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Assessing the Photovoltaic Power Generation Potential of Highway Slopes

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  • Zhenqiang Han

    (School of Highway, Chang’an University, Xi’an 710064, China
    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China)

  • Weidong Zhou

    (School of Highway, Chang’an University, Xi’an 710064, China)

  • Aimin Sha

    (School of Highway, Chang’an University, Xi’an 710064, China
    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China)

  • Liqun Hu

    (School of Highway, Chang’an University, Xi’an 710064, China
    Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China)

  • Runjie Wei

    (School of Highway, Chang’an University, Xi’an 710064, China)

Abstract

The solar photovoltaic (PV) power generation system (PGS) is a viable alternative to fossil fuels for the provision of power for infrastructure and vehicles, reducing greenhouse gas emissions and enhancing the sustainability of road transport systems. A highway slope is generally an idle public area with high accessibility, which is the ideal application scenario for a PV PGS. The assessment of PV power generation potential (PGP) is key for the planning and design of PV PGS projects. Previous approaches to potential assessments are mainly based on digital maps and image processing techniques, which do not fully consider the impacts of the highway orientation, the slope geometric characteristics, and the PV panel placement scheme on the evaluation results. Therefore, this study proposes an assessment method for the PV PGP on highway slopes using the design or calculated highway and slope geometric parameters and the solar radiation received by PV panels under the desirable placement scheme. Highway segmentation and geometric parameter calculation methods were established, and the optimal PV array placement schemes for typical slope orientations were determined by simulating the PV power generation in the software PVsyst (version 7.2). Afterwards, the theoretical PGP could be calculated using the received solar radiation and the available slope area. By subtracting the energy loss caused by temperature changes, the operation of inverters, and the PV modules’ performance decay, the actual PV PGP could be obtained. Finally, a case study of the solar PGP assessment of a 1.97 km long highway section is provided, and the feasibility of the proposed method is verified.

Suggested Citation

  • Zhenqiang Han & Weidong Zhou & Aimin Sha & Liqun Hu & Runjie Wei, 2023. "Assessing the Photovoltaic Power Generation Potential of Highway Slopes," Sustainability, MDPI, vol. 15(16), pages 1-26, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:16:p:12159-:d:1213400
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    References listed on IDEAS

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