EN 62116-2014 en Utility-interconnected photovoltaic inverters - Test procedure of islanding prevention measures.pdf

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1、BSI Standards PublicationUtility-interconnected photovoltaic inverters Test procedure of islanding prevention measuresBS EN 62116:2014National forewordThis British Standard is the UK implementation of EN 62116:2014. It is identical to IEC 62116:2014. It supersedes BS EN 62116:2011, which will bewith

2、drawn on 2 April 2017.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/82, Photovoltaic Energy Systems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provis

3、ions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 78759 1ICS 27.160Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published unde

4、r the authority of theStandards Policy and Strategy Committee on 31 August 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62116:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 62116 July 2014 ICS 27.160 Supersedes EN 62116:2011 English Version Uti

5、lity-interconnected photovoltaic inverters - Test procedure of islanding prevention measures (IEC 62116:2014) Onduleurs photovoltaques interconnects au rseau public - Procdure dessai des mesures de prvention contre llotage (CEI 62116:2014) Photovoltaik-Wechselrichter fr den Anschluss an das Stromver

6、sorgungsnetz - Prfverfahren fr Manahmen zur Verhinderung der Inselbildung (IEC 62116:2014) This European Standard was approved by CENELEC on 2014-04-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the

7、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 European Standard exists in three official versions (English, Fr

8、ench, 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 Austri

9、a, 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,

10、 Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights of ex

11、ploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 62116:2014 E BS EN 62116:2014EN 62116:2014 - 2 - Foreword The text of document 82/813/FDIS, future edition 2 of IEC 62116, prepared by IEC/TC 82 “Solar photovoltaic energy systems“ was submitted to the IEC-CE

12、NELEC parallel vote and approved by CENELEC as EN 62116:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-01-25 latest date by which the national standards confl

13、icting with the document have to be withdrawn (dow) 2017-04-02 This document supersedes EN 62116:2011. EN 62116:2014 includes the following significant technical changes with respect to EN 62116:2011: Previous edition Present edition 3.7 Real power Active power 5.1 5.4 6.1 b) 6.1 d) 6.1 e) 6.1 g) Ta

14、ble 1 Table 6 Table 7 Table 9 5.2 A PV array or PV array simulator (preferred) may be used. If the EUT can operate in utility-interconnected mode from a storage battery, a DC power source may be used in lieu of a battery as long as the DC power source is not the limiting device as far as the maximum

15、 EUT input current is concerned. A DC power source, such as a PV array simulator, a PV array, or a current and voltage limited DC power supply with series resistance may be used. If the EUT can operate in utility-interconnected mode from a storage battery, a DC power source may be used in lieu of a

16、battery as long as the DC power source shall not be the limiting device as far as the maximum EUT input current is concerned. BS EN 62116:2014- 3 - EN 62116:2014 Table 5 EUT input voltage 90 % EUT input voltage 75 % EUT input voltage 10 % EUT input voltage 20 % EUT Trip Settings Manufacturer specifi

17、ed voltage and frequency trip settings Voltage and frequency trip settings according to National standards and/or local code Tables 6 that procedure is the subject of this document. This standard provides a consensus test procedure to evaluate the efficacy of islanding prevention measures used by th

18、e power conditioner of utility-interconnected PV systems. Note that while this document specifically addresses inverters for photovoltaic systems, with some modifications the setup and procedure may also be used to evaluate inverters used with other generation sources or to evaluate separate anti-is

19、landing devices intended for use in conjunction with PV inverters or other generation sources acting as or supplementing the anti-islanding feature of those sources. Inverters and other devices meeting the requirements of this document can be considered non-islanding, meaning that under reasonable c

20、onditions, the device will detect island conditions and cease to energize the public electric power grid. BS EN 62116:2014IEC 62116:2014 IEC 2014 7 UTILITY-INTERCONNECTED PHOTOVOLTAIC INVERTERS TEST PROCEDURE OF ISLANDING PREVENTION MEASURES 1 Scope The purpose of this International Standard is to p

21、rovide a test procedure to evaluate the performance of islanding prevention measures used with utility-interconnected PV systems. This standard describes a guideline for testing the performance of automatic islanding prevention measures installed in or with single or multi-phase utility interactive

22、PV inverters connected to the utility grid. The test procedure and criteria described are minimum requirements that will allow repeatability. Additional requirements or more stringent criteria may be specified if demonstrable risk can be shown. Inverters and other devices meeting the requirements of

23、 this standard are considered non-islanding as defined in IEC 61727. This standard may be applied to other types of utility-interconnected systems (e.g. inverter-based microturbine and fuel cells, induction and synchronous machines). However, technical review may be necessary for other than inverter

24、-based PV systems. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (

25、including any amendments) applies. IEC/TS 61836, Solar photovoltaic energy systems Terms, definitions and symbols 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 61836 as well as the following apply. 3.1 PV array simulator DC power source used to sim

26、ulate PV array output 3.2 EUT equipment under test inverter or anti-islanding device on which these tests are performed Note 1 to entry: This note applies to the French language only. 3.3 MPPT maximum power point tracking PV array control strategy used to maximize the output of the system under the

27、prevailing conditions Note 1 to entry: This note applies to the French language only. BS EN 62116:2014 8 IEC 62116:2014 IEC 2014 3.4 non-islanding inverter inverter that will cease to energize a utility distribution system that is out of the nominal operation specifications for voltage and/or freque

28、ncy SOURCE: IEC 61727:2004, 3.8.1 3.5 island state in which a portion of the electric utility grid, containing load and generation, continues to operate isolated from the rest of the grid Note 1 to entry: The generation and loads may be any combination of customer-owned and utility-owned. 3.6 intent

29、ional island island that is intentionally created, usually to restore or maintain power to a section of the utility grid affected by a fault Note 1 to entry: The generation and loads may be any combination of customer-owned and utility-owned, but there is an implicit or explicit agreement between th

30、e controlling utility and the operators of customer-owned generation for this situation. 3.7 quality factor Qfa measure of the strength of resonance of the islanding test load Note 1 to entry: In a parallel resonant circuit, such as a load on a power system LCRQ =fwhere Qfis quality factor R is effe

31、ctive load resistance C is reactive load capacitance (including shunt capacitors) L is reactive load inductance With C and L tuned to the power system fundamental frequency, Qffor the resonant circuit drawing active power, P, reactive powers QL, for inductive load and QCfor capacitive load, Qfcan be

32、 determined by ( )CLf1 QQPQ = where P is active power, in W QLis inductive load, in VArLQCis capacitive load, in VArC3.8 run-on time tRamount of time that an unintentional island condition exists, calculated as the interval between the opening of the switch S1 (Figure 1) and the cessation of EUT out

33、put current BS EN 62116:2014IEC 62116:2014 IEC 2014 9 3.9 stopping signal signal provided by the inverter indicating it has ceased energizing its utility grid-connected output terminals SEE: Annex C. 3.10 unintentional island islanding condition in which the generation within the island that is supp

34、osed to cease energizing the utility grid instead continues to energize the utility grid 4 Testing circuit The testing circuit shown in Figure 1 shall be employed. Similar circuits shall be used for three-phase output. Parameters to be measured are shown in Table 1 and Figure 1. Parameters to be rec

35、orded in the test report are discussed in Clause 7. BS EN 62116:2014 10 IEC 62116:2014 IEC 2014 Table 1 Parameters to be measured in real time Parameter Symbol Units EUT DC input a, bDC voltage VDCV DC current IDCA DC power PDCW Irradiance cG W/m2EUT AC output AC voltage b, d, eVEUTV AC current b, d

36、, eIEUTA Active power bPEUTW Reactive power bQEUTVAr Voltage waveform d, e, f, gCurrent waveformd, e, f, gEUT (relay) output control signal dRun-on time tRs Stopping signal hSS - Test load bResistive load current IRA Inductive load current ILA Capacitive load current ICA AC (utility) power source Ut

37、ility active power iPACW Utility reactive power iQACVAr Utility current iIACA aIf applicable. bRecord values measured before switch S1 is opened. cRecorded when the test is carried out using a PV array. Pyranometer should be fast response silicon-type not thermopile-type. dThe response time of volta

38、ge and current transducer shall be suitable for the sampling rate used. eThe waveform, AC voltage and current shall be measured on all phases. fThe waveform data shall be recorded from the beginning of the islanding test until the EUT ceases output. The measurement of time shall have an accuracy and

39、 resolution of better than 1 ms. gWhen the waveform is recorded, the synchronizing signal of the S1 opening and stopping signal may be simultaneously recorded. hIf available from the EUT. iSignal shall be filtered as necessary to provide fundamental (50 Hz or 60 Hz) frequency value. Fundamental valu

40、es will ignore incidental harmonics, caused by utility voltage distortion, absorbed by the load and EUT filtering capacitors. BS EN 62116:2014IEC 62116:2014 IEC 2014 11 DC power source (PV) EUT (inverter) Waveform monitor VDCS1 S2 AC loads TriggerAC power source (utility) IDCVEUTIEUTIACPDCPEUTQEUTPA

41、CQACIRILICIEC 1567/08 Figure 1 Test circuit for islanding detection function in a power conditioner (inverter) 5 Testing equipment 5.1 Measuring instruments Waveform observation shall be measured by a device with memory function, for example, a storage or digital oscilloscope or a high speed data ac

42、quisition system. The waveform measurement/capture device shall be able to record the waveform from the beginning of the islanding test until the EUT ceases to energize the island. For multi-phase EUT, all phases shall be monitored. A waveform monitor designed to detect and calculate the run-on time

43、 may be used. For multi-phase EUT, the test and measurement equipment shall record each phase current and each phase-to-neutral or phase-to-phase voltage, as appropriate, to determine fundamental frequency active and reactive power flow over the duration of the test. A sampling rate of 10 kHz or hig

44、her is recommended. The minimum measurement accuracy shall be 1 % or less of rated EUT nominal output voltage and 1 % or less of rated EUT output current. Current, active power, and reactive power measurements through switch S1 used to determine the circuit balance conditions shall report the fundam

45、ental (50 Hz or 60 Hz) component. 5.2 DC power source 5.2.1 General A DC power source, such as a PV array simulator, a PV array, or a current and voltage limited DC power supply with series resistance may be used. If the EUT can operate in utility-interconnected mode from a storage battery, a DC pow

46、er source may be used in lieu of a battery as long as the DC power source shall not be the limiting device as far as the maximum EUT input current is concerned. The DC power source shall provide voltage and current necessary to meet the testing requirements described in Clause 6. BS EN 62116:2014 12

47、 IEC 62116:2014 IEC 2014 5.2.2 PV array simulator A unit intended to be energized directly from a photovoltaic source shall be energized from a supply that simulates the current-voltage characteristics and time response of a photovoltaic array. The tests shall be conducted at the input voltage defin

48、ed in Table 2 below, and the current shall be limited to 1,5 times the rated photovoltaic input current, except when specified otherwise by the test requirements. A PV array simulator is recommended, however, any type of power source may be used if it does not influence the test results. Table 2 Spe

49、cification of array simulator (test conditions) Items aConditions Output power Sufficient to provide maximum EUT output power and other levels specified by test conditions of Table 5. Response speed bThe response time of a simulator to a step in output voltage, due to a 5 % load change, should result in a settling of the output current to within 10 % of its final value in less than 1 ms. Stability Excluding the variations caused by the EUT MPPT, simulator output power should remain stable within 2 % of spe