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Wireless Communications for Power Substations: RF Characterization and Modeling (Paperback, Softcover reprint of the original 1st ed. 2019)
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Wireless Communications for Power Substations: RF Characterization and Modeling (Paperback, Softcover reprint of the original 1st ed. 2019)
Series: Wireless Networks
Expected to ship within 10 - 15 working days
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This book consists of the identification, characterization, and
modeling of electromagnetic interferences in substations for the
deployment of wireless sensor networks. The authors present in
chapter 3 the measurement setup to record sequences of impulsive
noise samples in the ISM band of interest. The setup can measure
substation impulsive noise, in wide band, with enough samples per
time window and enough precision to allow a statistical study of
the noise. During the measurement campaign, the authors recorded
around 120 noise sequences in different substations and for four
ranges of equipment voltage, which are 25 kV, 230 kV, 315 kV and
735 kV. A characterization process is proposed, by which physical
characteristics of partial discharge can be measured in terms of
first- and second-order statistics. From the measurement campaign,
the authors infer the characteristics of substation impulsive noise
as a function of the substation equipment voltage, and can provide
representative parameters for the four voltage ranges and for
several existing impulsive noise models. The authors investigate in
chapters 4 and 5 the modeling of electromagnetic interferences
caused by partial discharge sources. First, the authors propose a
complete and coherent approach model that links physical
characteristics of high-voltage installations to the induced
radio-interference spectra of partial discharge sources. The
goodness-of-fit of the proposed physical model has been measured
based on some interesting statistical metrics. This allows one to
assess the effectiveness of the authors' approach in terms of
first- and second-order statistics. Chapter 6 proposes a model
based on statistical approach. Indeed, substation impulsive noise
is composed of correlated impulses, which would require models with
memory in order to replicate a similar correlation. Among different
models, we have configured a Partitioned Markov Chain (PMC) with 19
states (one state for the background noise and 18 states for the
impulse); this Markov-Gaussian model is able to generate impulsive
noise with correlated impulse samples. The correlation is
observable on the impulse duration and the power spectrum of the
impulses. Our PMC model provides characteristics that are more
similar to the characteristics of substation impulsive noise in
comparison with other models, in terms of time and frequency
response, as well as Probability Density Functions (PDF). Although
PMC represents reliably substation impulsive noise, the model
remains complex in terms of parameter estimation due to a large
number of Markov states, which can be an obstacle for future
wireless system design. In order to simplify the model, the authors
decrease the number of states to 7 by assigning one state to the
background noise and 6 states to the impulse and we call this model
PMC-6. PMC-6 can generate realistic impulses and can be easily
implemented in a receiver in order to mitigate substation impulsive
noise. Representative parameters are provided in order to replicate
substation impulsive noise for different voltage ranges (25-735
kV). Chapter 7, a generalized radio-noise model for substations is
proposed, in which there are many discharges sources that are
randomly distributed over space and time according to the Poisson
field of interferers approach. This allows for the identification
of some interesting statistical properties of moments, cumulants
and probability distributions. These can, in turn, be utilized in
signal processing algorithms for rapid partial discharge's
identification, localization, and impulsive noise mitigation
techniques in wireless communications in substations. The primary
audience for this book is the electrical and power engineering
industry, electricity providers and companies who are interested in
substation automation systems using wireless communication
technologies for smart grid applications. Researchers, engineers
and students studying and working in wireless communication will
also want to buy this book as a reference.
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