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基于煤矿排土场的光伏发电项目方案优化

Optimization of Photovoltaic Power Generation Project Based on Coal Mine Dump

  • 摘要:
      目的  通过“以光治荒”的方式推进煤矿排土场光伏发电项目的建设,将生态保护与绿色高效能源战略有机融合,以达到良好经济发展和生态环境治理的效果。
      方法  以某煤矿排土场光伏发电项目优化为例,原方案采用的全固定支架形式,考虑到红线调整、地质影响、施工进度可控等因素,现调整为固定支架+柔性支架组合方案,场地较平缓部分区域考虑布置固定支架,柔性支架主要设置在坡面与跨沟处,占比为40%~45%。结合固定倾角、发电效率、光伏组串布置间距等因素进行优化,方案一固定支架倾角按16°,柔性支架东西向固定倾角按4°,南向及偏南方向顺坡布置。方案二根据最佳倾角确定,固定支架倾角采用24°,柔性支架固定倾角采用19°。
      结果  方案一比方案二增加8 MWp左右;25 a总发电量:方案一比方案二增加10%~15%。发电系统总效率:方案一比方案二减少2%左右。
      结论  研究表明本方案的优化保证其装机容量、工程安全等的同时,煤矿排土场边坡布置柔性支架增加了本工程创新性,为后续相关工程起到示范作用。在工程设计优化过程中,不仅仅考虑效率因素,更多的是需关注多目标因素优化带来的经济效益。

     

    Abstract:
      Introduction  To promote the construction of photovoltaic power generation project in coal mine dump based on the concept of "desertification control with a PV project", and organically integrate ecological protection with green and efficient energy strategies to achieve the purpose of sound economic development and ecological environment governance.
      Method  The optimization of photovoltaic power generation project in a coal mine dump was taken as an example, in the original plan, a fully fixed support is used. After taking into account factors such as boundary line change, geological influence, and controllable construction progress, now a combination of fixed supports and flexible supports is adopted. In areas with relatively flat terrain, fixed supports are considered, and the flexible supports are mainly used for slopes and cross ditches (40%~45%) . Optimization is carried out based on factors such as fixed inclination angle, power generation efficiency, and spacing of PV strings. Option 1:The fixed support has an inclination angle of 16°, a flexible support fixed inclination angle of 4° in the east-west direction, and it is arranged on the slope in the south and slightly south directions. Option 2: the fixed support has an optimal inclination angle of 24° and a flexible support inclination angle of 19°.
      Result  The power generation in Option 1 is about 8 MWp higher than that of Option 2, and the total power generation is increased by 10%~15% in 25 years. The total efficiency of the power generation system in Option 1 reduces by about 2% compared to Option 2.
      Conclusion  The study has shown that the project optimization guarantees the installed capacity, safety, etc. At the same time, it's an innovation to arrange flexible supports on the slope of the coal mine dump in this project, so it serves as a model for future projects. In the process of project design optimization, we should not only consider the efficiency, but also pay more attention to the economic benefits brought by multi-objective factor optimization.

     

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