Monitoring method and system of energy storage system of nuclear power station emergency power supply

The invention is applicable to the field of nuclear power control, and provides a monitoring method and a system of an energy storage system of a nuclear power station emergency power supply. The method comprises the following steps of: acquiring the performance parameters of a battery in the energy storage system; calculating the total capacity of the energy storage system according to the performance parameters of the battery; monitoring the working condition of a nuclear power station, and calculating the load capacity of the nuclear station in the current working condition according to the working condition of the nuclear power station; and determining the residual discharge time of the energy storage system at the current working condition and outputting the determined residual discharge time according to the total capacity of the energy storage system and the load capacity of the nuclear power station. The online monitoring system of the energy storage system which is provided in the embodiment of the i