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Improved power performance assessment methods

Abstract

The uncertainty of presently-used methods for retrospective assessment of the productive capacity of wind farms is unacceptably large. The possibilities of improving the accuracy have been investigated and are reported. A method is presented that includes an extended power curve and site calibration. In addition, blockage effects with respect to reference wind speed measurements are analysed. It is found that significant accuracy improvements are possible by the introduction of more input variables such as turbulence and wind shear, in addition to mean wind speed and air density. Also, the testing of several or all machines in the wind farm - instead of only one or two - may provide a better estimate of the average performance. (au)
Authors:
Frandsen, S; Antoniou, I; Dahlberg, J A [1] 
  1. and others
Publication Date:
Mar 01, 1999
Product Type:
Conference
Report Number:
RISO-R-1114(EN); CONF-990314-
Reference Number:
SCA: 170602; PA: DK-99:001379; EDB-99:087330; SN: 99002098286
Resource Relation:
Conference: EWEC`99. European wind energy conference, Nice (France), 1-5 Mar 1999; Other Information: PBD: Mar 1999; Related Information: Is Part Of Contributions from the Department of Wind Energy and Atmospheric Physics to EWEC `99 in Nice, France; Larsen, Gunnar C.; Westermann, Kirsten; Noergaard, Per [eds.]; PB: 256 p.
Subject:
17 WIND ENERGY; WIND TURBINE ARRAYS; CAPACITY; SITE CHARACTERIZATION; SENSITIVITY ANALYSIS; WIND; FLOW BLOCKAGE
OSTI ID:
679598
Research Organizations:
Risoe National Lab., Roskilde (Denmark). Wind Energy and Atmospheric Physics Dept.
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE99747779; CNN: Contract JOR3-CT96-0114; ISBN 87-550-2542-0; TRN: DK9901379
Availability:
OSTI as DE99747779
Submitting Site:
DK
Size:
pp. 13-16
Announcement Date:

Citation Formats

Frandsen, S, Antoniou, I, and Dahlberg, J A. Improved power performance assessment methods. Denmark: N. p., 1999. Web.
Frandsen, S, Antoniou, I, & Dahlberg, J A. Improved power performance assessment methods. Denmark.
Frandsen, S, Antoniou, I, and Dahlberg, J A. 1999. "Improved power performance assessment methods." Denmark.
@misc{etde_679598,
title = {Improved power performance assessment methods}
author = {Frandsen, S, Antoniou, I, and Dahlberg, J A}
abstractNote = {The uncertainty of presently-used methods for retrospective assessment of the productive capacity of wind farms is unacceptably large. The possibilities of improving the accuracy have been investigated and are reported. A method is presented that includes an extended power curve and site calibration. In addition, blockage effects with respect to reference wind speed measurements are analysed. It is found that significant accuracy improvements are possible by the introduction of more input variables such as turbulence and wind shear, in addition to mean wind speed and air density. Also, the testing of several or all machines in the wind farm - instead of only one or two - may provide a better estimate of the average performance. (au)}
place = {Denmark}
year = {1999}
month = {Mar}
}