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A wind farm power coordinated control method and system

A technology for coordinated control and wind farms, applied in reactive power adjustment/elimination/compensation, wind power generation, AC network voltage adjustment, etc., can solve problems affecting the stability of the power grid, improve safety, avoid frequent actions, and improve The effect of grid friendliness

Active Publication Date: 2021-04-30
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, when the grid fails or is disturbed, the asynchronous wind turbine needs to absorb a large amount of reactive power from the grid, which will affect the stability of the grid operation

Method used

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  • A wind farm power coordinated control method and system
  • A wind farm power coordinated control method and system
  • A wind farm power coordinated control method and system

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Embodiment Construction

[0062] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0063] my country's GB / T 19963-2011 requires wind turbines to have ±0.95 power factor adjustment capabilities, and the ratio of reactive power to active power is about 1:3. The reactive power and pressure regulation capacity of the unit has not been effectively utilized. Therefore, the reactive power distribution of the wind farm can give priority to the use of the reactive power capacity of the wind turbines, and fully consider the influence of the reactive power output of the wind turbines at different locations on the reactive power sent by the wind farm outlet; when the target reactive power value of the wind farm exceeds the adjustable reactive power of the wind farm When the limit is reached, the reactive power compensation device configured in the wind farm is used for adjustment.

[0064] The reactive power regulation of the wind farm is realized by the wind f...

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Abstract

The present invention provides a wind farm power coordinated control method and system, characterized in that the method includes: determining the reactive power control working mode of the wind farm according to the grid dispatching command; calculating the reactive power loss of the wind farm; Calculate the total reactive power demand of the wind farm according to the working mode and reactive power loss of the wind farm; allocate the total reactive power demand of the wind farm according to the pre-set allocation principle of the total reactive power demand of the wind farm, and judge whether the total reactive power demand of the wind farm is If the reactive power output limit of the wind turbine is exceeded, the total reactive power demand of the wind farm will be borne by the wind turbine. If it exceeds, the wind turbine will firstly bear it, and the excess part will be borne by the reactive power compensation device. The technical method provided by the invention improves the "grid friendliness" of the wind farm, improves the safe and stable operation level of the grid in areas where large-scale wind power is centrally connected, and promotes the improvement of the wind power consumption capacity of the grid.

Description

technical field [0001] The invention relates to access and control of new energy sources, in particular to a wind farm power coordination control method and system. Background technique [0002] Wind power has the advantages of rich resources and low pollution, and has been paid more and more attention by countries all over the world. Wind power technology is developing rapidly. At present, wind power has surpassed hydropower to become the second largest power source. Wind power is undergoing a role change from supplementary energy to alternative energy. The network source structure and operation mode of the power system are undergoing profound changes. The risk of grid operation in areas where large-scale wind power is connected to the grid is increasing and the safety margin is decreasing. [0003] Wind energy is volatile, and wind speed and wind direction are random and uncontrollable, which has become the root cause of poor stability of wind power generation. When the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/50H02J3/16
CPCH02J3/16H02J3/18H02J3/50Y02E10/76Y02E40/30
Inventor 秦世耀代林旺王瑞明李少林张利陈晨于雪松
Owner CHINA ELECTRIC POWER RES INST
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