Wind farm reactive voltage control method

A voltage control method and technology of voltage control, applied in reactive power compensation, AC network voltage adjustment, etc., can solve problems such as voltage oscillation and lack of coordination, and achieve the effect of maintaining voltage stability and suppressing bus voltage fluctuations

Active Publication Date: 2013-03-13
NARI NANJING CONTROL SYST
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, in wind farms built in multiple phases, multiple SVCs and SVGs often coexist. Due to the lack of coordination of multiple reactive power compensation devices, voltage oscillations are prone to occur during adjustment.

Method used

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  • Wind farm reactive voltage control method
  • Wind farm reactive voltage control method
  • Wind farm reactive voltage control method

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Embodiment Construction

[0040] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention will be further explained below in conjunction with specific embodiments.

[0041] The invention takes the grid-connection point voltage of the wind farm as the control target, and takes the reactive power as the adjustment amount, and through the coordinated control of the wind turbine and the reactive power compensation device, the grid-connection point voltage meets the grid voltage requirements.

[0042] Such as figure 1 Shown is a flowchart of the method for controlling reactive power and voltage of a wind farm of the present invention. The method of this embodiment includes the following steps:

[0043] (1) Measure the real-time value U of the voltage at the grid connection point of the wind farm mea , Calculate the real-time value of voltage U mea And the grid point voltage target value U target The absolute value of the di...

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Abstract

The invention discloses a wind farm reactive voltage control method. The method comprises steps of (1), measuring wind farm synchronization point voltage; (2), determining whether the wind farm synchronization point voltage meets requirements of a grid; (3), calculating system impedance; (4), calculating the reactive target value of the wind farm synchronization point; (5), determining whether all wind generation sets and all reactive power compensation devices meet preset protection restriction conditions; (6), primarily distributing the reactive target value between wind generation sets and reactive power compensation devices; (7), secondarily distributing results of the primary distribution; (8), transmitting reactive control commands to wind generation sets and reactive power compensation devices; and (9), returning to the step (1) after wind generation sets and reactive power compensation devices execute commands. The wind farm synchronization point voltage serves as a control target, the reactive power of the wind farm serves as an adjusting amount, the reactive power output of the wind farm synchronization point can meet change of system load and grid voltage requirements and the wind farm synchronization point voltage keeps stable.

Description

Technical field [0001] The invention relates to a method for controlling reactive power and voltage of a wind farm, belonging to the technical field of wind power generation. Background technique [0002] In recent years, wind power has been vigorously developed as a renewable clean energy power generation. Wind power is random, intermittent and uncontrollable. The large-scale access of wind power has a great impact on the safe operation of the power system. Among them, the problem of reactive power and voltage is the most concerned and the most common in actual operation. One of the problems. [0003] With the development of wind power technology, wind turbines have realized the decoupling control of active and reactive power, which can independently adjust active and reactive power. Wind turbines can be used as important reactive power sources for wind farms. However, in actual operation, wind turbines basically did not participate in reactive power regulation, resulting in idl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16
CPCY02E40/34Y02E40/30
Inventor 刘双张建周柏嵩严涛松
Owner NARI NANJING CONTROL SYST
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