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As 4777.3-2005 Grid Connection of Energy Systems via Inverters Grid Protection Requirements | Electrical Grid | Electrical Wiring
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AS 4777.
AS 4777.32005
Grid connection of energy systems via inverters Part 3: Grid protection requirements
This Australian Standard was prepared by Committee EL-042, Renewable Energy Power Supply Systems and Equipment. It was approved on behalf of the Council of Standards Australia on 6 April 2005. This Standard was published on 20 May 2005.
The following are represented on Committee EL-042: Alternative Technology Association Australian Electrical and Electronic Manufacturers Association Business Council for Sustainable Energy Electrical Regulatory Authorities Council Electrical Safety Organisation, New Zealand Electricity Engineers Association, New Zealand ElectroComms & Energy Utilities Industries Skills Council Energy Efficiency & Conservation Authority of New Zealand Energy Networks Association Institution of Professional Engineers, New Zealand Ministry of Economic Development, New Zealand National Electrical and Communications Association New Zealand Electrical Institute Research Institute for Sustainable Energy Sustainable Energy Authority, Victoria University of New South Wales
This Standard was issued in draft form for comment as DR 04342.
Originated as AS 4777.32002. Second edition 2005.
COPYRIGHT Standards Australia All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Standards Australia GPO Box 5420, Sydney, NSW 2001, Australia ISBN 0 7337 6702 8
This Standard was prepared by the Australian members of the Joint Standards Australia/Standards New Zealand Committee EL-042, Renewable Energy Power Supply Systems and Equipment and is based on requirements developed by a group of utility, photovoltaic and inverter industry experts coming together under the auspices of the Energy Networks Association. After consultation with stakeholders in both countries, Standards Australia and Standards New Zealand decided to develop this Standard as an Australian, rather than an Australian/New Zealand Standard. This Standard replaces AS 4777.32002 on publication. The objective of this Standard is to provide regulators, electricity distributors and manufacturers with the requirements and tests for grid protection devices to be used in inverter energy systems intended for the injection of electric power through an electrical installation to the electricity distribution network. It is Part 3 of AS 4777, Grid connection of energy systems via inverters which is published in parts as follows: AS 4777.1 Part 1: Installation requirements AS 4777.2 Part 2: Inverter requirements AS 4777.3 Part 3: Grid protection requirements (this Standard) This Standard has been revised to (a) (b) simplify requirements for EMC; and clarify the grid performance test including tolerances on test values.
This Standard was developed with the assistance of the following organisations (i) (ii) Australian Greenhouse Office; Research Institute for Sustainable Energy, Murdoch University; and
(iii) University of New South Wales. The terms normative and informative have been used in this Standard to define the application of the Appendix to which they apply. A normative Appendix is an integral part of a Standard whereas an informative Appendix is only for information and guidance.
Page SCOPE........................................................................................................................ 4 NORMATIVE REFERENCES ................................................................................... 4 DEFINITIONS............................................................................................................ 5 GENERAL AND SAFETY REQUIREMENTS.......................................................... 6 GRID PROTECTION REQUIREMENTS .................................................................. 6
APPENDICES A LIMITS FOR SUSTAINED OPERATION.................................................................. 9 B GRID PROTECTION DEVICE TESTS .................................................................... 10
STANDARDS AUSTRALIA Australian Standard Grid connection of energy systems via inverters Part 3: Grid protection requirements
1 SCOPE This Standard specifies the requirements for grid protection devices intended to be used in inverter energy systems, with ratings up to 10 kVA for single-phase units, or up to 30 kVA for three-phase units, and for the injection of electric power through an electrical installation to the electricity distribution network.
NOTES: 1 2 3 Although this Standard does not apply to larger systems, similar principles can be used for the grid protection of such systems. These devices do not replace devices used for protection and/or isolation as required in AS/NZS 3000. Although this Standard is written on the basis that the renewable energy is from a d.c. source (e.g. photovoltaic array), this Standard may be used for systems where the energy is from a variable a.c. source (e.g. wind turbine or micro-hydro system) by appropriate changes to the tests. This Standard does not include EMC requirements. These requirements are mandated by the Australian Communications Authority (ACA). Users attention is drawn to Australian Communications Authoritys document Electromagnetic CompatibilityInformation for suppliers of electrical and electronic products in Australia and New Zealand for guidance.
2 NORMATIVE REFERENCES The following normative documents contain provisions which, through reference in this text, constitute provisions of this Standard. AS 60038 AS/NZS 3000 3100 60950 60950.1 61000 61000.3.3 Standard voltages Electrical Installations (known as the Australian/New Zealand Wiring Rules) Approval and equipment test specificationGeneral requirements for electrical
Information technology equipmentSafety Part 1: General requirements Electromagnetic compatibility (EMC) Part 3.3: LimitsLimitation of voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current less than or equal to 16 A per phase and not subject to conditional connection Part 3.5: LimitsLimitation of voltage fluctuations and flicker in lowvoltage power supply systems for equipment with rated current greater than 16 A
61000.3.5
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