IEC TS 62257-4:2005

Recommendations for small renewable energy and hybrid systems for rural electrification - Part 4: System selection and design

Provides a method for describing the results to be achieved by the electrification system independently of the technical solutions that could be implemented. Lists the functional requirements that shall be achieved by the production and distribution subsystems.

General Information

• Status: Published
• Publication Date: 24-Jul-2005
• 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 62257-4:2015 - Recommendations for renewable energy and hybrid systems for rural electrification - Part 4: System selection and design
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC/TS 62257-4 ®
Edition 1.0 2005-07
TECHNICAL
SPECIFICATION
Recommendations for small renewable energy and hybrid systems for rural
electrification –
Part 4: System selection and design

IEC/TS 62257-4:2005(E)
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IEC/TS 62257-4 ®
Edition 1.0 2005-07
TECHNICAL
SPECIFICATION
Recommendations for small renewable energy and hybrid systems for rural
electrification –
Part 4: System selection and design

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 27.160; 27.180 ISBN 2-8318-8101-3

– 2 – TS 62257-4  IEC:2005(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 Functional requirements of production and distribution subsystems.9
4.1 Preliminaries .9
4.2 Overall needs to be satisfied .9
4.3 Introduction to subsystems.13
4.4 Functional description of a production subsystem.13
4.5 Functional description of a distribution subsystem .15
4.6 Functional description of a demand subsystem.17
4.7 Constraints to be complied with by production distribution and demand subsystems 17
5 Energy management rules .18
5.1 General .18
5.2 Functional description for an energy management of an isolated system .19
5.3 Demand side management .20
6 Expected results from the sizing process.20
6.1 Introduction .20
6.2 Participants in the sizing process .21
6.3 Elements for comparing various design proposals .21
6.4 Frameworks for proposal .21
6.5 Proposal for a sizing process .38
6.6 Impact of design assumptions on system sizing and cost .38
6.7 Guarantee of results.40
7 Data acquisition rules for system management.40
7.1 Introduction .40
7.2 General .41
7.3 Levels of data acquisition and data necessity. .41
7.4 Data to be collected .46
7.5 Operating conditions, electrical and engineering requirements for data
acquisition.47

Annex A (informative) Example for detailed performance criteria and levels

for a production subsystem .48
Annex B (informative) Example for detailed performance criteria and levels
for a distribution subsystem .49
Annex C (informative) Example framework for proposal specification.50
Annex D (informative) Equation for costs calculations.57
Annex E (informative) Proposal for a sizing process .61

Figure 1 – Factors involved in the design of a system .10
Figure 2 – Functional diagram of a radial structure for rural micro-grid.17
Figure 3 – Functional impact of energy management and safety .19
Figure E.1 – Sizing process flow chart .61

TS 62257-4  IEC:2005(E) – 3 –

Table 1 – Participants in the sizing process .21
Table 2 – Perspectives to be considered (see symbols in IEC 62257-2, Table 4) .22
Table 3 – Commitments indicators .23
Table 4 – Knowledge of site.24
Table 5 – Knowledge of consumption data .25
Table 6 – Knowledge of resources: data accuracy levels .25
Table 7 – Knowledge of resources: data retained for considered site .27
Table 8 – Knowledge of resources: range of data history .27
Table 9 – Characteristics for photovoltaic modules .28
Table 10 – Characteristics for modules supporting structure .28
Table 11 – Characteristics for the wind turbine .29
Table 12 – Characteristics for wind turbine structure.29
Table 13 – Characteristics for the generator set.30
Table 14 – Characteristics for micro hydro turbines .31
Table 15 – Characteristics for biomass generators.32
Table 16 – Characteristics for power converters .33
Table 17 – Characteristics for load manager/meter .34
Table 18 – Characteristics for system controllers .35
Table 19 – Characteristics for batteries.35
Table 20 – Characteristics for links and wiring .36
Table 21 – Energy output from renewable energies .36
Table 22 – Energy output from fossil energies .36
Table 23 – Energy output from storage .36
Table 24 – Incidence of energy management assumptions on system sizing.39
Table 25 – Incidence of cost management assumptions on system dimensions .40
Table 26 – Information required by the energy manager and data to collect .42
Table 27 – Information required by the operator and data to collect .44
Table 28 – Information required by the user and data to collect .45
Table 29 – Summary of the needed information .45
Table 30 – Minimum set of data to be collected .46
Table 31 – Relationship between required information and system architecture .47
Table E.1 – Description of utilities to be power supplied .62
Table E.2 – Consumption characteristics .63
Table E.3 – Meteorological data used for sizing .64
Table E.4 – Proposals for types of cost to be accounted for.64
Table E.5 – Site constraints inventory.65
Table E.6 – Impact of energy management assumptions on plant sizing .66
Table E.7 – Impact of cost management assumptions on plant sizing .66

– 4 – TS 62257-4  IEC:2005(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RECOMMENDATIONS FOR SMALL RENEWABLE ENERGY
AND HYBRID SYSTEMS FOR RURAL ELECTRIFICATION –

Part 4: System selection and design

FOREWORD
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