Field-Aging Test Bed for Behind-the-Meter PV + Energy Storage

Deline, Chris; Sekulic, William; Jenket, Don; Jordan, Dirk; DiOrio, Nick; Smith, Kandler

doi:10.1109/pvsc40753.2019.8980775

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…The adoption of bifacial PV technology is facilitated by the electrical performance characterisation of bifacial PV devices [1]. In order to characterise the bifacial PV devices under Standard Test Conditions (STC; 1000 W m −2 total irradiance, AM1.5 G spectral irradiance and module temperature at 25 °C), an extension of the definition of STC, e.g., spectral and total irradiance on the rear side of the module and a regulation of irradiance on both sides of the bifacial PV devices are required [9,10]. In 2019, the technical specification IEC TS 60904-1-2 [11] was published to standardise the indoor and outdoor electrical characterisation of bifacial PV cells and modules.…”

Section: Introductionmentioning

confidence: 99%

Meeting the requirements of IEC TS 60904-1-2 for single light source bifacial photovoltaic characterisation: evaluation of different back panel materials

et al. 2020

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The International Electrotechnical Commission (IEC) published a technical specification, TS60904-1-2 in 2019 to standardize both indoor and outdoor characterisation ofbifacial PV cells and modules. The indoor electrical characterisation can be performed with a single or double light source. Given the linear relationship between irradiance and short-circuit current, the effect of stray light on the nonirradiated side could generate measurement artefacts in the single light source characterisation. Hence, the technical specification mentions several procedures to carefully control the unwanted irradiance below 3 W m −2 . This paper describes an approach for systematic analysis of the back panel materials through experiment and simulation to meet IEC TS 60904-1-2 requirements. First, optical properties (specular and diffuse reflection) of four different backpanel materials are evaluated. Next, using different back panel materials, the irradiance on the non-irradiated side of a bifacial module is spatially mapped out using low-noise response silicon photodiode. The average irradiance on the non-irradiated side for the existing solar simulator configuration is measured to be 5.7 W/m 2 , failing to meet the standard requirements. The low-reflection coating (LRC) material with mask achieves the lowest average irradiance of 0.9 W m −2 on the non-irradiated side and reduces the irradiance from existing configuration by 84 %. Lastly, ray-tracing simulation is used to plot the irradiance profile on the non-irradiated side, to compensate for the low-resolution irradiance map constructed using experimental measurements with the photodiode. The simulation results also show that when a flash chamber is long, similar to a black tunnel of rectangular tube, the back panel is not required to fulfil the requirements of technical specification for single light source characterisation.

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Section: Introductionmentioning

confidence: 99%