, Sudhanshu
Gupta and MD. Judd
CONDITION MONITORING
28. Application of Dissolved Gas Analysis for Monitoring Oil
Filled Bushing Condition
29.
30.
- B. Pahlavanpour
On-line Partial Discharge Diagnosis at Power Transformers - S.
Markalous. M Boltze and A. Bolliger
Dielectric Frequency Response Measurements for Condition
Assessment of Power Transformers - Peter Werelius and Matz
Ohlen
31. Moisture and Dielectric Properties Analysis of Power
Transformer by DIRANA Measurement
32.
33.
34.
- Aradhana Ray. Sridhar Shenoy. as. Papneja and Maik Koch
Transformer Condition Assessment is becoming a Strategic Tool
for Utilities - Lars Pettersson. Lena Melzer and Kjell
Carrander
Bushing Diagnostics by PPD+FDS Method - Sridhar Shenoy. Aradhana
Ray and Charles Sweetser
Enhancing Reliability and Life Span of Transformer through
Innovative Condition Monitoring Techniques - Jyoti Shrivastava and
CM Shrivastava
FAILURE ANALYSIS
35.
36.
Towards Reliable Power Transformers Learning from Experience -
Mohan Watwe
Functional Reliability of on Load Tap Changers - Anand Khanna
and D. Krishna Iyer
37. A Case Study of Repeated Failure of Generator Transformer of
URI Power Station in the Year 2004 - Nain Singh. Ratish Kumar and
1. Chaudhary
(xi)
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299
307
320
333
345
360
368
383
392
401
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38.
39.
Phenomena ofHtgh Circulating Current in Delta Winding in a Bank
of Three I-Phase Auto Transformers: Case Study - K. G Krishnan, D.
Varyani, S. K. Mahajan, J S. Kuntia, G Chakladher
and R. K. Tiwari
Case Studies on Failure Analysis of Distribution Transformers at
Indira Gandhi Centre for Atomic Research, DAE, Kalpakkam - L.
Subrarnanyarn, N. Djearadjane, T. V Shanrnugasundararn,
A. Jyothish kurnar and YC Manjunatha.
Sponsors' ProfLIe
(xii)
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