HV Motors and Transformers: Design, Operations and Trouble-Shooting
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HV Motors and Transformers: Design, Operations and Trouble-Shooting Course
Introduction:
In 1882, Sir Thomas Edison constructed the world's inaugural electricity generating station in New York, marking the beginning of a rapid global expansion in electrical power supply. Today, more than a century later, the utilization of electrical energy has become ubiquitous. The transmission of electricity from generating sources involves the integration of numerous components and sub-systems. When these components are interconnected to supply different types and levels of electrical loads, it is commonly referred to as a network.
This course focuses on the behavior of High Voltage (HV) Networks and the testing and maintenance of one of their primary components: Power Transformers. The course delves into voltage levels reaching up to 400kV, providing comprehensive insights into the functioning and management of such networks.
Course Objectives:
- Develop existing knowledge of HV Systems and their components including Power Transformers and Motors
- Understand and apply Regulations for Safe Working on HV Apparatus and Systems
- Study the requirements for Operation and Maintenance of HV Systems and Components
- Latest Developments in HV Technology.
Who Should Attend?
The course is designed for Engineers and Technicians who are responsible for the:- Design, Operation, and Maintenance of HV Networks including Power Transformers and Motors who may require to refresh their knowledge and acquaint themselves with the latest developments in the technology.
Course Outlines:
- Revision of Electrical Fundamentals
- Exercises
- Revision of Power Transformer Fundamentals
- Revision of Motor Fundamentals
- The Institute of Electrical Engineers (IEE) and introduction to publications and electrical supply information
- HV Regulations and the working environment
- Case Studies and Exercises
- Review of Health and Safety
- Regulations for HV Equipment and Systems
- Basic Insulation Principles and Problems
- Review of HV and EHV Power system Components and Selection
- Overhead Lines
- Underground Cables
- Circuit Breakers
- Disconnectors
- Ring Main Units
- Power Transformers
- Metering Transformers
- Exercises
- Principles of Grounding and Induced Voltages
- Case Studies and Exercises
- Insulation in HV and Extra High Voltage (EHV) Systems
- Causes of Fault Conditions on Apparatus and Systems
- External Causes
- Internal Causes
- Types of Power Transformers
- Core Types
- Single-phase
- Three-phase
- Phase Relationships – Phasor Circuits
- Delta/Star and Star/Delta
- Star/Star
- Interconnected-Star Connection
- The Autotransformer
- Volts per Turn and Flux Density
- Tapping’s
- Impedance
- Multi-Winding Transformers including Tertiary Windings
- Dielectrics
- Core Steel
- Winding Conductors
- Insulation
- Transformer Oil and other dielectric liquids
- Exercises and Case Studies
- Large HV Induction Motors (3.3kV to 11 kV)
- Construction
- Vertical High Thrust and Submersible
- Ratings
- Rated Voltage
- Rated Starting Current
- Effective Reactance, Xm
- Continuous Current, Measurements and Calculations
- Horsepower
- Rated Frequency and “slip” (AC only)
- Rotational Speed (RPM)
- Transformer and Other types of Starters
- Variable Speed Drives
- Testing and Diagnostic Software
- Fault Finding
- Maintenance
- Mechanical Considerations and Balancing Large Synchronous Motors
- The reasons for employment.
- Utilization
- Construction – an Overview
- Field Control Systems – AVR’s
- Testing and Diagnostic Software
- Special maintenance requirements
- Case Studies and Exercises
- Transformer Testing
- Transformer Outages for Testing and Maintenance
- Network Security Considerations
- Safety Considerations
- Isolation Principles
- Switching Co-ordination
- Planned and Unplanned Switching
- The Permit to Work System – Why is it necessary? –