黄河流域九省区废弃矿井抽水蓄能利用潜力评估

Evaluation on potential of using abandoned mines for pumped storage in nine provinces of Yellow River Basin

  • 摘要: 针对我国关闭矿井资源利用率低、蓄电储能需求日益增长的问题,废弃矿井抽水蓄能技术是实现资源二次开发利用,提升电网调峰能力的有效手段。基于废弃矿井抽水蓄能电站工作原理与发展现状,提出在黄河流域九省区利用废弃矿井建设抽水蓄能电站的半地下式、全地下式2种模式。通过综合考虑空间、地质、水文、社会、经济与资源等影响因素,提出废弃矿井抽水蓄能电站选址评价指标体系,并进行黄河流域废弃矿井抽水蓄能电站实例分析。基于2016—2020年黄河流域九省区的废弃煤矿资料,利用废弃矿井抽水蓄能电站静态效益与动态效益计算方法,定量评估黄河流域九省区废弃煤矿抽水蓄能电站建设的开发潜力。结果表明:(1) 黄河流域九省区能源资源丰富,现阶段满足电力供应需求,但火电仍是电力供应主体且水电发展进入瓶颈阶段;(2) 影响废弃矿井抽水蓄能电站选址的重要因素为巷道空间体积、上下水库水位差、巷道围岩稳定性、巷道围岩渗透率与地下水循环特征;(3) 由黄河流域废弃矿井抽水蓄能电站实例分析可知,其发电效率可达到75.7%,可媲美常规抽水蓄能电站;(4) 2016—2020年黄河流域九省区废弃煤矿累计有效可利用井巷空间为4.7×107 m3,依据132座废弃矿井基本情况,从统计学角度估算出废弃矿井抽水蓄能电站可利用井巷空间为1.34×107 m3,利用其建设抽水蓄能电站年发电量可达3.78×109 kW·h,可满足2021年黄河流域九省区28.4%的弃风、弃光电量的消纳需求,每年直接经济效益约达21.2亿元。综上表明,黄河流域九省区废弃矿井抽水蓄能利用具有可观的发展前景。

     

    Abstract: In view of the low utilization rate of closed mine resources and the increasing demand for power and energy storage in China, the pumped storage technology of abandoned mine is an effective means to realize the secondary development and utilization of resources and enhance the peak sheaving capacity of power grid. Based on the working principle and development status of pumped storage power plants using the abandoned mines, it was proposed to build the semi-underground and full-underground pumped storage power plants using the abandoned mines in the nine provinces of Yellow River Basin. By considering the influence factors of space, geology, hydrology, society, economy and resources, an evaluation index system of site selection for pumped storage power plants using the abandoned mine was developed and an case analysis was performed for the pumped storage power plants using abandoned mine in Yellow River Basin. Besides, the development potential of pumped storage power plants using abandoned coal mines in the nine provinces of Yellow River Basin was quantitatively assessed based on the data of abandoned coal mines in the nine provinces of Yellow River Basin from 2016 to 2020 and the calculation methods of static and dynamic benefits of pumped storage power plants using the abandoned mines. The research shows that: (1) Rich energy resources are distributed in the nine provinces in Yellow River Basin and could meet the demand for electricity supply at present, but thermal power is still the main source of electricity supply while hydropower has entered the bottleneck stage of development. (2) The important influencing factors for the site selection of pumped storage power plant using abandoned mine are the special volume of drifts, the water level difference between the upper and lower reservoirs, the stability and permeability of the drift surrounding rocks and the characteristics of groundwater circulation. (3) According to the case analysis on the pumped storage power plant using abandoned mine in Yellow River Basin, it is found that its power generation efficiency could reach 75.7%, which is comparable to that of the conventional pumped storage power plant. (4) The cumulative special volume of shafts and drifts available in the abandoned coal mines in the nine provinces of Yellow River Basin from 2016 to 2020 is 4.7×107 m3. According to the basic information of 132 abandoned mines, it is further estimated from the statistical point of view that the available space of shafts and drifts for the pumped storage power plant in the abandoned mine is 1.34×107 m3, and it is calculated that the annual power generation of the pumped storage power plants using the abandoned mines would reach 3.78×109 kW·h, which could meet the consumption demand for 28.4% of the abandoned wind and photovoltaic power in the nine provinces of Yellow River Basin in 2021, with an annual direct economic benefit of about 2.12 billion yuan. To sum up, the utilization of abandoned mine for pumped storage power plant in the nine provinces of Yellow River Basin has huge prospects of development.

     

/

返回文章
返回