cigre liason reportr1 ieee munich 031813...
TRANSCRIPT
CWG/9416P Page 11
CONSEIL INTERNATIONAL DES GRANDS RESEAUX ELECTRIQUES INTERNATIONAL COUNCIL ON LARGE ELECTRIC SYSTEMS
STUDY COMMITTEE A2 TRANSFORMERS
Update on CIGRE activitieson Power Transformers
IEEE Munich Meeting 031813
Raj Ahuja
CWG/9416P Page 22
The Transformer Committee (SC A2)
Scope : Design, construction, manufacture and operation for all kinds of power transformers, including industrial , DC converters and phase-shift transformers and for all types of reactors and transformer components (bushing, tap-changer…)
In the past ( known as SC12 ) activities were focussed on design problems related to the rapid increase of rated voltage and power
Today, the two Strategic Directions for A2 future activities are :• Services to Customers ( Reliability, Life management,
Economics, Tutorials, ...)• Technology Issues (Safety, New technologies and New
concepts, Electrical environment, Pre-standardisation work, ...)
Chairman: Claude Rajotte (CA)Secretary: Patrick Picher (CA)
CWG/9416P Page 33
Design, manufacturing &
testing
Specifications, procurement &
economics
Operation, reliability, safety & environment
Maintenance, diagnostics, monitoring,
& repair
Life cycle
Tran
sfor
mer
tech
nolo
gyTransform
er utilisation
SC A2 Key domains
CWG/9416P Page 44
Present SC A2 Activities
• 24 regular members• 19 observer members• 9 WG's and 3 JWG's • 272 experts from 39 countries• 5 AG’s
CWG/9416P Page 55
A2 USNC Member – Raj Ahuja ( SPX Transformers Inc.)
Scope : Design, construction, manufacture and operation for all kinds of power transformers, including industrial , DC converters and phase-shift transformers and for all types of reactors and transformer components (bushing, tap-changer…)
In the past ( known as SC12 ) activities were focussed on design problems related to the rapid increase of rated voltage and power
Today, the two Strategic Directions for A2 future activities are :• Services to Customers ( Reliability, Life management,
Economics, Tutorials, ...)• Technology Issues (Safety, New technologies and New
concepts, Electrical environment, Pre-standardisation work, ...)
Chairman: Claude Rajotte (CA)Secretary: Patrick Picher (CA)
CWG/9416P Page 66
Present SC A2 Working Groups
WG A2-33: Fire Safety – Published in Dec 2012WG A2-36: Guide for Transformer ProcurementWG A2-37: Transformer Reliability SurveyWG A2-38: Transformer Thermal ModellingWG A2.40: Copper sulphide long-term mitigation and
risk assessmentWG A2.42: Guide on transformer TransportationWG A2.43: Transformer bushings reliabilityWG A2.44: Transformer Intelligent Condition
MonitoringWG A2.45: Transformer Failure Investigation and
post-mortem AnalysisJWG A2/C4.39: Electrical Transient Interaction between
transformers and the Power SystemJWG A2/D1.41: Oil conductivity under DC conditionJWG A2/D1.46: Field experience with transformer solid
insulating ageing markers
CWG/9416P Page 77
Present SC A2 Working Groups
WG A2-33 -Fire Safety (A. Petersen/AU)Guide approved for Publishing in Nov. 2012
- Avoidance of tank rupture- Precaution to fire victim- Precautions to fire origin
WG A2-36 Guide for Transformer ProcurementGuide approved for Publishing in Nov. 2012
(T. Breckenbridge / UK)- Capability assessment of transformer
manufacturers- Evaluation of technical competence and
experience- Review and update of the existing CIGRE A2
documents on procurement
CWG/9416P Page 88
Present SC A2 Working Groups
WG A2-37 Transformer Reliability Survey(S. Tenbohlen/DE)
• Review all existing national surveys and study different practices ; identify best practices
• Compile and present the information available in these national survey reports
• Make recommendations to improve the situation
WG A2-38 Transformer Thermal Modelling (J. Lapworth/UK)
• Describe the state of the art techniques in transformer thermal modelling to evaluate winding hottest spot as well as hot spots on other metallic parts
• Examples of application of hottest spot direct measurement and best practices
• Recommendation for improvement of standards
CWG/9416P Page 99
JWG A2/C4.39 - Electrical Transient Interaction between transformers and the Power System(A.Rocha/BR)
- Assess and discuss the different types of electrical transient interaction
- Discuss the general increase in transformer dielectric failures in the system.
WG A2.40 - Copper sulphide long-term mitigation and risk assessment(J. Lukic/RS)
- Method, tools and diagnostic- Metal passivator stability and efficiency- Efficiency of existing on-site oil treatment
Present SC A2 Working Groups
CWG/9416P Page 1010
WG A2.42 - Guide on transformer Transportation (A. Mjelve/NO)- Typical conditions/forces during transport- Specifications and design review- Requirements on transportation issues
JWG A2/D1.41 - Oil conductivity under DC condition (A. Küchler/DE)
- Started under recommendation of WG A2/B4.28
- Review techniques and standards for measurement of conductivity of liquids
- Suggestions for new standards
Present SC A2 Working Groups
CWG/9416P Page 1111
WG A2.44 – Transformer IntelligentCondition Monitoring (C. Dupont/BR)- Conversion of data to relevant info.- Demonstration of benefits- Hardware/software/data integration
WG A2.43 Transformer bushings reliability (A. Mikulecky/HR)
• Bushing failure definition • Failure mechanisms for OIP, RBP, RIP• Bushings failure rate • Predicted life time, maintenance,
diagnostic
-20
-10
0
10
20
30
40
-0,1
-0,05
0
0,05
0,1
0,15
0,2
-10 -5 0 5 10 15 20
Rai
n cu
mul
ativ
e (m
m)
∆Tgδ (%)
Time (hours relative to 2008:05:29-0H00 local time)
Present SC A2 Working Groups
CWG/9416P Page 1212
JWG A2/D1.46: Field experience with transformer solid insulating ageing markers (R. Mertens/BE)- Field cases: correlation between chemical markers
and DP- Design information relevant to ageing markers
models- Consideration of operation and maintenance records- Influence of oil sampling conditions (ex: temperature)
WG A2.45: Transformer Failure Investigation and post-mortem Analysis (C. Kuen/AT)- Important information to collect- Availability and significance of design data- Documentation during the dismounting - Paper sampling: how, where, precautions
Present SC A2 Working Groups
CWG/9416P Page 1313
Recent Brochures & Future activities
Shunt Reactor – Started in Jan. 2013Transformer health indexSpare transformer policyEfficient and eco-design transformersExperience with utilisation of transformers in FACTs
Recent Brochures Ref YearHVDC Tr. – Test, ageing, reliability in service 406 2010HVDC Tr. – Guidelines for design review 407 2010Experience in service with new insulating liquids 436 2010Guide on Transformer Maintenance 445 2011Guide on Transformer Safety Practices 2012
Future Activities:
CWG/9416P Page 1414
Recent/Future SC A2 Sessions & Colloquium
Paris 2012 Preferential Subjects
Colloquium 9/8 – 9/14/ 2013: Zurich, Switzerland Joint Colloquium A2/C4- Interaction between transformer and the Power
System- Experience with the use of Phase-Shifting
transformers- Network planning in the context of an ageing
transformer fleet
- Transformer for the network of the future - Transformer Eco design / Eco use- Transformer magnetic circuit
CWG/9416P Page 1515
45th CIGRE Session 8/24 -8/29/2014 in Paris
PS1 > Best practices for asset management: Health index as a tool for condition assessment and applications of transformer fleet ranking by condition and criticality. PS2 > Transformers for specialized applications: Application of phase-shifting, converter, industrial and offshore/sub seatransformers, variable shunt reactors and other specialized designs. PS3 > Field experience with the use of non-conventionalmaterials and technologies: Transformer experience with alternative insulating liquids, gas and solids, improved winding and core material and technologies. Experience with new technologies for components. High-Temperature Superconducting (HTS) transformer experience and applications.
Call For Papers:Synopsis for Technical Papers: 4/5/13Approval of Synopsis: 9/10/13Submit Final Paper : 1/10/14
CWG/9416P Page 1616
Thank you for your attention
www.cigre-a2.org