Wind turbine group cooperative control method and device with wind power plant participating in frequency modulation

Abstract

The invention discloses a wind turbine group cooperative control method and device for a wind power plant participating in frequency modulation. The wind turbine group cooperative control method comprises the steps of: acquiring a maximum additional active power sequence obtained after wind turbine generators are arranged from small to large according to the power, and taking the maximum additional active power sequence as a frequency modulation priority sequence; acquiring power vacancy information and thermal power generating unit additional active power participating in frequency modulation, and performing distribution of wind turbine additional active power reference values according to the frequency modulation priority sequence to obtain a distribution result; and when the thermal power generating unit starts primary frequency modulation, controlling the wind power generating unit to start to quit frequency modulation step by step according to the distribution result and a preset time interval, and the proportion of the added active power of the wind power generator in the total added power of the wind power plant in each quit process is the same. According to the wind turbine group cooperative control method for the wind power plant to participate in the frequency modulation, the effect of assisting the thermal power generating unit to participate in the frequency modulation by wind power can be optimized, the secondary impact when the wind turbine unit quits the frequency modulation is reduced, and the efficiency and stability of the process are improved.

Description

technical field [0001] The invention relates to the technical field of renewable energy, in particular to a method and device for coordinated control of a wind turbine group in which a wind farm participates in frequency modulation. Background technique [0002] With the integration of large-scale wind power into the grid, conventional synchronous generators with frequency modulation capability but a reduced proportion, and wind turbines without frequency response capability but with increasing installed capacity will significantly reduce the frequency regulation capability of the power system. In order to ensure the stable operation of the power system, the wind farm should have the ability to participate in system frequency regulation, reasonably allocate the power shortage after the frequency of the system occurs, give full play to the frequency regulation capability of each unit, and share the frequency regulation task of the system with traditional power plants. Traditio...

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Problems solved by technology

[0003] Among them, for a wind farm composed of dozens of single-machine wind turbines, the frequency regulation capabilities of each single-machine wind turbine will vary due to the different wind speed zones and operating states.

However, in the prior art, frequency modulation methods such as inertial control, droop control, and overspeed method are usually used for frequency modulation control. Shock, affecting the stability of wind turbines

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