1、 IEC TS 62446-3 Edition 1.0 2017-06 TECHNICA L SPECIFICA TION Photov oltaic(PV)systems Requirements for testing,documentation and maintenance Part 3:Photov oltaic modules and plants Outdoor infrared thermography IEC TS 62446-3:2017-06(en)colourinside THIS PUBLICA TION IS COPYRIGHT PROTECTED Copyrigh
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11、 testing,documentation and maintenance Part 3:Photov oltaic modules and plants Outdoor infrared thermography INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 27.160 ISBN 978-2-8322-4290-2 R egist er ed tr ademar k of t he Int er national Electr ot echnical Commission W arning!Make sure that y ou obtain
12、ed this publication from an authorized distributor.colourinside 2 IEC TS 62446-3:2017 IEC 2017 CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 Terms and definitions.7 4 Requirements of inspection equipment.9 4.1 General.9 4.2 Minimum requirements for IR-cameras used for inspecting PV plants
13、.9 4.3 Requirements for photo cameras for documentation of the findings.10 4.4 Requirements for equipment to record the ambient conditions.10 5 Inspection procedure.11 5.1 General.11 5.2 Visual inspection.12 5.3 Environmental conditions.12 5.4 Imaging procedure.13 5.4.1 General.13 5.4.2 Using fast c
14、arriers for IR-camera,e.g.aerial drones.13 5.4.3 Emissivity.14 6 Software for evaluation.15 7 Evaluation.15 7.1 General.15 7.2 Evaluation of IR images.16 7.3 Thermal abnormalities.17 7.3.1 General.17 7.3.2 Classes of abnormalities(CoA).17 7.3.3 Abnormalities of PV modules.17 7.3.4 Abnormalities of o
15、ther BOS components.17 7.4 Projection of temperature differences to nominal irradiance.18 7.4.1 General.18 7.4.2 Modules.20 7.4.3 Other BOS components.21 8 Inspection report.21 (normative)Inspection procedure explanations.24 Annex AA.1 Geometric resolution of the camera.24 A.2 Angle of view.24 A.3 M
16、atrix for cell identification.25 (normative)Qualification of personnel.27 Annex B(normative)Matrix for thermal abnormalities of PV modules.28 Annex C(informative)Polygon measurement as a method of evaluation.32 Annex D(informative)Beaufort scale.34 Annex EBibliography.36 Figure 1 Impact of camera moving speed.14 Figure 2 Dependence of the emissivity of glass on the angle of view 10.15 Figure 3 Examples of influence of wind(left)and cloud movement(right)on observed temperature pattern.16 IEC TS 6
