1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationOverall efficiency of grid connected photovoltaic invertersBS EN 50530:2010+A1:2013BS EN 50530:2010+A1:2013National forewordThis British Standard is the UK implementation of EN 5
2、0530:2010+A1:2013. It supersedes BS EN 50530:2010, which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CENELEC text carry the number of the CENELEC amendment. For example, text altered by CENELEC amendment A1
3、 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee GEL/82, Photovoltaic Energy Systems.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provis
4、ions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013ISBN 978 0 580 80513 4ICS 27.160Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published u
5、nder the authority of the Standards Policy and Strategy Committee on 31 May 2010.Amendments/corrigenda issued since publicationDate Text affected30 June 2013 Implementation of CENELEC amendment A1:2013BRITISH STANDARDEUROPEAN STANDARD EN 50530:2010+A1 NORME EUROPENNE EUROPISCHE NORM March 2013CENELE
6、C European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide
7、for CENELEC members. Ref. No. EN 50530:2010 E ICS 27.160 English version Overall efficiency of grid connected photovoltaic inverters Efficacit globale des onduleurs photovoltaques raccords au rseau Gesamtwirkungsgrad von Photovoltaik-Wechselrichtern This European Standard was approved by CENELEC on
8、2010-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may
9、be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to t
10、he Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuani
11、a, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword This European Standard was prepared by the Technical Committee CENELEC TC 82, Solar photovoltaic energy systems. It was submitted to the Unique Ac
12、ceptance Procedure and approved by CENELEC on 2010-04-01. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed:
13、 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-04-01 _ This document (EN 50530:2010/A1:2013) h
14、as been prepared by CLC/TC 82 “Solar photovoltaic energy systems“. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-12-24 latest date by which the national standards
15、 conflicting with this document have to be withdrawn (dow) 2015-12-24 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. BS EN 50530:2010
16、+A1:2013EN 50530:2010+A1:2013 (E) 2 Foreword to amendment A1 Contents 1 Scope . 5 2 Normative references . 5 3 Terms and definitions 5 3.1 Inverter input (PV generator) 5 3.2 Inverter output (grid) . 6 3.3 Measured quantities . 6 3.4 Calculated quantities 7 3.5 Other definitions . 8 4 MPPT efficienc
17、y 8 4.1 General description 8 4.2 Test set-up 9 4.3 MPPT efficiency . 9 4.4 Dynamic MPPT efficiency .11 5 Calculation of the overall efficiency .13 Annex A (normative) Requirements on the measuring apparatus 14 A.1 PV generator simulator .14 A.2 AC power supply 15 Annex B (normative) Test conditions
18、 for dynamic MPPT efficiency .16 B.1 Test profiles 16 B.2 Test sequence with ramps 10 % - 50 % .17 B.3 Test sequence with ramps 30 % - 100 % 18 B.4 Start-up and shut-down test with slow ramps.18 B.5 Total test duration .19 Annex C (normative) Models of current/voltage characteristic of PV generator
19、.20 C.1 20 C.2 PV generator model for MPPT performance tests 25 Annex D (informative) Inverter efficiency .27 D.1 General / Introduction .27 D.2 Conversion efficiency .27 Bibliography 35 BS EN 50530:2010+A1:2013EN 50530:2010+A1:2013 (E) 3 Conversion and static GSTCGSTCAlternative!“!PV generator mode
20、l for MPPT performance tests! Figures Figure 1 Exemplary test set-up for MPPT efficiency measurements . 9 Figure B.1 Test sequence for fluctuations between small and medium irradiance . 16 Figure B.2 Test sequence for fluctuations between medium and high irradiance 16 Figure B.3 Test sequence for th
21、e start-up and shut-down test of grid connected inverters 19 Figure C.1 Irradiation-dependent U-I- and U-P characteristic of a c-Si PV generator . 23 Figure C.2 Irradiation-dependent U-I- and U-P characteristic of a thin-film PV generator . 24 Tables Table 1 10 Table A.1 General requirements on the
22、simulated I/V characteristic of the PV generator 14 . 17 Table B.2 Dynamic MPPT-Test 30 % 100 % 18 Table B.3 . 18 Table C.1 Technology-dependent parameters . 20 Table C.2 Technology-dependent parameters . 22Table C.3 MPP-values obtained with the cSi PV model 22 Table C.4 MPP-values obtained with the
23、 TF-PV mode 25 BS EN 50530:2010+A1:2013EN 50530:2010+A1:2013 (E) 4 Test specifications for the on version and static MPPT efficiency .Table B.1 Dynamic MPPT-Test 10 % 50 % GSTC(valid for the evaluation of MPPTdyn) GSTC(valid for the evaluation of MPPTdyn!“.! “) !“!“1 Scope This European Standard pro
24、vides a procedure for the measurement of the efficiency of the maximum power point tracking (MPPT) of inverters, which are used in grid-connected photovoltaic systems. In that case the inverter energizes a low voltage grid with rated AC voltage and rated frequency. Both the static and dynamic MPPT e
25、fficiency is considered. Based on the static MPPT efficiency and conversion efficiency the overall inverter efficiency is calculated. The dynamic MPPT efficiency is indicated separately. 2 Normative references The following referenced documents are indispensable for the application of this document.
26、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50160, Voltage characteristics of electricity supplied by public distribution networks EN 50524, Data sheet and name plate for photovolt
27、aic inverters CLC/TS 61836, Solar photovoltaic energy systems - Terms, definitions and symbols (IEC/TS 61836:2007) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Inverter input (PV generator) 3.1.1 maximum input voltage (UDCmax) allowed maxi
28、mum voltage at the inverter input NOTE Exceeding of UDCmaxmay destroy the equipment under test. 3.1.2 minimum input voltage (UDCmin) minimum input voltage for the inverter to energize the utility grid, independent of mode of operation 3.1.3 rated input voltage (UDC,r) input voltage specified by the
29、manufacturer, to which other data sheet information refers NOTE If this value is not specified by the manufacturer, Vdc,r= (Vmppmax+ Vmppmin)/2 shall be used. 3.1.4 maximum MPP voltage (UMPPmax) maximum voltage at which the inverter can convert its rated power under MPPT conditions NOTE If the speci
30、fied value of the manufacturer for UMPPmaxis higher than 0,8 UDCmax, the measurement must be performed with UMPPmax= 0,8 UDCmax. !Text deleted“BS EN 50530:2010+A1:2013EN 50530:2010+A1:2013 (E) 5 3.1.5 minimum MPP voltage (UMPPmin) minimum voltage at which the inverter can convert its rated power und
31、er MPPT conditions NOTE The actual minimum MPP voltage may depend on the grid voltage level. 3.1.6 rated input power (PDC,r) rated input power of the inverter, which can be converted under continuous operating conditions NOTE If this value is not specified by the manufacturer, it can be defined as P
32、DC,r= PAC,r/ conv,r, in which conv,ris the conversion efficiency at rated DC voltage. If the rated conversion efficiency is not specified, it shall be measured. 3.1.7 maximum input current (IDC,max) maximum input current of the inverter under continuous operating conditions NOTE At inverters with se
33、veral independent inputs, this value may depend on the chosen input configuration. 3.2 Inverter output (grid) 3.2.1 rated grid voltage (UAC,r) utility grid voltage to which other data sheet information refers 3.2.2 rated power (PAC,r) active power the inverter can deliver in continuous operation 3.3
34、 Measured quantities 3.3.1 PV simulator MPP-Power (PMPP, PVS) MPP power provided by the PV simulator 3.3.2 input power (PDC) measured input power of the device under test 3.3.3 PV simulator MPP voltage (UMPP, PVS) MPP voltage provided by the PV simulator 3.3.4 input voltage (UDC) measured input volt
35、age of the device under test 3.3.5 PV simulator MPP current (IMPP, PVS) MPP current provided by the PV simulator 3.3.6 input current (IDC) measured input current of the device under test 3.3.7 output power (PAC) measured AC output power of the device under test !“BS EN 50530:2010+A1:2013EN 50530:201
36、0+A1:2013 (E) 6 3.3.8 output voltage (UAC) measured AC voltage 3.3.9 output current (IAC) measured AC output current of the device under test 3.4 Calculated quantities 3.4.1 MPPT efficiency, energetic (MPPT) ratio of the energy drawn by the device under test within a defined measuring period TM to t
37、he energy provided theoretically by the PV simulator in the maximum power point (MPP): 00()()MMTDCMPPT TMPPp tdtp tdt=(1) where pDC(t) instantaneous value of the power drawn by the device under test; pMPP(t) instantaneous value of the MPP power provided theoretically by the PV simulator 3.4.2 conver
38、sion efficiency, energetic (conv) ratio of the energy delivered by the device under test at the AC terminal within a defined measuring period TMto the energy accepted by the device under test at the DC terminal: 00()()MMTACconv TDCp tdtp tdt=(2) where pAC(t) instantaneous value of the delivered powe
39、r at the AC terminal of the device under test; pDC(t) instantaneous value of the accepted power at the DC terminal of the device under test 3.4.3 overall (total) efficiency, energetic (t) ratio of the energy delivered by the device under test at the AC terminals within a defined measuring period TMt
40、o the energy provided theoretically by the PV simulator: 00()()MMTACt TMPPp tdtp tdt=respectively MPPTconvt= (3) BS EN 50530:2010+A1:2013EN 50530:2010+A1:2013 (E) 7 3.5 Other definitions 3.5.1 photovoltaic array simulator current source emulating the static and dynamic behaviour of a PV array, in pa
41、rticular the current-voltage characteristic (cf. IEC/TS 61836). The requirements are outlined in Clause A.1 4 MPPT and conversion efficiencies 4.1 General description Both the static as well as the dynamic MPPT efficiencies are determined from the sampled instantaneous values of voltage and current
42、at the input of the inverter. It indicates which amount of the theoretically usable PV generator power is actually used by the inverter. a) Static MPPT efficiency The static MPPT efficiency is determined by means of measurement as follows: ,1MPPTstat DC i DC iiMPP PVS MUI TPT= (4) where UDC,isampled
43、 value of the inverters input voltage; IDC,isampled value of the inverters input current; TM overall measuring period; T period between two subsequent sample values. The static MPPT efficiency describes the accuracy of an inverter to regulate on the maximum power point on a given static characterist
44、ic curve of a PV generator. NOTE UDC,iand IDC,imust be sampled at the same time. b) Dynamic MPPT efficiency Variations of the irradiation intensity and the resulting transition of the inverter to the new operation point are not considered with the static MPPT efficiency. For the evaluation of this t
45、ransient characteristic the dynamic MPPT efficiency is specified. The dynamic MPPT efficiency is defined as: ,1MPPTdyn DC i DC i iiMPP PVS j jjUI TPT= (5) The MPPT efficiency describes the accuracy of an inverter to set its operating conditions to match the maximum power point on the characteristic
46、curve of a PV generator. The MPPT efficiency is divided into the static and dynamic conditions. As with inverters with poor MPPT performance, the resulting DC input voltage is different from MPP voltage and conversion efficiency depends on DC input voltage, measurements of static MPPT efficiency and
47、 static power conversion efficiency according to 4.3 shall be performed simultaneously (detailed explanation in the informative Annex F). !“BS EN 50530:2010+A1:2013EN 50530:2010+A1:2013 (E) 8 4.2 Test set-up The generic test set-up for single phase grid connected inverters is depicted in Figure 1. T
48、he diagram can also be considered as a single phase representation of a test-circuit for multi phase inverters. Figure 1 Exemplary test set-up for MPPT efficiency measurements Key EUT Equipment under test (inverter); IDCDC current meter; UDCDC voltage meter; PDCDC power meter; UACAC voltage meter; P
49、ACAC power meter. The DC source connected to the PV input of the inverter shall be a PV simulator in accordance to the specifications in Clause A.1. The AC supply of the inverter must be in accordance to the specifications in Clause A.2. NOTE4.3 Conversion and static MPPT efficiency 4.3.1 Test conditions PV-Simulator EUT AC Grid !“The measurement of the conversion and static MPPT efficiency shall be performed simultaneously with test specifications as
