Benchmarking of solar irradiance nowcast performance derived from all-sky imagers

SA Logothetis, V Salamalikis, S Wilbert, J Remund… - Renewable Energy, 2022 - Elsevier
Fluctuations of the incoming solar irradiance impact the power generation from photovoltaic
and concentrating solar thermal power plants. Accurate solar nowcasting becomes …

Validation of an all‐sky imager–based nowcasting system for industrial PV plants

P Kuhn, B Nouri, S Wilbert, C Prahl… - Progress in …, 2018 - Wiley Online Library
Because of the cloud‐induced variability of the solar resource, the growing contributions of
photovoltaic plants to the overall power generation challenges the stability of electricity …

Mismatching and partial shading identification in photovoltaic arrays by an artificial neural network ensemble

M Piliougine, G Spagnuolo - Solar Energy, 2022 - Elsevier
Photovoltaic arrays may suffer from a number of temporary and permanent faults. Partial
shading and soiling belong to the former group, while cell cracking and delamination fall …

Cloud height and tracking accuracy of three all sky imager systems for individual clouds

B Nouri, P Kuhn, S Wilbert, N Hanrieder, C Prahl… - Solar Energy, 2019 - Elsevier
Solar irradiance nowcasts can be derived with sky images from all sky imagers (ASI) by
detecting and analyzing transient clouds, which are the main contributor of intra-hour solar …

[HTML][HTML] Model-based analysis of shading losses in ground-mounted photovoltaic power plants

N Varga, MJ Mayer - Solar energy, 2021 - Elsevier
Ground-mounted PV plants with multiple parallel mounting structure rows became the most
common type of PV systems, where the shading of the adjacent rows results in significant …

Validation of a closed-loop aim point management system at the Jülich solar tower

L Oberkirsch, D Zanger, B Hoffschmidt - Solar Energy, 2023 - Elsevier
Due to modeling errors and disturbances caused by clouds, Solar Power Tower (SPT) plants
consider high safety margins during operation leading to a significant loss of revenues. This …

GPU-based aim point optimization for solar tower power plants

L Oberkirsch, DM Quinto, P Schwarzbözl… - Solar Energy, 2021 - Elsevier
In solar tower power plants, aim point optimization is suitable to find aim point distributions
resulting in intercept powers close to the theoretical maximum. However, the application in …

Static optimal control: Real-time optimization within closed-loop aim point control for solar power towers

L Oberkirsch, DAV Zanger, DM Quinto, P Schwarzbözl… - Solar Energy, 2023 - Elsevier
Many aim point optimization techniques exist to control Solar Power Towers (SPTs).
However, SPTs exhibit optical losses that cannot be exactly modeled. Moreover, cloud …

Benchmarking three low-cost, low-maintenance cloud height measurement systems and ECMWF cloud heights against a ceilometer

P Kuhn, M Wirtz, N Killius, S Wilbert, JL Bosch… - Solar Energy, 2018 - Elsevier
Cloud height information is crucial for various applications. This includes solar nowcasting
systems. Multiple methods to obtain the altitudes of clouds are available. In this paper, cloud …

Cloud motion estimation from small-scale irradiance sensor networks: General analysis and proposal of a new method

MJ Espinosa-Gavira, A Agüera-Pérez… - Solar Energy, 2020 - Elsevier
Small-scale PV generation is particularly affected by the irradiance variability produced by
cloud shadows. Accurate predictions of the clouds passing over the PV field are thus …