IWA 33-3:2021
(Main)Technical guidelines for the development of small hydropower plants — Part 3: Design principles and requirements
Technical guidelines for the development of small hydropower plants — Part 3: Design principles and requirements
This document specifies the general principles and basic requirements of design for small hydropower (SHP) projects up to 30 MWe, mainly including hydrology, geology, energy calculations, project layout, hydraulics, electromechanical equipment selection, construction planning, project cost estimates, economic appraisal, social and environmental assessments. Application of this document is intended to be site specific, with the principles and requirements of design applied in accordance with the needs of proposed hydropower plant.
Lignes directrices techniques pour le développement de la petite hydraulique — Partie 3: Titre manque
General Information
Standards Content (Sample)
INTERNATIONAL IWA
WORKSHOP 33-3
AGREEMENT
First edition
2021-03
Technical guidelines for the
development of small hydropower
plants —
Part 3:
Design principles and requirements
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Hydrology . 1
4.1 Basic data . 1
4.2 Runoff (discharge) . 2
4.3 Flood . 3
4.4 Stage-discharge relation curve . 4
4.5 Sediment, evaporation, ice regime and others . 5
4.6 Rationality check of the outcomes . 5
5 Engineering geology . 6
5.1 General provisions . 6
5.2 Regional geology. 7
5.3 Engineering geology of the reservoir area . 7
5.4 Engineering geology of hydraulic structures . 8
5.5 Natural construction material .10
6 Hydraulic engineering and energy calculation .11
6.1 General provisions .11
6.2 Computation of runoff regulation . .11
6.3 Hydraulic energy calculation .12
6.4 Load forecast and electric power and energy balance .13
6.5 Selection of flood regulation and characteristic flood-control level .13
6.6 Selection of normal water level and dead storage water level .13
6.7 Selection of installed capacity and type of unit .14
6.8 Selection of dimensions of headrace and volume of daily regulation pool .14
6.9 Analysis of the reservoir sediment deposition and calculation of the backwater .14
6.10 Reservoir operation mode and operational characteristics .15
7 Engineering layout and hydraulic structure .15
7.1 General provisions .15
7.2 General engineering layout .16
7.3 Water retaining structure .18
7.4 Water release structure .20
7.5 Water diversion structure .23
7.6 Powerhouse structure .26
7.7 Engineering safety monitoring .31
7.8 Concrete strength and durability .32
8 Hydraulic machinery, fire protection, heating and ventilation .33
8.1 General requirements for selection of turbine and generator .33
8.2 Selection of turbine rated head.34
8.3 Selection of turbine type .35
8.4 Selection of basic parameters of the reaction turbine .36
8.5 Selection of basic parameters of the impulse turbine .38
8.6 Unit transient performance analysis .39
8.7 Turbine governing system .40
8.8 Turbine main inlet valve .40
8.9 Cooling water and drainage system .41
8.10 Oil system .42
8.11 Compressed air system .42
8.12 Hydraulic monitoring system .43
8.13 Selection of lifting equipment .43
8.14 Fire protection .44
8.15 Heating and ventilation .44
8.16 Repair and maintenance equipment .45
8.17 Arrangement of hydraulic machinery equipment .45
9 Electrical system .46
9.1 Connection of the hydropower plant to the power system .46
9.2 Main electrical connection wiring .46
9.3 Selection of the main transformer .48
9.4 Selection of high-voltage electrical equipment .49
9.5 Overvoltage protection and earthing system .54
9.6 Lighting system.55
9.7 Layout of main electrical equipment inside and outside the power plant .55
9.8 Relaying protection and security automatic equipment .55
9.9 Excitation system .57
9.10 Automatic monitoring system .57
9.11 Plant service power supply and dam area power supply .58
9.12 DC operating power supply.58
9.13 Video monitoring system .58
9.14 Communication .58
10 Hydro mechanical structure .59
10.1 General provisions .59
10.2 Arrangement of hydro mechanical structure .59
10.3 Hoist selection for gates .61
10.4 Gate structure design .61
10.5 Anti-corrosion of hydro mechanical structures .61
11 Guidelines f
...
INTERNATIONAL IWA
WORKSHOP 33-3
AGREEMENT
First edition
2021-03
Technical guidelines for the
development of small hydropower
plants —
Part 3:
Design principles and requirements
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Hydrology . 1
4.1 Basic data . 1
4.2 Runoff (discharge) . 2
4.3 Flood . 3
4.4 Stage-discharge relation curve . 4
4.5 Sediment, evaporation, ice regime and others . 5
4.6 Rationality check of the outcomes . 5
5 Engineering geology . 6
5.1 General provisions . 6
5.2 Regional geology. 7
5.3 Engineering geology of the reservoir area . 7
5.4 Engineering geology of hydraulic structures . 8
5.5 Natural construction material .10
6 Hydraulic engineering and energy calculation .11
6.1 General provisions .11
6.2 Computation of runoff regulation . .11
6.3 Hydraulic energy calculation .12
6.4 Load forecast and electric power and energy balance .13
6.5 Selection of flood regulation and characteristic flood-control level .13
6.6 Selection of normal water level and dead storage water level .13
6.7 Selection of installed capacity and type of unit .14
6.8 Selection of dimensions of headrace and volume of daily regulation pool .14
6.9 Analysis of the reservoir sediment deposition and calculation of the backwater .14
6.10 Reservoir operation mode and operational characteristics .15
7 Engineering layout and hydraulic structure .15
7.1 General provisions .15
7.2 General engineering layout .16
7.3 Water retaining structure .18
7.4 Water release structure .20
7.5 Water diversion structure .23
7.6 Powerhouse structure .26
7.7 Engineering safety monitoring .31
7.8 Concrete strength and durability .32
8 Hydraulic machinery, fire protection, heating and ventilation .33
8.1 General requirements for selection of turbine and generator .33
8.2 Selection of turbine rated head.34
8.3 Selection of turbine type .35
8.4 Selection of basic parameters of the reaction turbine .36
8.5 Selection of basic parameters of the impulse turbine .38
8.6 Unit transient performance analysis .39
8.7 Turbine governing system .40
8.8 Turbine main inlet valve .40
8.9 Cooling water and drainage system .41
8.10 Oil system .42
8.11 Compressed air system .42
8.12 Hydraulic monitoring system .43
8.13 Selection of lifting equipment .43
8.14 Fire protection .44
8.15 Heating and ventilation .44
8.16 Repair and maintenance equipment .45
8.17 Arrangement of hydraulic machinery equipment .45
9 Electrical system .46
9.1 Connection of the hydropower plant to the power system .46
9.2 Main electrical connection wiring .46
9.3 Selection of the main transformer .48
9.4 Selection of high-voltage electrical equipment .49
9.5 Overvoltage protection and earthing system .54
9.6 Lighting system.55
9.7 Layout of main electrical equipment inside and outside the power plant .55
9.8 Relaying protection and security automatic equipment .55
9.9 Excitation system .57
9.10 Automatic monitoring system .57
9.11 Plant service power supply and dam area power supply .58
9.12 DC operating power supply.58
9.13 Video monitoring system .58
9.14 Communication .58
10 Hydro mechanical structure .59
10.1 General provisions .59
10.2 Arrangement of hydro mechanical structure .59
10.3 Hoist selection for gates .61
10.4 Gate structure design .61
10.5 Anti-corrosion of hydro mechanical structures .61
11 Guidelines f
...
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