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Transformer Condition Assessment - Test Techniques to Diagnose Transformer Problems

Dates & Locations

Overview

Power Transformers are one of the most expensive and critical assets on the transmission network. It is vital that the utility take steps to protect their assets to ensure reliable operation of the power system.   If a fault occurs on the power system, what is the impact on the transformer? What factors cause the condition of the transformer to deteriorate? How do we diagnose these problems and assess the transformer’s condition. What can be done to extend the life of the transformer? This seminar is intended to address the above issues by adapting the best scientific and technical knowledge in a practical context – to provide the best possible tools and advice to maximize our ability to manage our transformer assets.

Download Course Outline

Course Outline

Module 1 – Transformer Stresses

  • Electrical Stresses
    • System transients and surges
    • Modeling (EMTP studies)
    • Insulation problems; partial discharges
  • Mechanical Stresses
    • Faults; core and winding damage
    • Loose windings

Thermal Stresses

  • Hotspots and Overheating
  • Thermal ageing
  • Impact on paper and oil

Moisture in Transformers

  • Moisture dynamics and implications
  • Preservation systems

Module 2 - Diagnosing Transformer Problems

  • Analytical Methods
    • Dissolved gas analysis and oil analysis
    • Furans
    • Moisture assessments
  • Conventional Methods
    • transformer loading and ratings
    • copper sulfate
    • noise monitoring
    • spill containment
  • Innovative techniques
    • frequency response analysis
    • vibration analysis
    • dielectric response methods
    • new technologie

Transformer Maintenance

  • Routine
  • Major maintenance; rewinding; oil processing
  • Internal inspections

Transformer Tripping Investigation & Analysis

  • Protection devices operated
  • Electrical test just after tripping
  • Oil DGA tests
  • Make decision to re-energize transformer or replace it
  • Associated components like power cables GIS and control & protection circuits

Who Should Attend

  • ​Engineers and Senior technicians responsible for transformer reliability and maintenance
  • Management responsible for transformer assets

Key Benefits

  • ​A practical guide to transformer inspections
  • Case Studies of specific incidents from participants – critique and analyze process
  • Upon completion of this course, attendees will be able to:
    • Describe, Identify, Select 
    • Safety requirements

Instructors

  • Noboru (Nobby) Fujimoto P. Eng


    Nobby Fujimoto is an electrical engineer with more than 25 years of experience with power system apparatus.​

  • Ali Naderian


    Ali is an expert in transformers, high voltage engineering  and electrical cables.

Contact Training


Training Locations

  • Toronto

    800 Kipling Ave., Unit 2
    Toronto, Ontario, M8Z 5G5

    Map


    416-207-6000

    416-207-6532


  • Cincinnati

    7251 E. Kemper Road,
    Cincinnati, Ohio, 45249

    Map


    513-247-9039