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Title: Self-Excitation and Harmonics in Wind Power Generation

Abstract

Traditional wind turbines are commonly equipped with induction generators because they are inexpensive, rugged, and require very little maintenance. Unfortunately, induction generators require reactive power from the grid to operate; capacitor compensation is often used. Because the level of required reactive power varies with the output power, the capacitor compensation must be adjusted as the output power varies. The interactions among the wind turbine, the power network, and the capacitor compensation are important aspects of wind generation that may result in self-excitation and higher harmonic content in the output current. This paper examines the factors that control these phenomena and gives some guidelines on how they can be controlled or eliminated.

Authors:
; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
947419
DOE Contract Number:
AC36-99-GO10337
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solar Energy Engineering: Transactions of the American Society of Mechanical Engineers; Journal Volume: 127; Journal Issue: November 2005
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; CAPACITORS; HARMONICS; INDUCTION GENERATORS; MAINTENANCE; RECOMMENDATIONS; WIND POWER; WIND TURBINES; Wind Energy

Citation Formats

Muljadi, E., Butterfield, C. P., Romanowitz, H., and Yinger, R.. Self-Excitation and Harmonics in Wind Power Generation. United States: N. p., 2005. Web. doi:10.1115/1.2047590.
Muljadi, E., Butterfield, C. P., Romanowitz, H., & Yinger, R.. Self-Excitation and Harmonics in Wind Power Generation. United States. doi:10.1115/1.2047590.
Muljadi, E., Butterfield, C. P., Romanowitz, H., and Yinger, R.. 2005. "Self-Excitation and Harmonics in Wind Power Generation". United States. doi:10.1115/1.2047590.
@article{osti_947419,
title = {Self-Excitation and Harmonics in Wind Power Generation},
author = {Muljadi, E. and Butterfield, C. P. and Romanowitz, H. and Yinger, R.},
abstractNote = {Traditional wind turbines are commonly equipped with induction generators because they are inexpensive, rugged, and require very little maintenance. Unfortunately, induction generators require reactive power from the grid to operate; capacitor compensation is often used. Because the level of required reactive power varies with the output power, the capacitor compensation must be adjusted as the output power varies. The interactions among the wind turbine, the power network, and the capacitor compensation are important aspects of wind generation that may result in self-excitation and higher harmonic content in the output current. This paper examines the factors that control these phenomena and gives some guidelines on how they can be controlled or eliminated.},
doi = {10.1115/1.2047590},
journal = {Journal of Solar Energy Engineering: Transactions of the American Society of Mechanical Engineers},
number = November 2005,
volume = 127,
place = {United States},
year = 2005,
month =
}
  • Traditional wind turbines are equipped with induction generators. Induction generators are preferred because they are inexpensive, rugged, and require very little maintenance. Unfortunately, induction generators require reactive power from the grid to operate. Because reactive power varies with the output power, the terminal voltage at the generator may become too low to compensate the induction generator. The interactions among the wind turbine, the power network, and the capacitor compensation, are important aspects of wind generation. In this paper, we will show the interactions among the induction generator, capacitor compensation, power system network, and magnetic saturations and examine the cause ofmore » resonance conditions and self-excitation.« less
  • The transient behavior of a wind-driven induction generator after its disconnection from the power grid is investigated. Measurements on an experimental arrangement, followed by theoretical analysis, show that self-excitation occurs always when torque applies and the generator is compensated. In a wide range of compensation power the self-excitation voltage does not change significantly. Suggestions for protection against self-excitation are made.
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