TY - GEN
T1 - Time-frequency based power quality analysis of variable speed wind turbine generators
AU - Islam, Moinul
AU - Mohammadpour, Hossein Ali
AU - Stone, Philip
AU - Shin, Yong June
PY - 2013
Y1 - 2013
N2 - Wind energy is an important contributor to the evolution of the smart grid, but the power electronics necessary to interface a wind turbine generator (WTG) to the grid can have a negative impact on the power quality (PQ) of the grid if the effects are not well understood. In this paper, the wind energy conversion system is reviewed with models of the two most common types of WTGs: a doubly-fed induction generator (DFIG) and a synchronous generator (SG). Time-frequency analysis is introduced as a unique, advantageous way of quantifying and comparing the time-varying disturbances introduced by these generators, which can not be accomplished from the existing PQ indices published by International Electrotechnical Commission (IEC). Time-frequency distributions and metrics are employed to analyze the PQ effects of the DFIG and SG under two case studies: a three-phase-to-ground fault and a generator trip and recovery. The analysis of these studies reveals time-varying frequency information that can be used to properly compensate for such events in the future depending upon the type of generator employed and improve the quality of power these types of WTGs inject onto the grid.
AB - Wind energy is an important contributor to the evolution of the smart grid, but the power electronics necessary to interface a wind turbine generator (WTG) to the grid can have a negative impact on the power quality (PQ) of the grid if the effects are not well understood. In this paper, the wind energy conversion system is reviewed with models of the two most common types of WTGs: a doubly-fed induction generator (DFIG) and a synchronous generator (SG). Time-frequency analysis is introduced as a unique, advantageous way of quantifying and comparing the time-varying disturbances introduced by these generators, which can not be accomplished from the existing PQ indices published by International Electrotechnical Commission (IEC). Time-frequency distributions and metrics are employed to analyze the PQ effects of the DFIG and SG under two case studies: a three-phase-to-ground fault and a generator trip and recovery. The analysis of these studies reveals time-varying frequency information that can be used to properly compensate for such events in the future depending upon the type of generator employed and improve the quality of power these types of WTGs inject onto the grid.
KW - harmonics
KW - power quality
KW - time-frequency analysis
KW - total harmonic distortion (THD)
KW - transient
KW - voltage sag
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U2 - 10.1109/IECON.2013.6700194
DO - 10.1109/IECON.2013.6700194
M3 - Conference contribution
AN - SCOPUS:84893568514
SN - 9781479902248
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 6426
EP - 6431
BT - Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
T2 - 39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013
Y2 - 10 November 2013 through 14 November 2013
ER -
