IEC 62862-4-1:2022

IEC 62862-4-1 ®
Edition 1.0 2022-09
INTERNATIONAL
STANDARD
Solar thermal electric plants –
Part 4-1: General requirements for the design of solar power tower plants

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IEC 62862-4-1 ®
Edition 1.0 2022-09
INTERNATIONAL
STANDARD
Solar thermal electric plants –

Part 4-1: General requirements for the design of solar power tower plants

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-5651-0

– 2 – IEC 62862-4-1:2022  IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 8
4 Basic requirements . 9
5 Electric power system requirements . 10
5.1 General requirements . 10
5.2 Requirements for grid-connection . 10
5.3 Relay protection and automatic safety device . 10
5.4 Dispatching automation . 10
5.5 Electric power system communication . 11
5.6 Electric energy metering . 11
6 Solar resource assessment. 11
7 Site selection . 11
8 Overall planning . 12
8.1 General requirements . 12
8.2 Off-site planning . 12
8.3 On-site planning. 13
9 Layout of heliostat field and receiver tower . 14
9.1 General requirements . 14
9.2 Layout of heliostat field . 14
9.3 Layout of receiver tower . 14
9.4 Safety protection facilities . 15
9.5 Maintenance and inspection facilities . 15
10 Layout of power block . 15
10.1 General requirements . 15
10.2 Layout of thermal energy storage area . 16
10.3 Layout of steam generation system area . 16
10.4 Layout of steam turbine house . 17
10.5 Layout of auxiliary heating area . 17
10.6 Maintenance facilities . 17
11 Collector system . 17
11.1 General requirements . 17
11.2 Heliostats . 17
11.3 Receiver . 18
11.4 Heliostat cleaning . 19
12 Heat transfer, thermal energy storage and steam generation system . 19
12.1 General requirements . 19
12.2 Heat transfer system . 20
12.3 Thermal energy storage system . 20
12.4 Steam generation system . 21
12.5 Auxiliary system . 21
13 Steam turbine system . 22
14 Water treatment system . 22
14.1 Water quality and pretreatment . 22

14.2 Water pre-desalination . 22
14.3 Demineralized water treatment system . 22
14.4 Heliostat cleaning water treatment . 22
14.5 Wastewater treatment . 23
15 Information system . 23
15.1 Security and protection system . 23
15.2 Video monitoring system for production . 23
15.3 Information system cabling . 23
15.4 Information security . 23
16 Instrumentation and control . 23
16.1 Automation level . 23
16.2 Control mode and control room . 23
16.3 Measurements and instrumentation . 24
16.4 Alarms . 24
16.5 Protection . 24
16.6 Analogue control . 25
16.7 Control system . 25
16.8 Power supply to control system . 26
17 Electrical equipment and system . 26
17.1 Generator and main transformer . 26
17.2 AC auxiliary power system . 26
17.3 DC system and AC uninterruptible power supply . 26
17.4 High-voltage electrical switchgear . 27
17.5 Electric monitoring and control . 27
17.6 Elements relay protection. 27
17.7 Lighting system . 27
17.8 Grounding system . 27
17.9 Other facilities . 27
18 Occupational safety and occupational health . 27
Annex A (informative) Electricity output estimation . 28
Bibliography . 30

– 4 – IEC 62862-4-1:2022  IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SOLAR THERMAL ELECTRIC PLANTS –

Part 4-1: General requirements for the design of solar power tower plants

FOREWORD
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