High-proportion renewable energy power system toughness optimization method based on underground energy storage

The invention discloses a high-proportion renewable energy power system toughness optimization method based on underground energy storage, and the method comprises the following steps: building a power system toughness evaluation model under an extreme weather condition according to the performance of a power system under a normal operation condition and the operation performance of the power system affected under an extreme event; establishing an underground energy storage operation and planning double-layer optimization model under the extreme weather according to the power system toughness evaluation model under the extreme weather condition; and converting the underground energy storage operation and planning double-layer optimization model in extreme weather into a single-layer model, converting the single-layer model into a mixed integer programming model through a linearization method, and solving to obtain an optimal scheme of underground energy storage system configuration and operation. The method c