The unique features of abandoned mines offer considerable potential for the construction of large-scale pumped storage power stations. Several countries have reported the conversion of abandoned mines to pumped storage plants, and a pilot project for the conversion of an underground reservoir group has been formalized in China.
Abandoned-mine pumped storage technology can help the peak shifting of the power grid and improve the operating stability and economy of the power grid, but the construction of the pumped storage power station is restricted by geographic conditions; that is, there must be a large enough drop between the upper and lower reservoirs.
The surface/underground space of the abandoned mine were converted into an energy storage reservoir, and a water delivery system was put in place to constitute a pumped storage system [ 24, 25 ].
In addition, it is necessary to ensure the stability of the underground space support of the abandoned mine, determine the failure mode and location of the roadway based on the mechanical model of fluid–structure interaction, and optimize the seepage prevention, support, and reinforcement technology.
The underground space resources of abandoned coal mines in China are quite abundant, and the research and development of underground space energy storage technology in coal mines have many benefits.
Based on international operating experience, the replenishment of abandoned-mine pumped storage power station usually uses mine water as the replenishment water source, and the storage time can be as long as one year or more.
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A new sort of large-scale energy storage plant is the abandoned mine gravity energy storage power station. It features a simple concept, a low technical threshold, good reliability, efficiency, and a huge capacity [27].The abandoned mine gravity energy storage power station lifts the weight through a specific transportation system to drive the generator set to …
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Construction of abandoned-mine pumped storage power stations will help to eliminate bottlenecks in energy storage links, seize the high-end links and key nodes of new energy and high-end equipment industry chain, and create a new energy–large-scale energy storage–smart power grid innovative industrial cluster. In addition, it promotes high ...
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Underground pumped storage plants in coal mines (UPSHCM) are a technology that uses abandoned or abandoned wells and goafs after coal mining as underground storage reservoirs, uses electricity to pump water to the upper reservoir during low power load, and then releases water to the lower reservoir at peak power load to produce electricity ...
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