Cold-end system operation optimization method and device, computer equipment and storage medium

The invention relates to the technical field of energy conservation and consumption reduction of coal-fired units, and discloses a cold-end system operation optimization method and device, computer equipment and a storage medium. A first corresponding relation between the exhaust steam pressure and the electric power of the steam turbine and a second corresponding relation between the power and the frequency of a fan of the cold end system are determined in a fitting mode, and the environment temperature, the electric power of the steam turbine, the current frequency of the fan and multiple sets of preset frequency variations are combined; electric power increments of the steam turbines, power increments of the fans and net output increments of the multiple sets of steam turbines in one-to-one correspondence with the multiple sets of frequency variations are obtained through calculation; and determining two groups of net output increments with a symmetric relationship from the plurality of groups of net outpu