Wind power plant voltage automatic control method based on model predictive control theory

A technology of model predictive control and voltage control method, applied in the direction of active/predictive/predictive control, wind power generation, adaptive control, etc., can solve problems such as failure to provide support, exhaustion, etc.

Active Publication Date: 2014-12-24
TSINGHUA UNIV
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Problems solved by technology

When the wind fluctuates rapidly and the reactive power adjustment of the wind turbine is limited, the SVC/SVG will track the voltage target, and it is eas

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  • Wind power plant voltage automatic control method based on model predictive control theory
  • Wind power plant voltage automatic control method based on model predictive control theory
  • Wind power plant voltage automatic control method based on model predictive control theory

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Embodiment Construction

[0055] The wind farm voltage control method based on the model predictive control theory proposed by the present invention is described in detail as follows in conjunction with the embodiments:

[0056] The wind farm voltage control method based on the model predictive control theory proposed by the present invention is used in the AVC system control of the wind farm. Do the following steps:

[0057] 1) Collect the current measured values ​​of various electric quantities in the system as the initial values ​​of the predicted values ​​of various electric quantities. The predicted values ​​include: the predicted value of active power of the fan Predicted value of fan reactive power Predicted value of fan terminal voltage SVG reactive power prediction value Predicted value of SVG terminal voltage Predicted value of busbar voltage at grid connection point (PCC) of wind farm

[0058] 2) set up the MPC optimization control model that is made up of optimization objective ...

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Abstract

The invention relates to a wind power plant voltage automatic control method based on a model predictive control theory, and belongs to the technical field of electric power system wind power plant voltage automatic control. The method includes the steps that various current electric quantity measured values of a system are collected and serve as initial values of various electric quantity predicted values, and an optimized control model composed of an optimized objective function and constraint conditions is established according to the predicted values; the optimized control model is simplified, the simplified optimized control model is solved through an optimization tool, and solution sequences of reactive set values of a draught fan and voltage set values of an SVG in an MPC time window are acquired; first values in the solution sequences serve as control objectives and are issued to the draught fan and the SVG respectively, and therefore wind power plant voltages are automatically controlled. The method can be integrated in the automatic voltage control system for wind power plant field operation, and the system can carry out an optimum control strategy in real time according to the power change of a wind power plant.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage control of wind farms in power systems. Background technique [0002] In recent years, the wind power grid-connected capacity has continued to grow rapidly, and voltage problems in large-scale wind power collection and grid-connected areas have been accompanied by it. The distribution of my country's wind energy resources is far away from the load center, and most of the wind power is connected to the weak power grid that lacks the support of conventional hydro-thermal power plants. The regional voltage is easily affected by the active and reactive power of the wind field. When the gust passes by, the wind power may fluctuate sharply within minutes, which will cause the voltage of the PCC (Point of Common Coupling) of the wind farm to fluctuate violently. [0003] Most of the wind farms currently put into operation on site refer to the design of voltage controllers in traditional therma...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/18
CPCF03D7/028F03D7/045F05B2270/404Y02E10/72G05B13/048G06F17/10
Inventor 郭庆来孙宏斌王彬张伯明吴文传徐峰达
Owner TSINGHUA UNIV
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