The energy storage power station is placed in the underground garage

Battery storage power stations are usually composed of batteries, power conversion systems (inverters), control systems and monitoring equipment. There are a variety of battery types used, including lithium-ion, lead-acid, flow cell batteries, and others, depending on factors such as energy density, cycle life, and cost.

The construction process of energy storage power stations involves multiple key stages, each of which requires careful planning and execution to ensure smooth implementation.

Deep underground energy storage is the use of deep underground spaces for large-scale energy storage, which is an important way to provide a stable supply of clean energy, enable a strategic petroleum reserve, and promote the peak shaving of natural gas.

Based on the analysis of the background, types and status, and the study of the key theoretical and technical problems of deep underground energy storage in China, we make the following conclusions: (1) The use of deep underground spaces for energy storage is an important direction for future energy reserve maintenance.

Similar to conventional hydro storage on the surface, underground pumped hydro storage has upper and lower water reservoirs, a machine cavern with electrical facilities as well as supply and dissipation lines to the electrical grid. In contrast to conventional pumped hydro storage the constructions are predominately located in the subsurface.

Additional shafts and drifts are necessary for service and transport. The active principle of pumped hydro storage is to use “surplus” electrical energy to pump water from a lower to an upper reservoir. In this way electrical energy is converted into Figure 1. Underground pumped hydro scheme potential energy.