Requirementsforgeneratingplantstobe connectedinparallelwithdistributionnetworks
Part 1: Connection to a LV distribution network-Generating plants up to and includingType B
bsi.
Nationalforeword
This British Standard is the UK implementation of EN 50549-1:2019. It supersedes BS EN 50438:2013 which is withdrawn.
The UK participation in its preparation was entrusted to TechnicalCommittee GEL/8 Systems Aspects for Electrical Energy Supply.
A list of organizations represented on this mittee can be obtained onrequest to its secretary.
This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.
The British Standards Institution 2019Published by BSI Standards Limited 2019
ISBN 978 0 580 98048 0
ICS 29.160.20
Compliance with a British Standard cannot conferimmunity fromlegal obligations.
Standards Policy and Strategy Committee on 28 February 2019. This British Standard was published under the authority of the
Amendments/corrigenda issued since publication
Date
Text affected
EN50549-1
ICS 29.160.20
English Version
Requirementsforgeneratingplantstobeconnected inparallelwithdistributionnetworks-Part1:ConnectiontoaLVdistributionnetwork-Generatingplants uptoandincludingTypeB
za wa ed n g adas Niederspannungsverteilnetz bis einschlieSlich Typ B vorgesehene Erzeugungsanlagen - Teil 1: Anschluss an
Exigences relatives aux centrales electriques destinees aetre raccordees en parallele a des neseaux de distribution - Partie 1: Raccordement a un reseau de distribution BT -Centrales electriques jusqu'au Type B inclus
This European Standard was approved by CENELEC on 2018-06-09.CENELEC members are bound to ply with the CEN/CENELECInternal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-todatelists and bibliographicalreferences concerning such national standards may be obtained on application to the CEN-CENELECManagement Centre or to any CENELEC member.
This European Standard exists in three official versions (English French Geman). A version inany other language made by translation under the responsibity of a CENELEC member intoits own language and notified to the CEN-CENELEC Management Centre has thesame status as the official versions.
CENELEC members are the national electrotechnical mites of Austria Belgium Bulgaria Croatia Cyprus the Czech Republic DenmrstnFlldnraeglandlLithuania Lumurg Malta the Ntherlands Nowy Poland Porugal Rmana erbia Slvakia Snia pin Swden Switzerland Turkey and the United Kingdom.
European Committe for Electrotechnical Standardization Comite Europeen de Normalisation ElectrotechniqueEuropisches Komitce fur Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23 B-1040 Brussels
Contents
European foreword 4Introduction... .52 1 Scope. Normative references .8 .93 Terms and definitions. ..3.1 General .93.2 Plant module and unit.. Power. ...13.3 3.4 Voltage. 14 153.5 Circuit theory...... ..163.6 3.7 Protection. Control .18 224 Requirements on generating plants ...234.1 General 234.2 4.3 Connection scheme. Choice of switchgear. ..24 .244.3.1 General 244.3.2 Interface switch ..244.4 Normal operating range.. 4.4.1 General .25 254.4.2 Operating frequency range 254.4.4 4.4.3 Minimal requirement for active power delivery at underfrequency. Continuous operating voltage range ..264.5 Immunity to disturbances. ..274.5.1 General ..274.5.3 4.5.2 Rate of change of frequency (ROCOF) immunity Under-voltage ride through (UVRT) 274.5.4 Over-voltage ride through (OVRT). ..294.6 Active response to frequency deviation .. Power response to overfrequency. ..304.6.1 4.6.2 Power response to underfrequency. ..30 ..334.7 Power response to voltage changes. 364.7.1 4.7.2 Voltage support by reactive power. General ..36 ..364.7.3 Voltage related active power reduction4.7.4 Short circuit current requirements on generating plants ..414.8 4.9 EMC and power quality Interface protection. ..4.3 424.9.1 General ..434.9.2 Requirements on voltage and frequency protection.. Void. ..45 444.9.3 4.9.4 Means to detect island situation 47
4.9.5 Digital input to the interface protection ..48 .484.10 Connection and starting to generate electrical power... 4.10.1 General......4.10.2 Automatic reconnection after tripping... ...484.10.3 Starting to generate electrical power 4.10.4 Synchronization. ..48 ..94.11 Ceasing and reduction of active power on set point.....4.11.1 Ceasing active power... ...94.12 Remote information exchange.... 4.11.2 Reduction of active power on set point ..494.13 Requirements regarding single fault tolerance of interface protection systemAnnex A (informative)Interconnection guidance and interface switch ...50 .51A.1 General. ...51A.2 Network integration ...A.3 Clusters of single-phase generating units .52Annex B (informative) Void Annex C (informative)Parameter Table .... ..53..59Annex E (informative) Loss of Mains and overall power system security ... ...1Annex F (informative) Examples of protection strategies.... ...2F.1 Introduction. ..62F.1.2 F.1.1 Generalities... General.F.1.3 Detection of unwanted islands.. 62F.1.4 Problems with uncontrolled islanding in MV networks.F.1.4.1 Safety . ... ...3F.1.4.2 F.1.4.3 Reclosing operations. Grid parameters 63F.1.4.4 Protection of islands against overcurrents ..63F.1.4.5 Protection against phase to earth faults. .63F.2 Example strategy 1. ..64F.3 Example strategy 2.Annex H (informative)Relationship between this European standard and the Annex G (normative) Abbreviations. ..69COMMISSION REGULATION (EU) 2016/631Bibliography.....
