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City-scale solar PV potential estimation on 3D buildings using multi-source RS data: A case study in Wuhan, China

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  • Chen, Zhe
  • Yang, Bisheng
  • Zhu, Rui
  • Dong, Zhen

Abstract

Assessing the solar photovoltaic (PV) potential on buildings is essential for environmental protection and sustainable development. However, currently, the high costs of data acquisition and labor required to obtain 3D building models limit the scalability of such estimations extending to a large scale. To overcome the limitations, this study proposes a method of using freely available multi-source Remote Sensing (RS) data to estimate the solar PV potential on buildings at the city scale without any labeling. Firstly, Unsupervised Domain Adaptation (UDA) is introduced to transfer the building extraction knowledge learned by Deep Semantic Segmentation Networks (DSSN) from public datasets to available satellite images in a label-free manner. In addition, the coarse-grained land cover product is utilized to provide prior knowledge for reducing negative transfer. Secondly, the building heights are derived from the global open Digital Surface Model (DSM) using morphological operations. The building information obtained from the above two aspects supports the subsequent estimation. In the case study of Wuhan, China, the solar PV potential on all buildings throughout the city is estimated without any data acquisition cost or human labeling cost through the proposed method. In 2021, the estimated solar irradiation received by buildings in Wuhan is 289737.58 GWh. Taking into account the current technical conditions, the corresponding solar PV potential is 43460.64 GWh, which can meet the electricity demands of residents. The code and test data for building information extraction are available at https://github.com/WHU-USI3DV/3DBIE-SolarPV.

Suggested Citation

  • Chen, Zhe & Yang, Bisheng & Zhu, Rui & Dong, Zhen, 2024. "City-scale solar PV potential estimation on 3D buildings using multi-source RS data: A case study in Wuhan, China," Applied Energy, Elsevier, vol. 359(C).
    • Handle: RePEc:eee:appene:v:359:y:2024:i:c:s030626192400103x
    DOI: 10.1016/j.apenergy.2024.122720
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    References listed on IDEAS

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