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Method of controlling inertia in wind farm

A wind power plant and inertial control technology, which is applied in the control of wind turbines, wind power generation, engine control, etc., can solve the problems of reducing wind power plants, reducing the influence of frequency recovery, etc., and achieve the effect of frequency recovery

Inactive Publication Date: 2014-12-24
IND COOP FOUND CHONBUK NAT UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the above approach can help with frequency recovery until before the frequency bounce, but after the frequency bounce, the output of the wind farm will be reduced due to the opposite sign of the frequency change rate, and as a result, the need for frequency recovery is reduced. degree of influence

Method used

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  • Method of controlling inertia in wind farm

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Embodiment Construction

[0024] Before describing the present invention in detail, the term "wind power plant" used in the present invention is a concept including one or more wind power generators. In other words, a wind turbine is also described using wind power plant terms.

[0025] Accordingly, the term controlling a wind power plant is understood to include the meaning of controlling not only a wind power plant comprising a plurality of wind power generators, but also a single wind power plant, and in wind power plants themselves plural In this case, controlling each wind power plant also belongs to the "wind power plant control" of the present invention. Furthermore, the term "voltage of a wind power plant" should be understood as a concept that includes not only the voltage of an individual wind power generator, but also the voltage of a wind power plant composed of wind power generators.

[0026] The inertia control method of the present invention is applicable to controlling wind power gener...

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Abstract

The present invention relates to a method of controlling a wind farm and, in more details, relates to a method of controlling inertia in a wind farm. The method of controlling inertia in a wind farm includes the folling steps: obtaining information about the frequency of an electrical grid which has been received from the electrical grid or calculated using the voltage of the wind turbine, receiving information about the rotor speed of the wind turbine, calculating the kinetic energy of the wind turbine using the information about the rotor speed, calculating an individual droop coefficient of the wind turbine using the calculated kinetic energy, and controlling the wind turbine using the calculated droop coefficient.

Description

technical field [0001] The present invention relates to a method for controlling a wind power plant, and in more detail, relates to a method for quickly replenishing insufficient electric energy to the grid and returning to a normal operating state in the case of a disturbance such as a trip of a generator in the grid. A method of controlling a wind turbine. Background technique [0002] If there is a disturbance in the grid such as a generator trip or a load increase, there will be a shortage of power and the frequency of the grid will decrease. In China, when the frequency becomes 59Hz, in order to prevent continuous tripping of the generator, the Under frequency load shedding (UFLS) relay is activated to cut off 6% of the load, and every time the frequency is reduced by 0.2Hz, an additional Cut off 6% of the load. Therefore, after a disturbance occurs, the lowest frequency of the power grid is an important criterion for determining system reliability, and in order to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCF03D7/0284F03D7/046F05B2270/337H02P2101/15H02J2300/28H02J3/381Y02E10/72Y02E10/76H02J3/48F03D7/00
Inventor 姜龙澈金阧兖李真植金烟熙金镇镐
Owner IND COOP FOUND CHONBUK NAT UNIV
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