Transmission and Distribution

TRANSMISSION AND DISTRIBUTION

COURSE OBJECTIVES

To understand electric power transmission system.

To understand electric power distribution system.

Types and methods of power transmission and distribution.

To measure performance of transmission and distribution system.

UNIT 1 / STRUCTURE OF ELECTRIC POWER SYSTEM / 12 Hrs.
Single Line Diagram - Distributors with Concentrated and Uniform Loading - DC Two Wire and Three Wire Systems
- AC Distributors - Radial and Ring Distributors - Interconnectors - Electrical Layout & Bus Bar Arrangement in Generating
Sub Stations and Bulk Power Substation - Kelvin’s Law for the Design of Feeders and its Limitations.
UNIT 2 / TRANSMISSION LINE PARAMETERS / 12 Hrs.

Resistance, Inductance and Capacitance of Single Phase and Three Phase (Including Double Circuits) Transmission Lines - Stranded and Bundled Conductors - Symmetrical and Unsymmetrical Spacing - Transposition - Application of Self and Mutual GMD - Skin and Proximity Effect - Inductive Interference with Neighboring Circuits - Corona - Factors Affecting Corona - Advantages and Disadvantages of Corona - Methods of Reducing Corona Effect.

UNIT 3 PERFORMANCE OF TRANSMISSION LINES 12 Hrs.

Equivalent Circuits for Short, Medium (π and T circuits) and Long Lines - Efficiency and Regulation - Attenuation Constant, Phase Constant, Surge Impedance and Surge Impedance Loading - Real and Reactive Power Flows in Lines - Power Circle Diagrams for Receiving and Sending Ends - Voltage Control of Lines - Ferranti Effect

UNIT 4 INSULATORS, CABLES AND OVERHEAD LINES 12 Hrs.

Insulators - Types and Construction - Voltage Distribution in String Insulator - string Efficiency - Methods of Improving String Efficiency - Cables - types - Capacitance of Cables - Insulation Resistance - Dielectric Stress and Grading - Dielectric Loss - Thermal Characteristics - capacitance of Three Core Cables - Stress and Sag Calculations - Effect of Wind and Ice - Supports at Different Levels - stinging Chart.

UNIT 5 RECENT TRENDS IN TRANSMISSION 12 Hrs.

Extra High Voltage AC (EHVAC) Transmission - Need, Advantages, Limitations -High Voltage Direct current Transmission (HVDC) - Terminal Equipment for HVDC Systems - Classifications, Advantages, Limitations - Economic Distance for HVDC - Comparison of EHVAC and HVDC Transmission -Interconnection of HVDC & AC Systems - Introduction to FACTS Technology -SVC,TCSC,STATCOM ,UPFC.