1、Wind turbine generator systems Part 21:Measurement and assessment of power qualitycharacteristics of grid connected wind turbinesReference numberIEC 61400-21:2001(E)INTERNATIONALSTANDARDIEC61400-21First edition2001-12This English-language version is derived from the originalbilingual publication by
2、leaving out all French-languagepages.Missing page numbers correspond to the French-language pages.Wind turbine generator systems Part 21:Measurement and assessment of power qualitycharacteristics of grid connected wind turbinesFor price,see current catalogue IEC 2001 Copyright-all rights reservedNo
3、part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephon
4、e:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.chINTERNATIONALSTANDARDIEC61400-21First edition2001-12XCommission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE61400-21 IEC:2001 3 CONTENTSFOREWORD.7INTRODUCTION.91Scope.112Normative ref
5、erences.133Definitions.134Symbols and units.215Abbreviations.236Wind turbine power quality characteristic parameters.256.1General.256.2Rated data.256.3Maximum permitted power.256.4Maximum measured power.256.5Reactive power.256.6Voltage fluctuations.256.7Harmonics.277Measurement procedures.297.1Gener
6、al.297.2Rated data.357.3Maximum permitted power.357.4Maximum measured power.357.5Reactive power.357.6Voltage fluctuations.377.7Harmonics.478Assessment of power quality.498.1General.498.2Steady-state voltage.518.3Voltage fluctuations.518.4Harmonics.57Annex A(informative)Sample report format.59Annex B
7、(informative)Voltage fluctuations and flicker.69Bibliography.85Figure 1 Assumed elements of measurement system.33Figure 2 Fictitious grid for simulation of fictitious voltage.37Figure B.1 Measurement and assessment procedures for flicker during continuousoperation of the wind turbine.69Figure B.2 Me
8、asurement and assessment procedures for voltage changes and flickerduring switching operations of the wind turbine.71Figure B.3 Flicker coefficient as a function of wind speed.7361400-21 IEC:2001 5 Table 1 Specification of requirements for measurement equipment.33Table 2 Specification of exponents a
9、ccording to IEC 61000-3-6.57Table B.1 Number of measurements Nm,i and frequency of occurrence of fm,i and fy,ifor each wind speed bin in the range from cut-in wind speed to 15 m/s.75Table B.2 Weighting factor wi for each wind speed bin.75Table B.3 Total sum of weighting factor multiplied by number o
10、f measurements for allwind speed bins.77Table B.4 Weighted accumulated distribution of the flicker coefficients Pr(cx)foreach wind speed distribution.77Table B.5 Resulting flicker coefficient in continuous operation.79Table B.6 Probabilities and percentiles for different wind speeds.7961400-21 IEC:2
11、001 7 INTERNATIONAL ELECTROTECHNICAL COMMISSION_WIND TURBINE GENERATOR SYSTEMS Part 21:Measurement and assessment of power quality characteristicsof grid connected wind turbinesFOREWORD1)The IEC(International Electrotechnical Commission)is a worldwide organization for standardization comprisingall n
12、ational electrotechnical committees(IEC National Committees).The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields.Tothis end and in addition to other activities,the IEC publishes International Standards.Thei
13、r preparation isentrusted to technical committees;any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work.International,governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation.The IEC collaborates close
14、ly with the International Organizationfor Standardization(ISO)in accordance with conditions determined by agreement between the twoorganizations.2)The formal decisions or agreements of the IEC on technical matters express,as nearly as possible,aninternational consensus of opinion on the relevant sub
15、jects since each technical committee has representationfrom all interested National Committees.3)The documents produced have the form of recommendations for international use and are published in the formof standards,technical specifications,technical reports or guides and they are accepted by the N
16、ationalCommittees in that sense.4)In order to promote international unification,IEC National Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards.Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.5)The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for anyequipment declared to be i
