Method of considering different real-time frequency modulation capabilities of wind turbine generators for wind farm for participating in system coordination

Abstract

The invention discloses a method of considering different real-time frequency modulation capabilities of wind turbine generators for a wind farm for participating in system coordination. The method comprises the contents as follows: (1) a wind turbine generator unit detects a current wind speed and operation control information in real time and the wind turbine generators are dynamically classified according to the wind speed and the operation control information; (2) the wind turbine generators are matched with corresponding frequency modulation control strategies and frequency modulation parameters in real time according to current categories; and (3) a system detects a current frequency. According to the method, the wind turbine generators are dynamically classified according to the real-time wind speed, rotating speeds and unit control information and are matched with corresponding frequency modulation strategies and different frequency modulation threshold parameters in real timeaccording to different categories, the frequency modulation thresholds of the wind turbine generators under different working conditions are set from the wind farm and the system level, so that frequency modulation priorities of different power supplies and coordination are achieved through coordination of various frequency modulation control frequency setting values, the frequency stability of the system is improved at relatively low control and economic cost, and the problem that wind power participates in primary frequency modulation of a power grid and is matched with a traditional unit and DC frequency modulation is solved.

Description

technical field [0001] The invention relates to the technical field of electric power systems and automation thereof, in particular to a wind farm participation system coordination method with differentiated real-time frequency modulation capabilities of wind turbines. Background technique [0002] With the large-scale new energy grid-connected power generation, the penetration rate is gradually increasing, and new energy power generation is bound to replace some conventional energy generating units. At present, the doubly-fed variable-speed fan and the direct-drive permanent magnet fan commonly used in my country can not provide frequency support for the grid when the grid frequency changes because the control system completely decouples the speed of the unit from the frequency of the grid, and cannot participate in the primary frequency regulation of the grid. . Although wind turbines have inertia, they appear as "implicit inertia" to the grid, which cannot help the grid t...

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Problems solved by technology

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a wind farm participation system coordination method with differentiated real-time frequency modulation capabilities of wind turbines, to solve the problem of wind power participating in primary frequency modulation of the power grid and coordinating with traditional units and DC frequency modulation problem, improve the frequency stability of the wind power centralized grid-connected area system

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