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Design and Control of Matrix Converters - Regulated 3-Phase Power Supply and Voltage Sag Mitigation for Linear Loads (Hardcover, 1st ed. 2017)
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Design and Control of Matrix Converters - Regulated 3-Phase Power Supply and Voltage Sag Mitigation for Linear Loads (Hardcover, 1st ed. 2017)
Series: Energy Systems in Electrical Engineering
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This book describes two target applications for synchronous
systems: regulated 3-phase voltage supply and voltage sag
mitigation. It presents a detailed design procedure for converter
switches and filters considering all steady-state, commutation and
dynamic requirements. This work has evolved from previously
published research by the authors, which in turn is part of a
larger effort to expand the application domain of matrix converters
to power systems. The objectives of the work have been categorized
into the following: developing a dynamic model that provides
adequate design insights; designing filters; and devising a control
scheme. The low frequency dynamic model is first analyzed for
regulated voltage supplies assuming balanced system. The system is
modeled relative to a synchronous rotating (dq) frame linearized
around an operating point. The input-output variables are related
by non-diagonal transfer function matrices. Individual transfer
function sub-matrices are sequentially investigated and it is shown
that, depending on the input power, input voltage and filter
parameters, the appearance of a set of right half zeros is
possible. The book then considers filter design, as well as general
issues like ripple attenuation, regulation, reactive current
loading, and filter losses. The book also addresses additional
constraints that may be imposed by dynamic requirements and
commutation. In the third stage, voltage controller design is
detailed for a 3-phase regulated voltage supply. In dq domain,
output voltage control represents a multivariable control problem.
This is reduced to a single variable control problem while
retaining all possible right half zeros, thereby preserving the
internal stability of the system. Consequently, the standard single
variable control design technique has been used to design a
controller. The analytically predicted dynamic response has been
verified by experimental results. It was possible to operate the
system beyond the critical power boundary where the right half
zeros emerge. Lastly, the developed control approach has been
extended to voltage sag mitigation with adequate modifications. A
3-wire linear load and both symmetrical and asymmetrical voltage
sags have been considered. Experimentally obtained response time
for sag mitigation was found to be less than the power supply
holdup time of most of the sensitive equipment. This book will be
useful to both researchers and graduate students.
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