IEC TS 63265:2022
(Main)Photovoltaic power systems - Reliability practices for operation
Photovoltaic power systems - Reliability practices for operation
IEC TS 63265:2022 outlines methods that can be utilized to ensure reliability throughout the PVPS project phases. It is derived from a management motivation for long lasting and cost-effective energy performance, energy production, secure production and revenue, and safe function. The application of reliability practices in this document is designed to be practical and reduce the costs of unreliability. This document further identifies and defines a normative minimum set of processes and tools to meet the requirements of this document.
Key objectives of this document are to inform users of reliability tools and assessment methods (historic, predictive, and analytical) that can satisfy the stakeholders needs for dependable PV Power System (PVPS) operation. This document provides a fundamental process for ensuring reliability needs can be understood and met. IEC TS 63019 addresses availability which is a higher-level metric that combines reliability and maintainability, and it complements this document as a key normative standard. It should be used in combination with this document.
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IEC TS 63265 ®
Edition 1.0 2022-06
TECHNICAL
SPECIFICATION
colour
inside
Photovoltaic power systems – Reliability practices for operation
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IEC TS 63265 ®
Edition 1.0 2022-06
TECHNICAL
SPECIFICATION
colour
inside
Photovoltaic power systems – Reliability practices for operation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-3877-6
– 2 – IEC TS 63265:2022 © IEC 2022
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 11
4 Interrelationship of reliability, availability and maintainability . 11
4.1 General . 11
4.2 Information model . 11
4.3 Link to IEC TS 63019 . 13
4.4 Benefits and justification for a robust reliability program . 14
5 Development phase of a PVPS project . 14
5.1 General . 14
5.2 Initial reliability program plan, design for reliability . 14
5.3 Critical items list . 16
5.4 Preliminary failure modes and effects and criticality analysis and other fault
analyses . 17
5.5 High level reliability model . 18
6 EPC phase of a PVPS project . 21
6.1 General . 21
6.2 EPC reliability program plan . 21
6.3 Update FMECA, FMEA, FTA, and risk minimization approaches . 22
6.4 Detailed reliability model and Monte Carlo modelling . 22
6.5 Designed and specified FRACAS . 23
6.6 Preliminary O&M plan . 24
6.7 PVPS design and specification . 24
6.8 Documentation and stakeholder guidance . 25
7 O&M phase of a PVPS project . 25
7.1 General . 25
7.2 O&M plan for reliability . 25
7.3 Failure identification . 27
7.4 Failure database . 30
7.5 Root cause analysis . 30
7.6 Repair/replacement database . 31
7.7 Pareto sorting and weak links identified . 32
7.8 Reliability assessment . 32
7.9 Life cycle costs (LCC) of reliability . 33
Bibliography . 34
Figure 1 – Clipping time decline . 14
Figure 2 – Example high level reliability block diagram . 20
Table 1 – Information category overview for a PVPS . 12
Table 2 – Failure incident data tracking . 27
Table 3 – Model report content . 29
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC POWER SYSTEMS –
RELIABILITY PRACTICES FOR OPERATION
FOREWORD
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IEC TS 63265 has been prepared by IEC technical committee 82: Solar photovoltaic energy
systems. It is a Technical Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
82/1993/DTS 82/2039/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
– 4 – IEC TS 63265:2022 © IEC 2022
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specific document. At this date, the document will be
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• replaced by a revised edition, or
• amended.
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INTRODUCTION
Key objectives of this document are to inform users of reliability tools and assessment methods
(historic, predictive, and analytical) that can satisfy the stakeholders needs for dependable PV
Power System (PVPS) operation. Stakeholders will be able to use this information as a common
basis for reliability assessments, effective operation and maintenance (O&M) planning and
execution, reporting, communication of field data, and reliability metrics. Reliability feedback to
stakeholders is an objective to be further defined by the stakeholders themselves as individual
stakeholders will have differing needs for data and reporting. This document provides a
fundamental process for ensuring reliability needs can be understood and met. IEC TS 63019
addresses availability which is a higher-level metric that combines reliability and maintainability,
and it complements this document as a key normative standard. It should be used in
combination with this document.
Many of these tools and methods can be used to consider design alternatives or to support
design validation during the project phases. The ability to target critical components and
discrete O&M actions will have demonstrated value in practice. The characterisation of
components lifetimes is derived from real-time capability assessments, and historica
...
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