1、 IEC TS 61724-2 Edition 1.0 2016-10 TECHNICAL SPECIFICATION Photovoltaic system performance Part 2:Capacity evaluation method IEC TS 61724-2:2016-10(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publica
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10、ase contact the Customer Service Centre:csciec.ch.IEC TS 61724-2 Edition 1.0 2016-10 TECHNICAL SPECIFICATION Photovoltaic system performance Part 2:Capacity evaluation method INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 27.160 ISBN 978-2-83223-664-2 Registered trademark of the International Electro
11、technical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC TS 61724-2:2016 IEC 2016 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.8 4 Test scope,schedule and duration.10 5 Equipment and measurements.1
12、1 6 Procedure.12 6.1 Documentation of the performance targets under“unconstrained”and“constrained”operation.12 6.1.1 General.12 6.1.2 Definition of test boundary to align with intended system boundary.12 6.1.3 Definition of the reference conditions for“unconstrained”operation.12 6.1.4 Definition of
13、the performance target under“unconstrained”and“constrained”operation.13 6.1.5 Definition of the temperature dependence of the plant output under“unconstrained”operation.13 6.1.6 Definition of irradiance dependence.14 6.1.7 Definition of the performance target under“constrained”operation.14 6.1.8 Unc
14、ertainty definition.14 6.2 Measurement of data.14 6.2.1 General.14 6.2.2 Data checks for each data stream.15 6.2.3 Shading of irradiance sensor.16 6.2.4 Calibration accuracy.16 6.2.5 Using data from multiple sensors.16 6.2.6 Unconstrained operation and constrained operation when the output limit of
15、the inverter is reached.17 6.3 Calculation of correction factor.17 6.3.1 General.17 6.3.2 Measure inputs.17 6.3.3 Verify data quality.17 6.3.4 Calculate the correction factor for each measurement point.17 6.3.5 Correct measured power output.18 6.3.6 Average all values of corrected power.18 6.3.7 Ana
16、lyse discrepancies.18 6.4 Comparison of measured power with the performance target.18 6.5 Uncertainty analysis.19 7 Test procedure documentation.20 8 Test report.21 Annex A(informative)Example of model for module temperature calculations.22 A.1 General.22 A.2 Example heat transfer model to calculate expected cell operating temperature.22 Annex B(informative)Example of model for system power.25 B.1 General.25 IEC TS 61724-2:2016 IEC 2016 3 B.2 Example model.25 Annex C(informative)Inconsistent arr
