IEC TS 62257-4:2015(E) provides a method for describing the results to be achieved by the electrification system independently of the technical solutions that could be implemented. The purpose is to provide a method to assist project contractors and project developers to select and design the electrification system for isolated sites while matching the identified needs, such as those described in IEC TS 62257-2. The main technical changes with regard to the previous edition are as follows: – redefine the maximum AC voltage from 500 V to 1 000 V, the maximum DC voltage from 750 V to 1 500 V; – removal of the limitation of 100 kVA system size. This publication is to be read in conjunction with \/2.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4 Functional requirements of production and distribution subsystems 4.1 General <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4.2 Overall needs to be satisfied 4.2.1 Main factors to be considered 4.2.2 Needs and characteristics to be considered Figures Figure 1 \u2013 Factors involved in the design of a system <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Tables Table 1 \u2013 Technical factors \u2013 needs or characteristics to be considered Table 2 \u2013 Economic factors \u2013 needs and characteristics to be considered <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Table 3 \u2013 Site characteristics <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.3 Introduction to subsystems Table 4 \u2013 Regulations and requirements to be considered <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4.4 Functional description of a production subsystem 4.4.1 General 4.4.2 Detailed functions to be achieved by a production subsystem <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 4.4.3 Detailed performances criteria to be achieved by a production subsystem 4.5 Functional description of a distribution subsystem 4.5.1 Detailed functions to be achieved by a distribution subsystem (or rural micro-grid) <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 4.5.2 Detailed performances criteria to be achieved by a distribution subsystem <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 4.6 Functional description of a demand subsystem 4.7 Constraints to be complied with by production distribution and demand subsystems Figure 2 \u2013 Functional diagram of a radial structure for rural micro-grid <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 5 Energy management rules 5.1 General Figure 3 \u2013 Functional impact of energy management and safety <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.2 Functional description for an energy management of an isolated system <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 5.3 Demand side management 6 Expected results from the sizing process 6.1 Overview 6.2 Participants in the sizing process 6.3 Elements for comparing various design proposals Table 5 \u2013 Participants in the sizing process <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.4 Frameworks for proposal 6.4.1 General 6.4.2 General commitments to supply <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table 6 \u2013 Perspectives to be considered <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 6.4.3 Assumptions and classification of input Table 7 \u2013 Commitments indicators <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Table 8 \u2013 Knowledge of site <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Table 9 \u2013 Knowledge of consumption data Table 10 \u2013 Knowledge of resources: data accuracy levels <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 6.4.4 Technical characteristics for the main equipment proposed Table 11 \u2013 Knowledge of resources: data retained for considered site Table 12 \u2013 Knowledge of resources: range of data history <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 6.4.5 Characteristics for a photovoltaic array Table 13 \u2013 Characteristics for photovoltaic modules Table 14 \u2013 Characteristics for modules supporting structure <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 6.4.6 Characteristics for wind turbines Table 15 \u2013 Characteristics for the wind turbine Table 16 \u2013 Characteristics for wind turbine structure <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 6.4.7 Characteristics for the generator set Table 17 \u2013 Characteristics for the generator set <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 6.4.8 Characteristics for micro hydro turbines Table 18 \u2013 Characteristics for micro hydro turbines <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 6.4.9 Characteristics for biomass generators 6.4.10 Characteristics for power converters Table 19 \u2013 Characteristics for biomass generators <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Table 20 \u2013 Characteristics for power converters <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 6.4.11 Characteristics for the load manager\/meter 6.4.12 Characteristics for system controllers Table 21 \u2013 Characteristics for load manager\/meter <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 6.4.13 Characteristics for batteries Table 22 \u2013 Characteristics for system controllers Table 23 \u2013 Characteristics for batteries <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 6.4.14 Characteristics for links and wiring 6.4.15 Energy outputs Table 24 \u2013 Characteristics for links and wiring Table 25 \u2013 Energy output from renewable energies Table 26 \u2013 Energy output from fossil energies <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 6.4.16 Presentation of the costs 6.4.17 Design warranty Table 27 \u2013 Energy output from storage <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 6.4.18 Steps to reduce the impact of climatic hazards on system performance 6.4.19 Presentation of the environmental and social impact 6.4.20 Presentation of the socio- economic impact assessment 6.5 Proposal for a sizing process 6.6 Impact of design assumptions on system sizing and cost <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Table 28 \u2013 Incidence of energy management assumptions on system sizing <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | 6.7 Guarantee of results 7 Data acquisition rules for system management 7.1 Overview 7.2 General Table 29 \u2013 Incidence of cost management assumptions on system dimensions <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | 7.3 Levels of data acquisition and data necessity 7.3.1 General 7.3.2 Information to provide to the energy manager and relevant data to be collected <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Table 30 \u2013 Information required by the energy manager and data to collect <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | 7.3.3 Information to provide to the operator and relevant data to be collected <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | 7.3.4 Information to provide to the user and relevant data to be collected Table 31 \u2013 Information required by the operator and data to collect Table 32 \u2013 Information required by the user and data to collect <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | 7.3.5 Summary of the information required 7.3.6 Scientific data collection 7.4 Data to be collected Table 33 \u2013 Summary of the needed information <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Table 34 \u2013 Minimum set of data to be collected <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | 7.5 Operating conditions, electrical and engineering requirements for data acquisition Table 35 \u2013 Relationship between required information and system architecture <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Annexes Annex A (informative) Example for detailed performance criteria and levels for a production subsystem Table A.1 \u2013 Detailed performance criteria and levels for a production subsystem Table A.2 \u2013 Typical example of Table A.1 <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Annex B (informative) Example for detailed performance criteria and levels for a distribution subsystem Table B.1 \u2013 Detailed performance criteria and levels for a distribution subsystem Table B.2 \u2013 Typical example of Table B.2 <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Annex C (informative) Example framework for proposal specification C.1 Knowledge of site C.2 Knowledge of consumption data <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | C.3 Knowledge of resources <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | C.4 Technical characteristics for the main equipment proposed C.4.1 Photovoltaic modules C.4.2 Modules supporting structure C.5 Characteristics for wind turbines C.5.1 Wind turbine <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | C.5.2 Structure support C.6 Characteristics for the generator set <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | C.7 Characteristics for micro hydro turbine C.8 Characteristics for biomass generators C.9 Characteristics for power converters <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | C.10 Characteristics for load manager\/meter <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | C.11 Characteristics for system controllers C.12 Characteristics for battery <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | C.13 Energy outputs C.13.1 From renewable energies C.13.2 From fossil energies <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | Annex D (informative) Formula for costs calculations D.1 Yearly cash flow D.2 Calculation of total life cycle cost <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | D.3 Calculation of the levelized cost of energy D.4 Annualized maintenance, operating, and replacement expense <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | D.5 Further economic calculations applicable to energy businesses <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | Annex E (informative) Proposal for a sizing process E.1 General <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | E.2 Comments on the proposed sizing process E.2.1 General Figure E.1 \u2013 Sizing process flow chart <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | E.2.2 Step 01: Definition of power requirements to be fulfilled Table E.1 \u2013 Description of utilities to be power supplied <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | E.2.3 Step 02: Conversion of available weather data into relevant data Table E.2 \u2013 Consumption characteristics Table E.3 \u2013 Meteorological data used for sizing <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | E.2.4 Step 03: Statement of economic data to be accounted for E.2.5 Step 04: Inventory of the constraints to account for Table E.4 \u2013 Proposals for types of cost to be accounted for Table E.5 \u2013 Site constraints inventory <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | E.2.6 Step 05: Management assumptions Table E.6 \u2013 Impact of energy management assumptions on plant sizing <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | E.2.7 Step 06: Technical choices Table E.7 \u2013 Impact of cost management assumptions on plant sizing <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | E.2.8 Step 07: Calculations E.2.9 Step 08: Analysis of the results <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | E.2.10 Step 09: Examination of the opportunity of other choices E.2.11 Step 10: Change in technical choices E.2.12 Step 11: Definition of desired equipment characteristics E.2.13 Step 12: Identification of existing\/available equipment complying with the characteristics E.2.14 Step 13: New calculations E.2.15 Step 14: Analysis of the results E.2.16 Step 15: Examining the opportunity of other choices E.2.17 Step 16: New choices of equipment <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | E.2.18 Step 17: Technical characteristics for the finally chosen equipment E.2.19 Step 18: Forwarding the results to the project implementer E.2.20 Step 19: Modification of the input data <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Recommendations for renewable energy and hybrid systems for rural electrification – System selection and design<\/b><\/p>\n |