09-11-2012, 06:06 PM
IEEE Transactions on Power Apparatus and Systems,
[attachment=38852]
Abstract -
A simulation and digital computer modeling
effort is described in which a wind turbinegenerator
system is adapted for stability evaluation
using a large scale transient stability computer program.
Component models of the MOD-2 wind generator
system are described and their digital model equations
are provided. A versatile wind velocity model is
described, which provides the capability of simulating
a wide variety of wind variations, in addition to the
usual network disturbances. Computed results obtained
from runs of the enhanced stability program are provided
that illustrate the wind turbine-generator system
dynamic performance for changes in wind velocity.
INTRODUCTION
The purpose of the work described herein is to
provide the capability of simulating the dynamic performance
of the MOD-2 wind turbine-generator system
using a production transient stability program. The
MOD-2 model used for this purpose is that developed by
Purdue University and described in several publications
[1-4]. The model equations were adapted for digital
simulation, coded in Fortran, and installed into a
development version of the large-scale EPRI Transient-
Midterm Stability Program [5]. This program was
selected because of its modular design and public documentation.
The results of this effort confirm prior
analog computer studies of the MOD-2 behavior [2], and
provide a new study capability for utility engineers
who wish to evaluate the transient effects of wind
generators integrated into large scale power systems.
Control
The pitch control system provides integral control
of errors in hub speed or generated power, with a notch
filter introduced to reduce oscillations of twice the
rotational frequency, arising from wind shear phenomena,
blade teetering and nacelle yaw [6]. Appropriate
limiting of both pitch angle and rate-of-change are
incorporated. A mQde switch is devised to remove the
pitch angle control when the average wind speed is
below a nominal cut-off velocity.
The Wind Model
The wind model is one feature that is unique to
the wind turbine-generator system and is not required
for other generator systems in the stability program.
A model is required that can properly simulate the
spatial effect of wind behavior,'including gusting,
rapid (ramp) changes, and background noise.
CONCLUSIONS
The MOD-2 wind turbine generator model developed
by Purdue University has been adapted for digital
transient stability simulation using the EPRI stability
[attachment=38852]
Abstract -
A simulation and digital computer modeling
effort is described in which a wind turbinegenerator
system is adapted for stability evaluation
using a large scale transient stability computer program.
Component models of the MOD-2 wind generator
system are described and their digital model equations
are provided. A versatile wind velocity model is
described, which provides the capability of simulating
a wide variety of wind variations, in addition to the
usual network disturbances. Computed results obtained
from runs of the enhanced stability program are provided
that illustrate the wind turbine-generator system
dynamic performance for changes in wind velocity.
INTRODUCTION
The purpose of the work described herein is to
provide the capability of simulating the dynamic performance
of the MOD-2 wind turbine-generator system
using a production transient stability program. The
MOD-2 model used for this purpose is that developed by
Purdue University and described in several publications
[1-4]. The model equations were adapted for digital
simulation, coded in Fortran, and installed into a
development version of the large-scale EPRI Transient-
Midterm Stability Program [5]. This program was
selected because of its modular design and public documentation.
The results of this effort confirm prior
analog computer studies of the MOD-2 behavior [2], and
provide a new study capability for utility engineers
who wish to evaluate the transient effects of wind
generators integrated into large scale power systems.
Control
The pitch control system provides integral control
of errors in hub speed or generated power, with a notch
filter introduced to reduce oscillations of twice the
rotational frequency, arising from wind shear phenomena,
blade teetering and nacelle yaw [6]. Appropriate
limiting of both pitch angle and rate-of-change are
incorporated. A mQde switch is devised to remove the
pitch angle control when the average wind speed is
below a nominal cut-off velocity.
The Wind Model
The wind model is one feature that is unique to
the wind turbine-generator system and is not required
for other generator systems in the stability program.
A model is required that can properly simulate the
spatial effect of wind behavior,'including gusting,
rapid (ramp) changes, and background noise.
CONCLUSIONS
The MOD-2 wind turbine generator model developed
by Purdue University has been adapted for digital
transient stability simulation using the EPRI stability