+AMD1:2026 CSV 光伏器件 第 1-2 部分：双面光伏（PV）器件的电流 - 电压特性测量

[中文适用范围]： IEC TS 60904-1-2:2024+AMD1:2026 CSV 文件描述了在自然光或模拟日光下测量双面光伏单结器件电流 - 电压（I-V）特性的程序。该标准适用于封装后的太阳能电池、此类电池的组件或完整的光伏（PV）组件。对于未封装太阳能电池的 I-V 特性测量，应适用 IEC TS 63202-3 标准。关于标准（单面）光伏器件 I-V 特性测量的要求，由 IEC 60904-1 标准涵盖；而本文件则专门描述双面光伏器件 I-V 特性测量的额外要求。本第二版替代并作废了 2019 年发布的第一版。与前一版相比，本版本包含以下重要技术变更：a) 适用范围已更新，对于未封装太阳能电池的 I-V 特性测量，现引用 IEC TS 63202-3 标准；b) 辐照度非均匀性的要求已更新，现引用 IEC 60904-9 标准中引入的分类；c) 关于非辐照背景的要求已修订；d) 光谱失配修正不再作为强制性要求，除非其他标准另有规定；但在计算测量不确定度时，仍需考虑光谱失配因素；e) 关于双面性的计算要求已修改：双面性等效辐照度不应基于 ISC（短路电流）与 Pmax（最大功率点）之间的最小双面性值进行计算，而应基于 ISC的双面性进行计算。 [外文原描述]： IEC TS 60904-1-2:2024+AMD1:2026 CSV 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.