Method and system for primary frequency modulation of wind power

Abstract

The invention provides a method and system for primary frequency regulation of wind power, comprising: determining the theoretically producible active power of the wind turbine, and sorting the wind turbines according to the value of the theoretically generating active power; Set the standby capacity and load shedding rate of the fans; when the sum of the cumulatively set standby capacity of the fans reaches 0.06 times the sum of the rated power of all fans, set the load shedding rate of the remaining fans in the sequence to 0, with Reduce the load shedding rate of the wind turbine; when the frequency of the wind turbine drops and changes beyond the dead zone, and the primary frequency modulation command of the wind power indicates that the wind turbine needs to generate additional active power, the standby capacity will be input in sequence according to the sequence described above, until the input backup capacity meets the additional output indicated by the primary frequency modulation. Active power demand. The invention fully exploits the over-generating capacity of the fan, realizes the reduction of the reserved active power output of the fan during the non-primary frequency modulation period, improves the economic benefit, and reduces the loss of the mechanical part of the fan.

Description

technical field [0001] The invention belongs to the field of wind power frequency regulation, and more particularly, relates to a method and system for primary frequency regulation of wind power. Background technique [0002] With the substantial increase in the penetration rate of wind power in the power grid, large-scale wind farms will be connected to the grid and put into operation. Most of the existing wind farms do not have the primary frequency regulation capability, which further weakens the primary frequency regulation capability of the power grid when replacing conventional hydrothermal power units. While putting a huge pressure on the frequency regulation of the power grid, it seriously threatens the safe operation of the power grid, and the frequency regulation characteristics of the system under the fault disturbance gradually deteriorate. Therefore, it is very important for wind farms to have primary frequency regulation capability. [0003] In the existing pr...

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Problems solved by technology

[0005] In view of the defects of the prior art, the purpose of the present invention is to provide a wind power primary frequency regulation method and system, aiming to solve the problems of the existing wind power primary frequency regulation method such as wind abandonment, poor economy and mechanical loss caused by large pitch angle action angle

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