Course Details
Subject {L-T-P / C} : EE6205 : Extra High Voltage Transmission { 3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Subrata Karmakar
Syllabus
Module-I: Introduction to EHV AC Transmission: Role of EHV AC Transmission, Brief Description of Energy Sources, Transmission Line Trends and Preliminaries: Standard Transmission Voltages, Average Values of Line Parameters, Power-Handling Capacity and Line Loss, Mechanical Considerations in Line Performance. (10 Hrs)
Module-II: Calculation of Line and Ground Parameters: Resistance of Conductors, Current-Carrying Capacity, Properties of Bundled Conductors, Inductance of EHV Line Configurations, Line Capacitance Calculation, Sequence Inductances and Capacitances, Resistance and Inductance of Ground Return. (6 Hrs)
Module-III: Voltage Gradients of Conductors: Electrostatics, Field of Sphere Gap, Charge-Potential Relations for Multi-Conductor lines, Surface Voltage Gradient on Conductors, Distribution of Voltage Gradient on Sub-conductors of Bundle, Design of Cylindrical Cages for Corona. (6 Hrs)
Module-IV: Power-Frequency Voltage Control and Over voltages: Problems at Power Frequency, No-Load Voltage Conditions and Charging Current, Power Circle Diagram, Voltage Control Using Synchronous Condensers, Cascade Connection of Components—Shunt and Series Compensation, Capacitor Compensated Lines, Static Reactive Compensating Systems (Static VAR), High Phase Order Transmission. (8 Hrs)
Module-V: Extra High Voltage Cable Transmission: Electrical Characteristics of EHV Cables, Design of Cable Insulation, Tests on Cable Characteristics, Gas Insulated EHV Lines. (6 Hrs)
Course Objectives
- To learn about the recent trends in EHV AC Transmission, calculate the value of Line Inductance and Capacitance of EHV transmission line..
- To understand the concept of voltage gradients of conductors, Power-frequency voltage control and over voltages of EHV transmission line.
- To learn about the extra high voltage cable transmission and high voltage test technique
- The course also serves as an introduction to Gas insulated systems.
Course Outcomes
On completion of the course, the students will be able to <br /> <br />CO1. Learn the basic concepts of Extra High Voltage Transmission. <br />CO2. Know about the Transmission line parameters and Properties of Bundled Conductors. <br />CO3. Calculate Line inductance and capacitances of bundled conductors. <br />CO4. Explore and calculate electrostatic field and voltage gradient of EHV bundled conductors <br />CO5. Understand and analyze compensated devices for power frequency voltage control. <br />CO6. Understand the extra high voltage cable and gas insulated transmission.
Essential Reading
- M. G. Dwek, EHV Transmission, Elsevier Sc., , 1991
- K.R. Padiya, HVDC transmission systems, Wiley Eastern Ltd. , New Delhi, 1992
Supplementary Reading
- J. P. Holtzhausen, W L Vosloo, High Voltage Engineering Practice and Theory, CRC Press, 2 edition , 2000
- Andrew R. Hilema, Insulation Coordination for Power Systems, CRC Press , 1999