IEC 62862-3-1:2022

IEC 62862-3-1 ®
Edition 1.0 2022-01
INTERNATIONAL
STANDARD
Solar thermal electric plants –
Part 3-1: Systems and components – General requirements for the design of
parabolic-trough solar thermal power plants
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 19 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 62862-3-1 ®
Edition 1.0 2022-01
INTERNATIONAL
STANDARD
Solar thermal electric plants –

Part 3-1: Systems and components – General requirements for the design of

parabolic-trough solar thermal power plants

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-1069-7

– 2 – IEC 62862-3-1:2022 © IEC 2022
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General requirements . 9
5 Electric power system requirements . 9
5.1 General . 9
5.2 Grid-connection . 9
5.3 Relay protection and automatic safety devices . 10
5.4 Dispatching automation . 10
5.5 Electric power system communication . 10
5.6 Electric energy metering . 10
6 Solar resource assessment . 10
7 Site selection . 10
8 Overall planning . 11
8.1 General . 11
8.2 Off-site planning . 12
8.3 On-site planning . 12
9 Collector system . 13
9.1 General . 13
9.2 Collectors . 13
9.3 Driving and tracking system . 14
10 Heat transfer system . 15
10.1 General . 15
10.2 HTF storage and expansion system . 15
10.3 HTF ullage system . 16
10.4 HTF filling system . 16
10.5 HTF anti-freezing system . 17
11 Thermal energy storage system . 17
11.1 General . 17
11.2 Storage system of thermal storage medium . 17
11.3 Heat transfer system of thermal storage medium . 18
11.4 Additional components . 19
12 Steam generation system . 20
12.1 General . 20
12.2 Steam generation equipment . 20
13 Steam turbine system . 21
13.1 Steam turbine . 21
13.2 Live steam, reheat and bypass system . 21
13.3 Feedwater system and pump . 21
13.4 Deaerator and feedwater tank . 22
13.5 Condensate system and condensate pump . 22
13.6 Drain pumps of low pressure heater . 23
13.7 Steam turbine cooling system . 23
13.8 Auxiliary equipment cooling water system . 24

13.9 Condenser and auxiliary facilities . 25
13.10 Regenerative system . 25
14 Layout of solar field . 25
14.1 General layout of solar field . 25
14.2 Layout of collectors and HTF pipelines . 26
14.3 Wind and sand protection . 26
15 Layout of power block . 26
15.1 General . 26
15.2 Layout of heat transfer facilities . 28
15.3 Layout of thermal storage facilities . 29
15.4 Layout of steam generation facilities . 29
15.5 Layout of steam turbine hall and central control building . 29
15.6 Layout of auxiliary fuel facilities . 30
15.7 Maintenance facilities . 31
16 Electrical equipment and system . 31
16.1 Generator and main transformer . 31
16.2 Main wiring . 32
16.3 AC auxiliary power system . 32
16.4 High-voltage distribution devices . 32
16.5 DC system . 32
16.6 Electrical monitoring and control . 32
16.7 Relay protection and safety automation devices . 33
16.8 Lighting system . 33
16.9 Cable selection and cable laying . 33
16.10 Overvoltage protection and grounding system . 33
17 Water treatment system . 33
17.1 Water quality and pretreatment . 33
17.2 Water pre-desalination . 34
17.3 Demineralized water treatment . 34
17.4 Condensed water fine treatment . 34
17.5 Chemical dosing and water and steam sampling . 35
17.6 Cooling water treatment . 35
17.7 Collector cleaning water treatment . 35
17.8 Waste water treatment . 35
17.9 Chemical storage . 35
18 Instrumentation and control . 36
18.1 General . 36
18.2 Automation level . 36
18.3 Control mode and control room . 36
18.4 Measurement and instrumentation . 36
18.5 Alarming . 37
18.6 Thermal process protection . 38
18.7 On-off control . 39
18.8 Analogue control . 39
18.9 Control system . 39
18.10 Control power supply . 40
18.11 Instrument tube, cable and layout of local equipment . 41

– 4 – IEC 62862-3-1:2022 © IEC 2022
19 Auxiliary systems and ancillary facilities .
...