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

Proposes a methodological approach for the setting up and carrying out of socio-economic studies as part of the framework of decentralized rural electrification projects. Also provides some structures as technical solutions that could be recommended, depending on the qualitative and quantitative energy demands, consistent with the needs and financial situation of the customers. Proposes electrical architectures to technical project managers to assist them in the design of the systems.

General Information

• Status: Published
• Publication Date: 26-May-2004
• ICS: 27.160 - Solar energy engineering
• ICS: 27.180 - Wind turbine energy systems
• Technical Committee: TC 82 - Solar photovoltaic energy systems
• Drafting Committee: JWG 1 - TC 82/JWG 1
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 11-Dec-2015

Relations

• Revised: IEC TS 62257-2:2015 - Recommendations for renewable energy and hybrid systems for rural electrification - Part 2: From requirements to a range of electrification systems
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC/TS 62257-2 ®
Edition 1.0 2004-05
TECHNICAL
SPECIFICATION
Recommendations for small renewable energy and hybrid systems for rural
electrification –
Part 2: From requirements to a range of electrification systems

IEC/TS 62257-2:2004(E)
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IEC/TS 62257-2 ®
Edition 1.0 2004-05
TECHNICAL
SPECIFICATION
Recommendations for small renewable energy and hybrid systems for rural
electrification –
Part 2: From requirements to a range of electrification systems

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 27.160; 27.180 ISBN 2-8318-7525-0

– 2 – TS 62257-2  IEC:2004(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7

1 Scope.8
2 Normative references.8
3 Terms and definitions .9
4 Methodology for non technical preliminary studies .10
4.1 Place and role of preliminary studies in a decentralized rural electrification
project.10
4.2 Specifications of the preliminary study .10
4.3 The stages of a socio-economic study.15
5 Classification of electrification systems .15
5.1 Introduction to a range of systems .15
5.2 Users requirements .16
5.3 Typology of qualitative requirements .16
5.4 Typology of quantitative requirements .17
5.5 Classification for electricity services provided.18
5.6 Assisted selection of production subsystem .18
5.7 Typology of decentralized electrification systems .18
6 Electrification systems architecture .21
6.1 General .21
6.2 General presentation of isolated electrification systems.21
6.3 Combining subsystems .22
6.4 Functional diagrams .24
6.5 Related references .25
6.6 Limits between production, distribution and demand/application subsystems .25
6.7 Summary of the different electrification system types .25

Annex A (informative) Stages of a socio-economic study (see Clause 4).26
A.1 General .26
A.2 Preparation phase .26
A.3 Drawing up of the questionnaires, choice of surveyors and choice of sample .27
A.4 Conducting the survey - Analysis of the results.27
A.5 Extrapolation of the results .27

Annex B (informative) Analysis of the type of receivers installed versus types of use and
demonstrating seasonable variability (where applicable) (see Clause 5).28
B.1 Domestic use.28
B.2 Analysis of the type of receivers versus usage types .30

Annex C (informative) Supply quality indicators for isolated electrification systems (see
Clause 5) .32

TS 62257-2  IEC:2004(E) – 3 –
Annex D (informative) Assisted selection of production subsystem (see Clause 5) .34
D.1 Characteristics of possible production subsystems .34
D.2 Assisted selection of a decentralized production system suited to the requirement.34

Annex E (informative) Functional diagrams (See Clause 6).36
E.1 Glossary of symbols.36
E.2 Architectures of systems.37

Figure 1 – Example of the content of a non technical preliminary study .11
Figure 2 – Systems architecture and dispatchable energy.19
Figure 3 – General configuration of an electrification system.23
Figure A.1 – Flowchart of the stages of a socio economic study.26
Figure D.1 – Better adequacy of production subsystems solutions with supply
availability and daily duration of service .35
Figure E.1 – Type T I-a system .38
Figure E.2 – Type T I-b system .39
Figure E.3 – Type T I-c system .40
Figure E.4 – Type T I-d system .41
Figure E.5 – Type T I system .43
Figure E.6 – Type T I-a system .45
Figure E.7 – Type T I-b system .46
Figure E.8 – Type T I system .48
Figure E.9 – Type T I system .49
Figure E.10 – Type T I system .50
Figure E.11 – General architecture of a micropower plant supplying a microgrid .52
Figure E.12 – Type T C system.53
Figure E.13 – Type T C-a system .55
Figure E.14 – Type T C-b system.56
Figure E.15 – Type T C-a system.58
Figure E.16 – Type T C-b system.59
Figure E.17 – Type T C system.61
Figure E.18 – Type T C system .63
Table 1 – Application types and types of uses.16
Table 2 – Expected quality of the supply.17
Table 3 – Synthesis of quantitative requirements/category (examples of type of user
and use) .17
Table 4 – Typology of decentralized electrification systems.18
Table 5 – Preliminary range of relevant (as a minimum) decentralized electrification
systems .20
Table 6 – Recapitulation of characteristics of different types of isolated electrification
systems .25
Table C.1 – Combined categorization .32
Table C.2 – Service specification (example) .33

– 4 – TS 62257-2  IEC:2004(E)
Table D.1 – Principles and characteristics of production subsystems .34
Table E.1 – Glossary of symbols .36
Table E.2 – List of cases, type T I.37
Table E.3 – List of cases, type T I.44
Table E.4 – List of cases, type T C .54
Table E.5 – List of cases, type T C .57
TS 62257-2  IEC:2004(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RECOMMENDATIONS FOR SMALL RENEWABLE ENERGY
AND HYBRID SYSTEMS FOR RURAL ELECTRIFICATION –

Part 2: From requirements to a range of electrification systems

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