光伏装置 第1-2部分：双面光伏 (PV) 装置的电流 电压特性测量

[中文适用范围]： 本部分IEC 60904描述了在自然或模拟阳光下测量单结双面光伏器件电流-电压（I-V）特性的程序。适用于封装太阳能电池、此类电池的子组件或整个光伏组件。非封装太阳能电池的I-V特性测量适用IEC TS 63202-3。标准（单面）光伏器件I-V特性测量的要求由IEC 60904-1涵盖，而本文件描述了双面光伏器件I-V特性测量的附加要求。本文件可适用于设计用于在集中辐照下使用的光伏器件，前提是它们在测量时不使用聚光光学器件，并使用直接法向辐照度进行辐照，并对直接法向参考光谱进行失配校正。 [外文原描述]： IEC TS 60904-1-2:2024 describes procedures for the measurement of the current-voltage (I-V) characteristics of single junction bifacial photovoltaic devices in natural or simulated sunlight. It is applicable to encapsulated solar cells, sub-assemblies of such cells or entire PV modules. For measurements of I-V characteristics of non-encapsulated solar cells, IEC TS 63202-3 applies. The requirements for measurement of I-V characteristics of standard (monofacial) PV devices are covered by IEC 60904-1, whereas this document describes the additional requirements for the measurement of I-V characteristics of bifacial PV devices. This second edition cancels and replaces the first edition published in 2019. This edition includes the following significant technical changes with respect to the previous edition: a) The scope has been updated and refers to IEC TS 63202-3 for the measurement of non‑encapsulated solar cells. b) The requirements for the non-uniformity of irradiance have been updated and now refer to classifications introduced in IEC 60904-9. c) The requirement for non-irradiated background has been revised. d) Spectral mismatch corrections are no longer mandatory, unless required by another standard. Spectral mismatch would have to be considered in the measurement uncertainty. e) The requirement regarding the calculation of bifaciality has been modified: Equivalent irradiance shall not be calculated based on the minimum bifaciality value between ISC and Pmax, but on the bifaciality of ISC.