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Books > Professional & Technical > Energy technology & engineering > Electrical engineering > Power networks, systems, stations & plants
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Providing Reliable Operation of Electric Networks (Hardcover)
Loot Price: R4,818
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Providing Reliable Operation of Electric Networks (Hardcover)
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This book presents theoretical and practical aspects of providing
reliable electrical network operation by 6 500 V voltage. The
topics covered includes semiconductor systems for de-icing overhead
transmission lines, dispatching solutions in power systems by
expert systems, partial discharge diagnostics, electrodynamic
testing of reactors, an investigation of technological breakdowns
with damage to power transformers, perspectives for using
photothyristors, IGCT and IGBT for electrodynamic, programmable
static converters for intelligent electrical networks, and digital
current transformers for digital substations. Chapter 1 describes
the serious problem of glacial deposits on overhead transmission
lines during the autumn-winter period. One of the methods to combat
this is melting the glacial deposits on alternating current lines
by creating short circuits, or direct currents using uncontrolled
or controlled rectifier blocks. Chapter 2 discusses the expansion
of the Automatic Dispatch Control System for substations and
electrical networks using intelligent subsystems based on the
technology of expert systems. Chapter 3 presents an application's
experience with monitoring the electric activity of the partial
discharges into the insulation of transformers, data on electrical
tests in autotransformer windings, and testing XLPE cables. Chapter
4 shows the thermal and electrodynamic tests of reactors on the
reliability and durability of windings during the passage of
short-circuit currents, serving as a tool for improving the
reliability of their design. Chapter 5 investigates a technological
breakdown with damage to power transformers, which is a difficult
task, and is performed to improve the reliability of the power
supply. Chapter 6 shows diagnostic and mathematical models of the
windings of the high-voltage transformers and reactors.
Mathematical models of winding radial and axial deformations are
also calculated. Chapter 7 provides the comparative characteristics
of switching capabilities of photothyristors, lockable thyristors
IGCT, and high-power transistors IGBT, taking into account the
specific operating conditions in the composition of the
high-voltage high-current semiconductor key (HHCSK) during
electrodynamic tests. In Chapter 8, the author considers the basic
operations of implicative algebra for the choice of the
logical-algebraic modeling of static converters, provided that the
objective and predicate variables are identified with the
parameters of the energy and information processes. Chapter 9
presents controlled reactor-transformers with reduced high current
harmonics and the calculation of parameters of the active parts of
transformers. Finally, chapter 10 presents the results of designing
a device for calculating the current on digital current
transformers, based on the Faraday Effect. This book is based on
the authors previous research, including more than 240 scientific
and technical publications.
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