Primary frequency regulation method of variable speed wind turbine based on overspeed and pitch coordination

A variable speed wind turbine, wind turbine technology, applied in wind power generation, single grid parallel feeding arrangement, etc., can solve problems such as lack of theoretical analysis and optimization

Active Publication Date: 2015-12-02
STATE GRID CORP OF CHINA +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on variable-speed wind turbines participating in system frequency regulation mainly focuses on how to realize the frequency regulation function, lacking in-depth theoretical analysis and optimization research

Method used

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  • Primary frequency regulation method of variable speed wind turbine based on overspeed and pitch coordination
  • Primary frequency regulation method of variable speed wind turbine based on overspeed and pitch coordination
  • Primary frequency regulation method of variable speed wind turbine based on overspeed and pitch coordination

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Embodiment Construction

[0052] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0053] like figure 1 shown, figure 1 is the flow chart of the method; the method of the present invention comprises the following steps:

[0054] Step 1. Provide a load shedding operation plan for the variable speed wind turbine;

[0055] Step 2. Determine that the variable-speed wind turbine operates according to the load-shedding operation plan;

[0056] Step 3. Determine whether the variable speed wind turbine participates in the system frequency modulation;

[0057] Step 4: Activate the primary frequency modulation control module to make the variable speed wind turbine participate in the primary frequency modulation of the system.

[0058] In step 1, a load shedding operation plan for the variable speed wind turbine is provided.

[0059] Because the variable speed wind turbine is based on the maximum power tracking control m...

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Abstract

The invention provides an over-speed and variable pitch coordination-based variable speed wind turbine generator set primary frequency modulation method. The method comprises the following steps of: 1) providing a load reduction operation scheme for an variable speed wind turbine generator set; 2) determining that the variable speed wind turbine generator set operates according to the load reduction operation scheme; 3) judging whether the variable speed wind turbine generator set participates in system frequency modulation; and 4) activating a primary frequency modulation control module to enable the variable speed wind turbine generator set to participate in the system frequency modulation. With the method adopted, changes of the kinetic energy of a wind turbine are fully considered when active spare capacity is reserved, and the output capacity of the wind turbine itself can be effectively utilized; and when power?shortage occurs on a system, and the frequency of the system is decreased, continuous active power support can be provided, and improvement of the stability of the frequency of the power system can be facilitated.

Description

technical field [0001] The invention relates to a method for grid-connected wind turbines in the new energy power generation technology, in particular to a primary frequency modulation method for variable-speed wind turbines based on overspeed and pitch coordination. Background technique [0002] As more and more large-capacity wind farms are directly integrated into the power grid, the penetration rate of wind power continues to increase, making the interaction between wind power and the power grid more and more complex. Variable-speed wind turbines are the main models in commercial operation today. The frequency converter control technology is used to decouple the rotor speed of the wind turbine from the system frequency, which reduces the equivalent moment of inertia of the system. The higher the wind power penetration rate, the more unfavorable the system frequency stability. . In order to obtain the maximum utilization rate of wind energy, the DFIG usually operates in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46
CPCY02E10/763Y02E10/76
Inventor 迟永宁王伟胜田新首李琰董存汤海雁张占奎王真孙蔚苏媛媛魏林君王志冰
Owner STATE GRID CORP OF CHINA
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