OPTIMIZED DESIGN OF VARIABLE-SPEED DRIVES
AND ELECTRICAL NETWORKS BASED ON NUMERICAL SIMULATION
J.-J.Simond, B.Kawkabani, A.Sapin, P.Allenbach
Swiss Federal Institute of Technology, Electrical Engineering Dept.,
tel: 4121 / 6934804, fax: 4121 / 6932687
The present paper describes the modelling and the prediction of the steady-state or transient behaviour
of different modern variable-speed drives and electrical networks. The necessity of a performant numerical
simulation tool in order to guarantee an optimized design is illustrated by examples based on existing large
variable-speed drives and power plants.
: variable speed drive, electrical network, converter, regulator, dynamic behaviour.
During the last few years the performances and
therefore the complexity of the variable-speed
drives as well as those of the modern power plants
have considerably increased. Consequently, an
optimized design of these equipments requires
suitable numerical simulation tools in order to
guarantee the feasibility and the performances of
such equipments in steady-state or transient
operation. More precisely, it is no more sufficient to
simulate separately the behaviour of the different
elements, even based on sophisticated models, it is
necessary to simulate globally all the system in
order to take into account all the possible
interactions which are often primordial for the
In a practical viewpoint a suitable simulation tool
should be able to consider all the elements used in a
complex system (machines, converters, load,
protection devices, filters, .
..) for any system
In this paper, the modelling of different existing
large industrial drives or electrical networks based
on modern technologies are described, including the
synchronous machine with 2x3 phase stator
winding. It is shown how the use of performant
simulation tools helps to reach an optimized design
Examples of applications.
All values are given in (p.u.).
12 pulse LCI-fed synchronous
12 pulse LCI-fed synchronous motor
21 MVA, 2x3.3 KV, 39.17 Hz, 2p = 10
ia1, ib1, ic1, uab1
steady-state operation, tmec = 0.9, n = 1.