1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationTest procedure of islanding prevention measures for utility-interconnected photovoltaic invertersBS EN 62116:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/11/2011
2、 07:28, Uncontrolled Copy, (c) BSINational forewordThis British Standard is the UK implementation of EN 62116:2011. It is identical to IEC 62116:2008. The common modifications introduced by CENELEC modifications are indicated in the text in red.The UK participation in its preparation was entrusted t
3、o 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 provisions of a contract. Users are responsible for its correct application. BSI
4、2011ISBN 978 0 580 55550 3 ICS 27.160Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2011.Amendments issued since publicationAmd. No. Date Text affectedB
5、RITISH STANDARDBS EN 62116:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/11/2011 07:28, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD EN 62116 NORME EUROPENNE EUROPISCHE NORM March 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Elect
6、rotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62116:2011 E ICS 27.160 English version Test procedure of isl
7、anding prevention measures for utility-interconnected photovoltaic inverters (IEC 62116:2008, modified) Procdure dessai des mesures de prvention contre lilotage pour onduleurs photovoltaques interconnects au rseau public (CEI 62116:2008, modifie) Prfverfahren fr Manahmen zur Verhinderung der Inselbi
8、ldung fr Versorgungsunternehmen in Wechselwirkung mit Photovoltaik-Wechselrichtern (IEC 62116:2008, modifiziert) This European Standard was approved by CENELEC on 2011-01-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
9、European Standard 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 Central Secretariat or to any CENELEC member. This European Standard exists in three official versions
10、(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 Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Aust
11、ria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United K
12、ingdom. BS EN 62116:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/11/2011 07:28, Uncontrolled Copy, (c) BSIEN 62116:2011 2 Foreword This European Standard consists of the text of the International Standard IEC 62116:2008 together with common modifications prepared by the Technical Co
13、mmittee CENELEC TC 82, Solar photovoltaic energy systems. The text of the draft was submitted to the formal vote (see BT decision D136/C054) and was accepted by CENELEC as EN 62116 on 2011-01-02. Attention is drawn to the possibility that some of the elements of this document may be the subject of p
14、atent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2012-01-02 latest da
15、te by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-01-02 This European Standard consists of IEC 62116:2008 with some common modifications that have been developed within CLC/TC 82 and are identified in red and/or by a vertical line in the left margin of the te
16、xt. The scope of the common modifications is to add more detailed information on the application of the test procedure of islanding prevention measures. _ BS EN 62116:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/11/2011 07:28, Uncontrolled Copy, (c) BSI 3 EN 62116:2011 Contents Intr
17、oduction 41 Scope and object 52 Normative references . 53 Terms and definitions 54 Testing circuit . 75 Testing equipment 85.1 Measuring instruments . 85.2 DC power source . . 85.2.1 PV array simulator . 95.2.2 PV array . . 95.2.3 Current and voltage limited DC power supply with series resistance .
18、95.3 AC power source 105.4 AC loads . . 106 Test for single or multi-phase inverter . 106.1 Test procedure. . 106.2 Pass/fail criteria 137 Documentation . . 14Annex A (informative) Islanding as it applies to PV systems. 17Annex B (informative) Test for independent islanding detection device (relay)
19、. 19Annex C (informative) Gate blocking signal . . 21Bibliography . 22Figure 1 Test circuit for islanding detection function in a power conditioner (inverter) . .8Figure B.1 Test circuit for independent islanding detection device (relay) . 19Table 1 Parameters to be measured in real time 7Table 2 Sp
20、ecification of array simulator (test conditions)9Table 3 PV array test conditions .9Table 4 AC power source requirements 10Table 5 Test conditions . . 11Table 6 Load imbalance (active, reactive load) for test condition A 13Table 7 Load imbalance (reactive load) for test condition B (EUT output = 50
21、% 66 %) and test condition C (EUT output = 25 % 33 %) . 13Table 8 Specification of the EUT provided by manufacturer (example) . . 14Table 9 List of tested condition and run on time (example) . . 15Table 10 Specification of testing equipment (example) . 16BS EN 62116:2011Licensed Copy: Wang Bin, ISO/
22、EXCHANGE CHINA STANDARDS, 23/11/2011 07:28, Uncontrolled Copy, (c) BSIEN 62116:2011 4 Introduction Islanding is a condition in which a portion of an electric power grid, containing both load and generation, is isolated from the remainder of the electric power grid. This situation is one with which e
23、lectric power providers (utilities) must regularly contend. When an island is created purposely by the controlling utility to isolate large sections of the utility grid, for example it is called an intentional island. Conversely, an unintentional island can be created when a segment of the utility g
24、rid containing only customer-owned generation and load is isolated from the utility control. Normally, the customer-owned generation is required to sense the absence of utility-controlled generation and cease energizing the grid. However, when the generation and load within the segment are well bala
25、nced prior to the isolation event, the utility is providing little power to the grid segment, thus making it difficult to detect when the isolation occurs. Damage can occur to customer equipment if the generation in the island, no longer under utility control, operates outside of normal voltage and
26、frequency conditions. Customer and utility equipment can be damaged if the main grid recloses into the island out of synchronization. Energized lines within the island present a shock hazard to unsuspecting utility line-workers and network users who think the lines and their equipment are dead. The
27、PV Industry has pioneered the development of islanding detection and prevention measures. To satisfy the concerns of electric power providers, commercially-available utility-interconnected PV inverters have implemented a variety of islanding detection and prevention (also called anti-islanding) tech
28、niques. The industry has also developed a test procedure to demonstrate the efficiency of these anti-islanding techniques; that procedure is the subject of this document. This standard provides a consensus test procedure to evaluate the efficiency of islanding prevention measures used by the power c
29、onditioner 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-islanding d
30、evices 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 conditions
31、, the device will detect island conditions and cease to energize the public electric power grid. BS EN 62116:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/11/2011 07:28, Uncontrolled Copy, (c) BSI 5 EN 62116:2011 1 Scope and object The purpose of this European Standard is to provide
32、a test procedure to evaluate the performance of islanding prevention measures used with utility-interconnected PV systems. This standard does not specify settings parameters (voltage and frequency trip magnitude and trip time) nor pass/fail criteria, because the EN 50438 and/or National standards an
33、d/or grid codes should be taken into account for this purpose. This standard describes a guideline for testing the performance of automatic islanding prevention measures installed in or with single or multi-phase utility interactive PV inverters connected to the utility grid. The test procedure and
34、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 this standard are considered non-islanding as defined in CLC/TS 61
35、836. 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-based PV systems. Alternative testing procedures to evaluate th
36、e performance of islanding prevention may be allowed by national standards and/or grid codes. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition citied applies. For undated references, the latest ed
37、ition of the referenced document (including any amendments) applies. EN 61727, Photovoltaic (PV) systems Characteristics of the utility interface (IEC 61727) CLC/TS 61836, Solar photovoltaic energy systems Terms, definitions and symbols(IEC/TS 61836) EN 50438, Requirements for the connection of micr
38、o-generators in parallel with public low-voltage distribution networks 3 Terms and definitions For the purposes of this document, the terms and definitions of CLC/TS 61836 apply as well as the following. 3.1 PV array simulator DC power source used to simulate PV array output 3.2 EUT (Equipment Under
39、 Test) EUT indicates the inverter or anti-islanding device on which these tests are performed 3.3 MPPT (Maximum Power Point Tracking) MPPT is a PV array control strategy used to maximize the output of the system under the prevailing conditions BS EN 62116:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CH
40、INA STANDARDS, 23/11/2011 07:28, Uncontrolled Copy, (c) BSIEN 62116:2011 6 3.4 island a state in which a portion of the electric utility grid, containing load and generation, continues to operate isolated from the rest of the grid. The generation and loads may be any combination of customer-owned an
41、d utility-owned. 3.5 intentional island an island that is intentionally created, usually to restore or maintain power to a section of the utility grid affected by a fault. The generation and loads may be any combination of customer-owned and utility-owned, but there is an implicit or explicit agreem
42、ent between the controlling utility and the operators of customer-owned generation for this situation. 3.6 quality factor, Qfa measure of the strength of resonance of the islanding test load. NOTE In a parallel resonant circuit, such as a load on a power system LCRQ =fwhere Qfis quality factor R is
43、effective load resistance C is reactive load capacitance (including shunt capacitors) L is reactive load inductance On a power system with active power, P, and reactive powers, QL, for inductive load, and QCfor capacitive load, Qfcan be determined by ( )CLf QQP 1Q = where P is active power, in W QLi
44、s inductive load, in VAr QCis capacitive load, in VAr 3.7 run-on time, tRthe amount of time that an unintentional island condition exists. Run-on time is defined as the interval between the opening of the switch S1 (Figure 1) and the cessation of EUT output current. 3.8 stopping signal a signal prov
45、ided by the inverter indicating it has ceased energizing its utility grid-connected output terminals (See Annex C) 3.9 unintentional island an islanding condition in which the generation within the island that is supposed to cease energizing the utility grid instead continues to energize the utility
46、 grid BS EN 62116:2011Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/11/2011 07:28, Uncontrolled Copy, (c) BSI 7 EN 62116:2011 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 sh
47、own in Table 1 and Figure 1. Parameters to be recorded in the test report are discussed in Clause 7. Table 1 Parameters to be measured in real time Parameter Symbol Units EUT DC input a,bDC voltage DC current DC power Irradiance cVdc IdcPdc G V A W W/m EUT AC output AC voltage b, d, eAC current b, d
48、, eActive power bReactive power bVoltage waveform d, e, f, gCurrent waveformd, e, f, gEUT (relay) output control signal dRun-on time Stopping signal h VEUTIEUTPEUTQEUTtRSS V A W VA s - Test load bResistive load current Inductive load current Capacitive load current IRILICA A A AC (utility) power sou
49、rce bUtility active power iUtility reactive power iUtility current iPacQacIac W VAr A 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 voltage and current transducer shall be suitable for the sampling rate used. eThe wa
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