Wind power plant power distribution method and system for coordinating frequency modulation capability of wind turbine generator, computer equipment and storage medium

Abstract

The invention discloses a wind power plant power distribution method and system for coordinating the frequency modulation capability of a wind turbine generator, computer equipment and a storage medium, which belong to the field of wind power plant optimal scheduling. Aiming at the problem of partial unit instability and operation quitting caused by improper power instruction distribution in the frequency modulation participation process of a wind power plant, on the basis of a traditional distribution strategy, distribution weighting coefficients are optimized in combination with releasable kinetic energy of wind turbine generators in different wind speed intervals; and meanwhile, by collecting the rotating speed of each wind turbine generator in real time, the wind turbine generator withthe rotating speed lower than a stable operation limit value actively quits frequency modulation, and thus the caused frequency modulation power shortage is jointly borne by other wind turbine generators in normal operation. The difference of frequency modulation capabilities among different units can be fully considered in the distribution process, so that the stable operation of each wind turbine generator in the wind power plant can be ensured while the wind power plant meets the power grid dispatching requirement.

Description

technical field [0001] The invention belongs to the field of optimal dispatching of wind farms, and in particular relates to a wind farm power distribution method, system, computer equipment and storage medium for coordinating the frequency modulation capabilities of wind turbines. Background technique [0002] Due to the strong randomness and volatility of wind power, the impact of large-scale wind power access on the stable operation of the power system has become increasingly prominent. The decoupling of wind turbine speed and grid frequency reduces the total inertia of the system and weakens the frequency regulation capability. For this reason, it is necessary to require wind power to have the ability to regulate active power to relieve the pressure of power system frequency regulation. Due to the small capacity of wind power units and the limited support power they can provide, research often focuses more on power scheduling at the wind farm level. However, considerin...

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Problems solved by technology

However, in the short time scale in which wind farms participate in frequency regulation, there are inevitably some errors in the existing wind speed prediction technology

Therefore, it is difficult to accurately reflect the impact of short-term wind speed changes on the operating state of the unit when the above method is used for power command allocation.

[0004] Further studies have found that when the wind speed continues to decrease during the frequency regulation period, the speed of the unit decreases and its own kinetic energy decreases. If the wind farm is still allocated on the basis of the predicted average wind speed, the allocated power increase command may exceed the kinetic energy released by the unit itself. , which in turn causes the unit to lose stability and exit operation due to excessive kinetic energy release and the speed being lower than the minimum speed

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