A control method for controlling participation of energy storage in wind power frequency modulation based on rules

Abstract

The invention discloses a control method for controlling participation of energy storage in wind power frequency modulation based on rules. The method based on rules quantitatively gives output powerrequired by wind power generator set rotor control, pitch control and energy storage control when frequency of an electric power system changes, cooperatively controls wind power generator set rotor speed, pitch angle and energy storage charge-discharge power, compensates for the defects of existing simple qualitative description of power distribution between a wind power plant and energy storageby utilizing technical and economic complementarity of rotor control, pitch control and energy storage control, and improves and perfects frequency response capability of the wind power plant with high technical economy to realize capability of the wind power plant in participation in system frequency modulation under full wind conditions, thereby improving frequency stability of the electric power system under high wind power and high permeability, reducing energy storage capacity requirements, reducing wind abandoning rate of the wind power plant, increasing auxiliary frequency modulation service value, reducing set wearing, prolonging service life of the set and improving overall operation economic benefits of the wind power plant.

Description

technical field [0001] The invention relates to a rule-based control method for energy storage participating in wind power frequency regulation. Background technique [0002] Wind power has developed rapidly both at home and abroad because of its mature technology, low cost and the advantages of large-scale development. As one of the main power sources in the future, wind power is increasingly considered to need to undertake auxiliary functions similar to conventional power sources, and be able to actively respond to changes in system frequency, including inertial response and primary frequency modulation. [0003] At present, some countries or regions with rapid wind power development have begun to formulate and gradually improve relevant technical regulations. For example, the Spanish power grid stipulates that wind power must provide 1.5% of rated power reserve capacity; There is a 2% primary reserve; Canada's Quebec Province stipulates that wind farms should provide 5% ...

AI Technical Summary

Problems solved by technology

[0005] Through the control of the rotor and pitch angle of the variable speed wind turbine, the wind farm can have the ability of frequency response and adjustment, but affected by the random fluctuation of wind speed, its operating conditions change frequently, and there are limited effectiveness and difficult reliability. Warranty question

In addition, the frequent participation of the unit in system power regulation will also lead to increased mechanical wear and reduced unit life.

[0006] Patent CN 103036249 B discloses a coordinated control method for wind storage clusters. It proposes that wind storage clusters meet the frequency regulation requirements of the power grid and dispatch power commands. The disadvantage is that the power distribution between wind farms and energy storage is qualitatively described, and there is no clear and quantitative method. Coordinated control method regulates power generation from energy storage and wind farms

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