EHV AC Transmission: Need of EHV transmission lines, power handling
capacity and surge impedance loading. Problems of EHV transmission, bundled
conductors: geometric mean radius of bundle, properties of bundle conductors.
Electrostatic fields of EHV lines and their effects, corona effects: Corona loss, audio and
radio noise.
Units: II
Load Frequency Control: Introduction to control of active and reactive power
flow, turbine speed governing system. Speed governing characteristic of generating unit and
load sharing between parallel operating generators. Method of Load Frequency Control:
Flat frequency, flat tie line and tie line load bias control. Automatic generation control
(description of block diagram only).
Units: III
Voltage Control: No load receiving end voltage and reactive power generation.
Methods of voltage control. Synchronous phase modifier, shunt capacitors and reactors,
saturable reactors, Thynstorised static VAR compensators- TCR, FC-TCR and TSCTCR.
Units: IV
FACTS: Introduction to FACTS controllers, types of FACTS controllers, Brief
description of STATCOM, Thyristor controlled series capacitors and unified power flow
controller.
Units: V
HVDC Transmission: Types of D.C. links, advantages and disadvantages of
HVDC transmission. Basic scheme and equipment of converter station. Ground return.
Basic principles of DC link control and basic converter control characteristics.
Application of HVDC transmission.