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.
CN101860044AActive Publication Date: 2010-10-13XUJI GRP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XUJI GRP
Publication Date
2010-10-13

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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.
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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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