Power Quality Aspects in a Wind Power Plant: Preprint Page: 3 of 11
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POWER QUALITY ASPECTS IN A WIND POWER PLANT
E. Muljadi' C.P. Butterfield' J. Chacon2
'National Renewable Energy Laboratory 2 Southern California Edison
1617 Cole Blvd. P.O. Box 800
Golden, CO 80401 Rosemead, CA 91770
Abstract- Like conventional power plants, wind power system
power plants must provide the power quality compensation,
required to ensure the stability and reliability of the
power system it is connected to and to satisfy the
customers connected to the same grid. When wind In the past 3(
energy development began, wind power plants were increased sig
very small, ranging in size from under one megawatt California, the
to tens megawatts with less than 100 turbines in each surpassed the c
plant. Thus, the impact of wind power plant on the was designed.
grid was very small, and any disturbance within or small, scattere
created by the plant was considered to be in the noise wind plants
level. governing win
In the past 30 years, the size of wind turbines and encourage deve
the size of wind power plants have increased turbines were
significantly. Notably, in Tehachapi, California, the compensation
amount of wind power generation has surpassed the reactive power
infrastructure for which it was designed. At the same generation incr
time, the lack of rules, standards, and regulations regulations dur
during early wind development has proven to be an be an increasin
increasing threat to the stability and power quality of of the interconn
the grid connected to a wind power plant. Although
Fortunately, many new wind power plants are power plant op
equipped with state of the art technology, which quality. Becau
enables them to provide good service while producing grid, it is very
clean power for the grid. The advances in power disturbances th
electronics have allowed many power system voltage and fre
applications to become more flexible and to therefore, volt
accomplish smoother regulation. Applications such harmonics will
as reactive power compensation, static transfer excitation, whi
switches, energy storage, and variable-speed to loss of line,
generations are commonly found in modern wind Section II
power plants. variations, and
Although many operational aspects affect wind turbines repres
power plant operation, this paper, focuses on power and self-excitat
quality. Because a wind power plant is connected to We used Po
the grid, it is very important to understand the (PSSET') from
sources of disturbances that affect the power quality. Visual Simulati
In general, the voltage and frequency must be kept as
stable as possible. The voltage and current II. VOLT
distortions created by harmonics will also be A. Overview
discussed in this paper as will self-excitation, which
may occur in a wind power plant due to loss of line. This section
wind power pla
Index Terms-wind turbine, wind farm, wind power power system
. network used
plant, power quality, wind energy, aggregation, diagram from
1H. Romanowitz3
3) Oak Creek Energy Systems Inc.
14633 Willow Springs Rd.
Mojave, CA 93501s, renewable energy, reactive power
self-excitation, harmonics.
I. INTRODUCTION
years, the size of wind power plants has
nificantly. Notably, in Tehachapi,
amount of wind power generation has
apability of the infrastructure for which it
The infrastructure was built to support
d wind generation. Similarly, because
were so small in the past, the rules
d generation were more relaxed to
lopment. For example, in the past, wind
only required to have capacitor
at each turbine to satisfy the no-load
generation. But as the amount of wind
eases, the lack of rules, standards, and
ing early wind development has proven to
g threat to the stability and power quality
ected grid.
many operational aspects affect wind
eration, in this paper, we focus on power
se a wind power plant is connected to the
important to understand the sources of
at affect its power quality. In general, the
quency must be kept as stable as possible;
age and current distortions created by
also be discussed in this paper. Self-
ch may occur in a wind power plant due
will also be presented.
describes the voltage and frequency
Section III discusses single and multiple
entation. Section IV presents harmonics
ion, and Section V presents the summary.
wer Systems Simulation for Engineers
Siemens Power Technologies Inc., and
on (Vissim) from Visual Solution Inc.
AGE AND FREQUENCY VARIATIONS
describes the interaction between the
nt, reactive power compensation, and the
network. The Tehachapi power system
n this study is based on a power system
1999 [1]. Thus, the simulation results
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Muljadi, E.; Butterfield, C. P.; Chacon, J. & Romanowitz, H. Power Quality Aspects in a Wind Power Plant: Preprint, article, January 1, 2006; Golden, Colorado. (https://digital.library.unt.edu/ark:/67531/metadc878686/m1/3/: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.