Method for cooperatively controlling reactive voltage of wind farm

A technology of coordinated control and wind farms, applied in the direction of control systems, control generators, electrical components, etc., can solve the problems of lack of mutual coordination, excess, frequent regulation of wind turbines, etc.

Active Publication Date: 2010-10-13
XUJI GRP +1
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Problems solved by technology

[0005] First, the WindVAR system uses the wind turbine as the control unit, lacks unified planning for the reactive power of the entire wind farm, and the wind turbine autonomous control
Once the output reactive power of some wind turbines in the wind farm reaches the limit, each wind turbine is relatively autonomous and lacks mutual coordination, resulting in insufficient or excess reactive power compensation for the entire fi...

Method used

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  • Method for cooperatively controlling reactive voltage of wind farm
  • Method for cooperatively controlling reactive voltage of wind farm
  • Method for cooperatively controlling reactive voltage of wind farm

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Embodiment Construction

[0037] The wind farm reactive power and voltage coordinated control method of the present invention is abbreviated as Focus on how the entire wind farm participates in the reactive power and voltage control of the grid from the perspective of the system. The influence of the reactive power output characteristics of wind farms on the voltage of the power grid in the connected area is closely related to the topology, connection mode and operation mode of the power grid.

[0038] For a wind farm consisting of dozens or even hundreds of wind turbines with dynamic reactive power adjustment capability, the difficulty of reactive power control lies in how to coordinate the relationship between the reactive power control of the wind farm and the reactive power control of the wind turbines. Due to the relatively small capacity of wind turbines, the reactive power adjustment of a single wind turbine cannot bring significant changes to the voltage of the wind farm and the access point. ...

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Abstract

The invention relates to a method for cooperatively controlling reactive voltage of a wind farm. In the method, a reference voltage value of a busbar is calculated through a logic link according to measured active power, reactive power and a given reference value of reactive power, and the reactive power of each wind turbine is regulated in real-time based on the reference voltage value. The method can cooperatively control reactive output of each wind turbine to enable reactive output of a grid-connection point of a wind farm to meet the variation of system loads so as to restrain the fluctuation of busbar voltage caused by the variation of surrounding loads as well as resist voltage fall of a control point caused by faults of a local electric network, thereby maintaining stable voltage of the wind farm accessing a regional power grid.

Description

technical field [0001] The invention relates to a coordinated control method for wind farm reactive voltage, and belongs to the technical field of wind farm grid-connected control. Background technique [0002] The strategy of sustainable social development requires increasing the utilization of renewable clean energy power generation. As one of the most mature renewable energy power generation methods, wind power will definitely be vigorously developed. For this reason, the impact of wind power access on the power system, the characteristics of wind turbine grid-connected operation, and the control methods of wind turbines in different operating modes of the system have attracted more and more attention. The rapid development of wind power has brought many new problems to the power system, among which the problem of reactive power and voltage is one of the most prominent and most concerned problems. [0003] Early grid-connected wind farms mainly use constant-speed asynchr...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02P9/00
Inventor 雷宪章吕志来陆一川吴晓明曹辰薛飞卢润东王炯朱颖张聪
Owner XUJI GRP
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