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Transformer Tutorial
November 10, 2016 @ 8:00 am - 5:00 pm
Session 1 & 2:
Presentation 1: Preparation of Transformer Specification
- Ratings
- Single phase vs Three phase
- Winding Connections
- Vector Group
- Insulation Levels
- Terminals
- Accessories
- Types of Cooling
- Sound Levels
- Tap Range and location
- Taps in Auto-Transformer
- Items to consider for Taps
- Tap Changer Application
- Tap Changer Types
- Impedance
- Loss Evaluation
- Over-Excitation
- Short-Circuit Requirement
- Short-Circuit Withstand
- Special requirements
- Overloads
- Implications of Overloads
- Parallel Operation
- Rating Plate/Name Plate
- Alternatives
- Ambiguity in specification
- Over specifying
- Data Sheets
- Tests
- Tender Review
- Design Review
- Transportation
- Globalization
Session 2&3:
Presentation 2: Fundamentals of Auto Transformer Design
- Fundamental/co-ratio
- Advantage/disadvantage of auto Tx
- Tap changers
- Electrical Location
- Geometrical location
- Types of taps
- Operation
- Function
- Types of Connection
- Electrical Connection
- Standards for Auto Transformer
- Physical location of only DTC Tap windings
- Advantage/disadvantage
- Dielectric challenges
- Short Circuit challenges
- Thermal challenges
- Physical location of only LTC Tap windings
- Advantage/disadvantage
- Dielectric challenges
- Short Circuit challenges
- Thermal challenges
- Physical location of both DTC and LTC Tap windings
- Advantage/disadvantage
- Dielectric challenges
- Short Circuit challenges
- Thermal challenges
- Impedance variation due to geometric location of tap windings
- Different type of tap windings (Taped Helix, Multi-start..etc) and their impact in design
- Non-Linear Devices
- Series Transformer/Reactor when needed
- Different type of Tertiary loading and their impacts in auto design
- Over load for auto
- Testing of auto
- Pictures of a 450 MVA 345 kV auto and explanation of mechanical challenges
Session 4:
Presentation #3: Phase Shifting Transformer Fundamentals
- PST Transformer Fundamentals
- Symmetrical/Asymmetrical
- Quadrature/Non-Quadrature
- Single Core
- Two-Core
- Limitations of OLTC
- Testing
- Manufacturing Points
- Recent Developments
- Phase Shifting Transformers (PST) Applications
- Power Flow Control in Today’s Deregulated Power System Market
- Parallel Transmission Paths Owned or Operated by Different Entities
- PSTs Are More Economical and Reliable Than FACTS Devices
- Unique Designs and Construction
- PST Cost Tradeoffs
Speaker(s): Ronnie Minhaz, P.Eng.,
Agenda:
08:00-09:45 am: Preparation of Transformer Specification
09:45-10:00 am: Coffee Break
10:00-12:00 am: Preparation of Transformer Specification/Fundamentals of Auto Transformer Design
12:00-01:00 pm: Lunch break
01:00-2:30 pm: Fundamentals of Auto Transformer Design
02:30-02:45 pm: Coffee Break
02:45-04:30 pm: Phase Shifting Transformer Fundamentals
04:30-05:00 pm: Q&A
Location:
Bldg: Fairfield Inn & Suites Brunswick Freeport
36 Old Portland Rd
Brunswick, Maine
04011