Optimal rotating speed control method for improving power generation performance of large wind turbine unit

The invention discloses an optimal rotating speed control method, device, and equipment for improving the power generation performance of a large wind turbine unit and a computer readable storage medium. The optimal rotating speed control method includes the steps that a generator output power P(n) and a generator rotating speed omega(n) of the nth control cycle, a generator output power P(n-1) and a generator rotating speed omega(n-1) of the n-1th control cycle are obtained; a variable quantity e of the generator output power and a variable quantity e of the generator rotating speed are calculated, and a generator rotating speed changing direction mark position a (please see the specifications for the formula) is obtained, wherein e = P(n) - P(n-1), e= omega(n) - omega(n-1), and m is a preset value greater than 0; according to a generator output power variable quantity e' and a generator rotating speed variable quantity e', a generator rotating speed variable amplitude Delta omega (please see the specificati