Device and method for starting pumped storage group and pumped storage system

A device for starting a pumped storage group, comprising:

• an acquisition module configured to acquire starting data of the group in real time;
• a first determination module coupled to the acquisition module, and configured to determine a real-time speed versus time curve for the group based on the starting data;
• and
• a correction module coupled to the first determination module, and configured to correct a starting speed of the group based on a deviation between a reference speed versus time curve cluster and the real-time speed versus time curve;
• wherein the correction module includes a first sub-module and a second sub-module;
• wherein the first sub-module is coupled to the first determination module, and configured to determine a present reference speed versus time curve of the reference speed versus time curve cluster based on a load corresponding to the real-time speed versus time curve, and the present reference speed versus time curve and the real-time speed versus time curve are the same in load;
• the second sub-module is coupled to the first sub-module, and configured to correct the starting speed of the group based on the deviation between the real-time speed versus time curve and the present reference speed versus time curve, when a load of the group at a next starting is the same as a load of the group at present;
• the second sub-module includes a speed offset interval determination unit and a first correction unit;
• the speed offset interval determination unit is coupled to the first sub-module, and configured to determine a speed offset interval based on the real-time speed versus time curve and the present reference speed versus time curve;
• and
• the first correction unit is coupled to the speed offset interval determination unit, and configured to correct the starting speed of the group based on an average speed offset rate of the speed offset interval.