Netherlands Technical Agreement NTA (en)

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1 Dit document mag slechts op een stand-alone PC worden geinstalleerd. Gebruik op een netwerk is alleen. toestaan als een aanvullende licentieovereenkomst voor netwerkgebruik met NEN is afgesloten. This document may only be used on a stand-alone PC. Use in a network is only permitted when a supplementary license agreement for us in a network with NEN has been concluded. Netherlands Technical Agreement NTA 8030 (en) Guidelines for product specifications of grid connected inverters for Distributed Energy Resources (DER) Richtlijnen voor productspecificaties van omvormers toegepast in netgekoppelde decentrale opwekkers (DCO) ICS january 2006

2 NTA 8030 Nederlands Elektrotechnisch Comité (NEC) Normcommissie NEC 82 "Zonne-energiesystemen" Apart from exceptions provided by the law, nothing from this publication may be duplicated and/or published by means of photocopy, microfilm, storage in computer files or otherwise, which also applies to full or partial processing, without the written consent of the Netherlands Standardization Institute. The Netherlands Standardization Institute shall, with the exclusion of any other beneficiary, collect payments owed by third parties for duplication and/or act in and out of law, where this authority is not transferred or falls by right to the Reproduction Rights Foundation. Auteursrecht voorbehouden. Behoudens uitzondering door de wet gesteld mag zonder schriftelijke toestemming van het Nederlands Normalisatie-instituut niets uit deze uitgave worden verveelvoudigd en/of openbaar gemaakt door middel van fotokopie, microfilm, opslag in computerbestanden of anderszins, hetgeen ook van toepassing is op gehele of gedeeltelijke bewerking. Het Nederlands Normalisatie-instituut is met uitsluiting van ieder ander gerechtigd de door derden verschuldigde vergoedingen voor verveelvoudiging te innen en/of daartoe in en buiten rechte op te treden, voor zover deze bevoegdheid niet is overgedragen c.q. rechtens toekomt aan de Stichting Reprorecht. Although the utmost care has been taken with this publication, errors and omissions cannot be entirely excluded. The Netherlands Standardization Institute and/or the members of the committees therefore accept no liability, not even for direct or indirect damage, occurring due to or in relation with the application of publications issued by the Netherlands Standardization Institute. Hoewel bij deze uitgave de uiterste zorg is nagestreefd, kunnen fouten en onvolledigheden niet geheel worden uitgesloten. Het Nederlands Normalisatie-instituut en/of de leden van de commissies aanvaarden derhalve geen enkele aansprakelijkheid, ook niet voor directe of indirecte schade, ontstaan door of verband houdend met toepassing van door het Nederlands Normalisatie-instituut gepubliceerde uitgaven Nederlands Normalisatie-instituut Postbus 5059, 2600 GB Delft Telefoon (015) , Fax (015)

3 Contents Foreword Scope Normative references Definitions Specification contents Product identification Hardware identification Picture of hardware Inverter (basic configuration) Optional items Software identification Inverter description Intended use Block diagram Interface description External equipment description Interface identification Electrical interfaces Mechanical interfaces User interfaces Inverter characteristics Normative references Software controlled functions and parameters Performance Operating conditions Losses Efficiency Power factor Response times Absolute maximum ratings Safety provisions General Protection mechanism Physical characteristics Enclosure Dimensions Connectors Mass Cooling Reliability Environmental conditions Climate Operating Storage Transport Nameplates and product marking Acoustic noise Maintenance Quality assurance Installation requirements...19 Annex A (informative) Example specification

4 Foreword Technical devices that can be purchased by installers or end users shall have a product specification to ensure an adequate and safe use of the product. NTA 8030 gives requirements for the product specification of inverters for grid connected Distributed Energy Resources (DER) such as Photovoltaic (PV) systems and Combined Heat and Power (CHP) systems. It consists of a list of items, dimensions and descriptions to be included in the inverter's specification. Although each type of DER has its own characteristics part of which asks for a specific approach, the various types of DER inverters have much in common. This NTA is primarily written for inverters for PV, one of the most implemented distributed energy resources in private buildings. Inverters for other types of DER can also be specified using this document. Paragraphs describing properties specific for PV shall be interpreted for the applicable type of DER. The use of this NTA guarantees a uniform way of specifying inverters and enables a good comparison of different inverters. Two types of specification are presented, a Short Form (SF) and an Extended Specification (ES). The SF is a specification for comparing different inverters. It mainly consists of performance data, electrical and mechanical interfaces, and environmental conditions. The SF is intended to describe the inverter in a few pages with tables as a leaflet. The ES describes the inverter in all its aspects. In addition to the SF the ES also gives information about the use and operating modes of the inverter, fuses and installation requirements. The ES is more text oriented and can have the form of a booklet. Both specifications are intended for the end user and the installer. At the end of this NTA an example is given of an SF. NTA 8030 was written by the Energy research Centre of the Netherlands (ECN), under the auspices of NEC 82. Ing. P.J.M. Heskes ECN author / co-ordinator Ing. P.M. Rooij ECN author Ir. J.M.M. Welschen Philips Lighting B.V. co-author Ir. A. van Zwam Mastervolt B.V. co-author Ing. D. Bassie Mastervolt B.V. co-author Ir. H. Oldenkamp OKE-Services co-author 2

5 Guidelines for product specifications of grid connected inverters for Distributed Energy Resources (DER) 1 Scope This document gives requirements for the product specifications of inverters for grid connected Distributed Energy Resources (DER) for single phase or multi phase connections feeding up to 25 A per phase into the utility low-voltage grid. The inverters are intended for long-term operation indoor (conditioned or unconditioned) or outdoor in general open-air climates as defined in IEC (protected or unprotected). The document addresses inverters in all kind of DER systems such as Photovoltaic (PV) systems, small wind turbines or Combined Heat Power (CHP) systems. The CHP systems may be based on a fuel cell technology or on Stirling engine or any other technology. 2 Normative references This standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of the publications apply to this standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). NTA 8494:2004 NEN-EN-IEC 60068:series Qualification measurements for grid-connected (PV) inverters Environmental testing NEN-EN-IEC Degrees of protection provided by enclosures (IP Code) NEN-IEC Insulation coordination for equipment with low-voltage systems. Part 1: Principles, requirements and tests NEN-EN-IEC NEN-EN-IEC NEN-EN-IEC NEN-EN-IEC NEN-EN-IEC NEN-IEC UL 94 MIL-HDBK-217 Classification of environmental conditions Part 1: Environmental parameters and their severities Information technology equipment Safety Part 1: General requirements Electromagnetic compatibility (EMC) Part 6-1: Generic standards Immunity for residential, commercial and lightindustrial environments Electromagnetic compatibility (EMC) Part 6-3: Generic standards Emission standard for residential, commercial and light-industrial environments Balance-of-system components for photovoltaic systems Design qualification natural environments Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) Tests for flammability of plastic materials for parts in devices and appliances Reliability prediction of electronic equipment 3

6 3 Definitions For the purpose of this document the following definitions apply. 3.1 grid public low-voltage distribution network, also known as DNO's network or utility distribution system 3.2 inverter converter of DC electric power (from e.g. PV or CHP systems) to AC electric power (to be fed into the grid) 3.3 V throughout this document the character V is used for voltage NOTE: The use of character U for voltage is also allowed. 4 Specification contents This NTA gives requirements for the product specification of inverters for grid connected DER. Two types of specification are allowed. One specification gives an overview of the main characteristics of the inverter and is called SF. The second specification gives a complete overview and is called ES. This chapter gives requirements for the SF and the ES. It specifies those items that shall be at least included in the specifications. Item to be included in specification SF ES Hardware identification Picture of hardware Inverter (basic configuration) Optional items Software identification Inverter description Intended use Block diagram Interface description External equipment description Interface identification Electrical interfaces Grid Distributed Energy Resource Communication Mechanical interfaces User interfaces Inverter characteristics Normative references Software controlled functions and parameters 4

7 Item to be included in specification SF ES Performance Operating mode DER side Grid side Losses Efficiency Power factor Response times Absolute maximum ratings Safety provisions General Protection mechanism Fuses Safety functions and circuits Physical characteristics Enclosure Dimensions Connectors DER connection Grid connection Communication connection Mass Cooling Reliability Environmental conditions Climate Operating Storage Transport Nameplates and product marking Acoustic noise Maintenance Quality assurance Installation requirements 5

8 5 Product identification 5.1 Hardware identification The hardware can be identified in many different ways. There are differences in settings for local codes, modifications, options, etc. The documentation of the hardware shall be in such a way that the identification on the nameplate or a display (software read-out), including suffixes, tells the reader what the configuration of the product is Picture of hardware A picture of the product shall be included in the specification. The picture must show at least the basic configuration of the inverter including the accompanying hardware such as inverter; cables and connectors; manual; CD with software Inverter (basic configuration) Description of the basic configuration of the inverter. This is the identification of the minimum configuration or the configuration of the product sold. There shall be a clear relationship between the identification of the product, see 5.1.1, the identification of the inverter as basic configuration and the identification of the options. Item Brand Explanation Name of the manufacturer or organisation Model name Type number Revision Serial number Manufacturing date Region of application Name of the model or the model range Identification number or ordering code Revision number of the inverter including options Identification of the individual product Date of manufacturing The country or countries for which the inverter is intended The inverter may be specified for use in one or more specific country(ies) but also for a variety of countries where for example the software sets up the inverter for a specified country Optional items Optional items are features that may be chosen to replace or enhance the basic configuration. There is no need to have one or more optional items. The identification specifies a single optional item or a selection of optional items. 6

9 Item (if applicable) New type number (or extension) of inverter Explanation Identification number or ordering code of the basic configuration including this option Brand Model name Type number Revision Serial number Name of the manufacturer or organisation Name of the model or the model range Identification number or ordering code Revision number of the inverter including options Identification of the individual product Manufacturing date Region of application Date of manufacturing The country or countries for which the option is intended 5.2 Software identification The inverter or one of the optional items may incorporate software or firmware. Specification of the software is obligatory unless the software forms an integral part of the hardware and cannot be replaced by a later version. Item (if applicable) Main software Explanation Description (name and revision) of the main software Communication software Utility interface requirement Description (name and revision) of the communication software Description (name and revision) of the anti-islanding software Other Description (name and revision) of the software 6 Inverter description 6.1 Intended use This part of the product specification describes the purpose and use of the inverter. 6.2 Block diagram The main functionalities of the inverter shall be depicted in a block diagram and general information shall be given about the inverter such as: Item Transformer Inverter topology Anti-islanding device Explanation Applied transformer type, e.g. low frequency, high frequency, none Short description of inverter topology, e.g. LF, HF, IGBT, other Description of the applied principle 7

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