Recommendations for small renewable energy and hybrid systems for rural electrification - Part 7: Generators

IEC/TS 62257-7:2008(E) specifies the general requirements for generators (maximum power = 100 kVA) in decentralized rural electrification systems. Points out the main items that must be considered when selecting, sizing, installing, operating and maintaining this equipment. Is a general introduction followed by more specific documents dedicated to the generation technologies which are the most currently used in rural electrification projects.

Priporočila za sisteme malih obnovljivih virov energije in hibridne sisteme za elektrifikacijo podeželja - 7. del: Generatorji

General Information

Status
Not Published
Current Stage
PPUB - Publication issued
Start Date
09-Apr-2008

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SLOVENSKI STANDARD
SIST-TS IEC/TS 62257-7:2008
01-november-2008
3ULSRURþLOD]DVLVWHPHPDOLKREQRYOMLYLKYLURYHQHUJLMHLQKLEULGQHVLVWHPH]D
HOHNWULILNDFLMRSRGHåHOMDGHO*HQHUDWRUML

Recommendations for small renewable energy and hybrid systems for rural electrification

- Part 7: Generators
Ta slovenski standard je istoveten z: IEC/TS 62257-7
ICS:
27.190 Biološki viri in drugi Biological sources and
alternativni viri energije alternative sources of energy
29.160.20 Generatorji Generators
SIST-TS IEC/TS 62257-7:2008 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS IEC/TS 62257-7:2008
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SIST-TS IEC/TS 62257-7:2008
IEC/TS 62257-7
Edition 1.0 2008-04
TECHNICAL
SPECIFICATION
Recommendations for small renewable energy and hybrid systems for rural
electrification –
Part 7: Generators
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
ICS 27.160; 27.180 ISBN 2-8318-9671-1
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SIST-TS IEC/TS 62257-7:2008
– 2 – TS 62257-7 © IEC:2008(E)
CONTENTS

FOREWORD...........................................................................................................................3

INTRODUCTION.....................................................................................................................5

1 Scope...............................................................................................................................6

2 Normative References ......................................................................................................6

3 Terms and definitions .......................................................................................................6

4 General ............................................................................................................................8

5 Generator boundaries.......................................................................................................8

6 Generators requirements ..................................................................................................9

6.1 General requirements..............................................................................................9

6.2 Specific requirements for the different technologies.................................................9

6.2.1 Input requirements ......................................................................................9

6.2.2 Output requirements ..................................................................................11

6.2.3 Specific requirements for different generator technologies.........................11

7 Generator design and sizing ...........................................................................................12

8 Hybrid generation ...........................................................................................................12

Bibliography..........................................................................................................................13

Figure 1 – General electrical configuration of a collective electrification system......................8

Table 1 – General inputs and outputs to be considered for generator specification .................9

Table 2 – Input requirements relative to the generator technology ..........................................9

Table 3 – Output requirements relative to the generator technology......................................11

Table 4 – Specific generators requirements considered in the IEC 62257 series...................12

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SIST-TS IEC/TS 62257-7:2008
TS 62257-7 © IEC:2008(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RECOMMENDATIONS FOR SMALL RENEWABLE ENERGY
AND HYBRID SYSTEMS FOR RURAL ELECTRIFICATION –
Part 7: Generators
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

The main task of IEC technical committees is to prepare International Standards. In

exceptional circumstances, a technical committee may propose the publication of a technical

specification when

• the required support cannot be obtained for the publication of an International Standard,

despite repeated efforts, or

• the subject is still under technical development or where, for any other reason, there is the

future but no immediate possibility of an agreement on an International Standard.

Technical specifications are subject to review within three years of publication to decide

whether they can be transformed into International Standards.

IEC 62257-7, which is a technical specification, has been prepared by IEC technical

committee 82: Solar photovoltaic energy systems.

This document is based on IEC/PAS 62111; it cancels and replaces the relevant parts of

IEC/PAS 62111.
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SIST-TS IEC/TS 62257-7:2008
– 4 – TS 62257-7 © IEC:2008(E)

This technical specification is to be used in conjunction with the future parts of this series as

and when they are published.
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
82/492/DTS 82/507/RVC

Full information on the voting for the approval of this technical specification can be found in

the report on voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of IEC 62257 series, under the general title: Recommendations for small

renewable energy and hybrid systems for rural electrification, can be found on the IEC

website.

The committee has decided that the contents of this publication will remain unchanged until

the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in

the data related to the specific publication. At this date, the publication will be

• transformed into an International standard;
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
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SIST-TS IEC/TS 62257-7:2008
TS 62257-7 © IEC:2008(E) – 5 –
INTRODUCTION

The IEC 62257 series of documents intends to provide to different players involved in rural

electrification projects (such as project implementers, project contractors, project supervisors,

installers, etc.) documents for the setting-up of renewable energy and hybrid systems with

a.c. voltage below 500 V, d.c. voltage below 750 V and power below 100 kVA.
These documents are recommendations
– to choose the right system for the right place;
– to design the system;
– to operate and maintain the system.

These documents are focused only on rural electrification, concentrating on but not specific

to, developing countries. They must not be considered as all-inclusive to rural electrification.

The documents try to promote the use of renewable energies in rural electrification; they do

not deal with clean development mechanisms at this time (CO emission, carbon credit, etc.).

Further developments in this field could be introduced in future steps.

This consistent set of documents is best considered as a whole with different parts

corresponding to items for safety, sustainability of systems and at the lowest life-cycle cost as

possible. One of the main objectives is to provide the minimum sufficient requirements,

relevant to the field of application, that is, small renewable energy and hybrid off-grid

systems.

The purpose of this part of IEC 62257 is to provide project implementers with general

information about generators and to highlight the main characteristics relative to the different

technologies that can be used.
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SIST-TS IEC/TS 62257-7:2008
– 6 – TS 62257-7 © IEC:2008(E)
RECOMMENDATIONS FOR SMALL RENEWABLE ENERGY
AND HYBRID SYSTEMS FOR RURAL ELECTRIFICATION –
Part 7: Generators
1 Scope

The purpose of this part of IEC 62257 is to specify the general requirements for generators

(maximum power = 100 kVA) in decentralized rural electrification systems.

The aim is to point out the main items that must be considered when selecting, sizing,

installing, operating and maintaining this equipment.

This technical specification is a general introduction followed by more specific documents

dedicated to the generation technologies which are the most currently used in rural

electrification projects.
2 Normative References

The following referenced documents are indispensable for the application of this document.

For dated references, only the edition cited applies. For undated references, the latest edition

of the referenced document (including any amendments) applies.

IEC/TS 62257-2:2004, Recommendations for small renewable energy and hybrid systems for

rural electrification – Part 2: From requirements to a range of electrification systems

IEC/TS 62257-4, Recommendations for small renewable energy and hybrid systems for rural

electrification – Part 4: System selection and design

IEC/TS 62257-5, Recommendations for small renewable energy and hybrid systems for rural

electrification – Part 5: Protection against electric hazards

IEC/TS 62257-7-1, Recommendations for small renewable energy and hybrid systems for

rural electrification – Part 7-1: Generators – Photovoltaic arrays

IEC/TS 62257-7-3, Recommendations for small renewable energy and hybrid systems for

rural electrification – Part 7-3: Generating set – Selection of generating sets for rural

electrification systems

IEC/TS 62257-9-1 , Recommendations for small renewable energy and hybrid systems for

rural electrification – Part 9-1: Micropower systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
___________
To be published.
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SIST-TS IEC/TS 62257-7:2008
TS 62257-7 © IEC:2008(E) – 7 –
3.1
generator
apparatus that converts one form of energy into electricity
[IEC 61836, 3.3.25, modified]
3.2
dispatchable power system
power s
...

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