SIST EN 50530:2011/A1:2013
(Amendment)Overall efficiency of grid connected photovoltaic inverters
Overall efficiency of grid connected photovoltaic inverters
This European Standard provides 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 efficiency is considered.
Gesamtwirkungsgrad von Photovoltaik-Wechselrichtern
Efficacité globale des onduleurs photovoltaïques raccordés au réseau
Celovita učinkovitost fotonapetostnih razsmernikov - Dopolnilo AA
Ta evropski standard zagotavlja postopek za merjenje učinkovitosti sledenja maksimalni moči (MPPT) razsmernikov, ki se uporabljajo v omrežju povezanih fotonapetostnih sistemov. V tem primeru razsmernik napaja nizkonapetostno omrežje z nazivno izmenično napetostjo in nazivno frekvenco. Upoštevani sta statična in dinamična učinkovitost MPPT. Na osnovi statične učinkovitosti MPPT in učinkovitosti pretvorbe se izračuna celovita učinkovitost razsmernika. Dinamična učinkovitost MPPT je prikazana ločeno.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gesamtwirkungsgrad von Photovoltaik-WechselrichternEfficacité globale des onduleurs photovoltaïques raccordés au réseauOverall efficiency of grid connected photovoltaic inverters27.160Solar energy engineeringICS:Ta slovenski standard je istoveten z:EN 50530:2010/A1:2013SIST EN 50530:2011/A1:2013en,fr,de01-april-2013SIST EN 50530:2011/A1:2013SLOVENSKI
STANDARD
SIST EN 50530:2011/A1:2013
EUROPEAN STANDARD EN 50530/A1 NORME EUROPÉENNE
EUROPÄISCHE NORM March 2013
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2013 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50530:2010/A1:2013 E
ICS 27.160
English version
Overall efficiency of grid connected photovoltaic inverters
Efficacité globale des onduleurs photovoltaïques raccordés au réseau
Gesamtwirkungsgrad von Photovoltaik-Wechselrichtern
This amendment A1 modifies the European Standard EN 50530:2010; it was approved by CENELEC on 2012-12-24. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member.
This amendment 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 the CEN-CENELEC Management Centre 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
SIST EN 50530:2011/A1:2013
EN 50530:2010/A1:2013 – 2 –
Foreword This document (EN 50530:2010/A1:2013) has 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 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. SIST EN 50530:2011/A1:2013
– 3 – EN 50530:2010/A1:2013
2 Normative references Delete the following reference: EN 61683, Photovoltaic systems – Power conditioners – Procedure for measuring efficiency (IEC 61683) 3 Terms and definitions In 3.1.6, replace the note by the following: If this value is not specified by the manufacturer, it can be defined as PDC,r = PAC,r / conv,r, in which conv,r is the conversion efficiency at rated DC voltage. If the rated conversion efficiency is not specified, it shall be measured. 4 MPPT and conversion efficiencies 4.1 General description In the 1st paragraph, replace the two first sentences by the following: The MPPT efficiency describes the accuracy of an inverter to set its operating conditions to match the maximum power point on the characteristic 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 static power conversion efficiency according to 4.3 shall be performed simultaneously (detailed explanation in the informative Annex F). 4.2 Test set-up Replace Figure 1 by the following:
Replace the note by the following: For the conversion efficiency, the DC and AC voltages shall be measured as close as possible to the inverter terminals. For MPPT efficiency, the DC voltage shall be measured as close as possible to the PV simulator. For combined conversion and MPPT efficiency measurements, two voltage PV-Simulator EUT AC Grid SIST EN 50530:2011/A1:2013
EN 50530:2010/A1:2013 – 4 –
measurements will be required at the output of the PVS and the DC input of the EUT, in order to avoid measurement errors resulting from the voltage drop between the PVS and the EUT.
4.3 Static MPPT efficiency Replace the title of 4.3 by the following: 4.3 Conversion and static MPPT efficiency 4.3.1 Test conditions for the static MPPT efficiency Replace the title of 4.3.1 by the following: 4.3.1 Test conditions
Replace the 1st paragraph by the following: The measurement of the conversion and static MPPT efficiency shall be performed simultaneously with test specifications as defined in Table 1. Delete the note. Replace the title of Table 1 by the following Table 1 – Test specifications for the conversion and static MPPT efficiency In Table 1, add the following row before the table footnotes: The MPP voltages at the different test conditions (UMPPmax, UDC,r, UMPPmin) shall be kept constant during the test for each power level. Replace the last paragraph by the following:
The measurement should be performed at an ambient temperature of 25 °C ± 5 °C. Other ambient temperatures can be mutually agreed. The actual ambient temperature shall be specified in the test report. 4.3.2 Measurement procedure Replace the text between NOTE 2 and NOTE 3 by the following: The measuring time for each test condition as specified in Table 1 amounts to 10 min. For the first power level of each MPP voltage setting, the stabilisation of the MPPT-tracker has to be awaited. If a stabilisation cannot be observed a stabilisation time of at least 5 min is defined.
After a change of the power level a general stabilisation period of 2 min should be used. Data recorded during the stabilisation periods are not to be considered for the calculation of the static MPPT and conversion efficiency. After the stabilisation of the MPP tracking the following parameters have to be logged: – PMPP,PVS; – PDC; – UMPP,PVS; – IMPP,PVS; – IDC; – PAC. Replace "NOTE 3" and "NOTE 4" by "NOTE 2" and "NOTE 3" respectively. SIST EN 50530:2011/A1:2013
– 5 – EN 50530:2010/A1:2013
4.3.3 Evaluation – Calculation of static MPPT efficiency Replace the title of 4.3.3 by the following: 4.3.3 Evaluation – Ca
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