IEC_62548_Ed.1.pdf

FORM CDV(IEC)2009-01-09 Registered trademark of the International Electrotechnical Commission 82/646/CDV COMMITTEE DRAFT FOR VOTE(CDV)PROJET DE COMIT POUR VOTE(CDV)Project number Numro de projet IEC 62548 Ed.1 EC/TC or SC:CEI/CE ou SC:82 Secretariat/Secrtariat USA Submitted for parallel voting in CENELEC Soumis au vote parallle au CENELEC Date of circulation Date de diffusion 2011-04-15 Closing date for voting(Voting mandatory for P-members)Date de clture du vote(Vote obligatoire pour les membres(P)2011-09-16 Also of interest to the following committees Intresse galement les comits suivants TC 64 Supersedes document Remplace le document 82/592/CD&82/638/CC Proposed horizontal standard Norme horizontale suggre Other TC/SCs are requested to indicate their interest,if any,in this CDV to the TC/SC secretary Les autres CE/SC sont requis dindiquer leur intrt,si ncessaire,dans ce CDV lintention du secrtaire du CE/SC Functions concerned Fonctions concernes Safety Scurit EMC CEM Environment Environnement Quality assurance Assurance qualit CE DOCUMENT EST TOUJOURS LTUDE ET SUSCEPTIBLE DE MODIFICATION.IL NE PEUT SERVIR DE RFRENCE.LES RCIPIENDAIRES DU PRSENT DOCUMENT SONT INVITS PRSENTER,AVEC LEURS OBSERVATIONS,LA NOTIFICATION DES DROITS DE PROPRIT DONT ILS AURAIENT VENTUELLEMENT CONNAISSANCE ET FOURNIR UNE DOCUMENTATION EXPLICATIVE.THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE.IT SHOULD NOT BE USED FOR REFERENCE PURPOSES.RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT,WITH THEIR COMMENTS,NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.Titre:Title:IEC 62548 Ed.1:Design requirements for photovoltaic(PV)arrays Note dintroduction Introductory note NOTE:The French national committee being unable to deliver the French version within the required time,this CDV is circulated in English only.The French CDV version will be circulated as soon as it is made available.ATTENTION IEC CENELEC PARALLEL VOTING The attention of IEC National Committees,members of CENELEC,is drawn to the fact that this Committee Draft for Vote(CDV)for an International Standard is submitted for parallel voting.The CENELEC members are invited to vote through the CENELEC online voting system.Copyright 2011 International Electrotechnical Commission,IEC.All rights reserved.It is permitted to download this electronic file,to make a copy and to print out the content for the sole purpose of preparing National Committee positions.You may not copy or mirror the file or printed version of the document,or any part of it,for any other purpose without permission in writing from IEC.62548/CDV IEC:201X(E)2 Project IEC 62548 Design Requirements for Photovoltaic(PV)Arrays Revision D.Post-Korean meeting of wg3(23/10/2008)Revision E.Ted(9/1/2009)Revision F.Ted(28/1/2009)Revision G.Ted(9/2/2009).Clarification of functional and protective earthing terms done.Removed appendices as these need a lot more work later .Worked through John Wiles comments.Worked through all IEC comments on the CD and put in replies.Some areas still to be discussed and resolved.Added references to a fuse selection discussion document.”PV_discussion_Fuse_Selection.pdf”for assisting in selecting the current range available for fuse rating according to the Isc and reverse current rating.Revision H.Mark Cole .Suggested changes by mark after Munich meeting 2009 Revision I.Ted(Nov 2009).Major changes to reverse current rating and fuse selection .Minor other revisions and tidying up for next CD.Revision J.Ted .Changes after October 2009 WG3 meeting ready for next CD Revision K.Greg Ball .Final edits Dec 2009 .THIS IS THE VERSION SENT OUT AS 82/592/CD Revision L.Ted .Edits after compilation of comments on 82/592/CD Revision L1.Ted .Minor edits after Martina Calaiss comments Revision M.Ted .Edits after WG3 meeting in Seville May 2010.Still to be resolved is the issue of terminology Generator and array vs Array and sub-array.Email enquiry sent to WG1 Revision N.Ted .Small Edits before WG3 meeting in Newcastle Revision O.Ted .Edits after WG3 meeting in Newcastle Revision P.Ted .More Edits after WG3 meeting in Newcastle Revision Q.Ted .Edits Martin&Jims comments on document P Revision R.Ted .Final version submitted as CDV Feb 2011 62548/CDV IEC:201X(E)3 Table of Contents 1 Scope and object.5 2 Normative references.5 3 Terms and definitions.6 3.41 11 4 NOTEThis standard assumes that all strings within a PV array are connected in parallel;hence the open circuit voltage of PV sub-arrays and PV strings is equal to VOC ARRAY.Compliance with IEC60364.13 5 PV array system configuration.13 5.1 General.13 5.1.1 PV System Architectures.14 5.1.2 Array Electrical Diagrams.15 5.1.3 Series-parallel configuration.18 5.1.4 Batteries in systems.18 5.1.5 Considerations due to prospective fault conditions within a PV array.18 5.1.6 Considerations due to operating temperature.18 5.1.7 Performance issues.19 5.2 Mechanical design.19 5.2.1 General.19 5.2.2 Thermal a