High-slope energy storage device and energy storage method based on high-slope locomotive

The invention relates to a high-slope energy storage device based on a high-slope locomotive, which comprises the locomotive, high-slope rails and a controller. The locomotive operates on the high-slope rails; a communication signal end of the locomotive is connected with an output signal end of the controller; a power supply end of the locomotive is connected with a power grid line; and an input signal end of the controller is connected with a scheduling communication output signal end of a power grid. The invention further discloses an energy storage method. The locomotive is configured on the uphill rails and is connected with the power grid line; in a case of off-peak power consumption or low electricity price, the locomotive is pushed to a mountain by electric energy; in a case of on-peak power consumption or insufficient power supply, the locomotive is released to go downhill, and generated electric energy is fed to the power grid; and when the power grid is difficult in frequency modulation, according