Experimental evaluation of ride-through capabilities for a matrixconverter under short power interruptions
Klumpner, C.; Blaabjerg, F.
Industrial Electronics, IEEE Transactions on
Volume 49, Issue 2, Apr 2002 Page(s):315 - 324
Digital Object Identifier 10.1109/41.993264
Summary:The matrix converters, which are direct power electronic
converters, are able to provide important benefits such as bidirectional
power flow, sinusoidal input currents with adjustable displacement
angle, and a great potential for size reduction. Still, two major
disadvantages exist: a lower than unity voltage transfer ratio and high
sensitivity to power grid disturbances. Many solutions to provide
continuous operation of adjustable speed drives (ASDs) during power grid
disturbances have been proposed, but they are all applied to DC-link
ASD. In this paper, a new solution to provide limited ride-through
operation is presented with a matrix converter using a scalar controlled
induction motor for a duration of hundreds of milliseconds, without any
hardware modification. During the ride-through operation, the drive is
not able to develop torque or to control the motor flux. By recovering
the necessary power to feed the control hardware of the matrix
converter, it is able to keep the ASD operating. When normal grid
conditions are reestablished, the matrix converter is able to accelerate
the motor from nonzero speed and flux by initializing the modulator with
the estimated frequency and the initial angle of the reference output
voltage vector. The maximum duration of the ride-through operation
depends on the initial motor flux, speed level, rotor time constant,
load torque, and inertia. This method is verified on a laboratory setup
with a matrix converter
View citation and abstract |
Cart
