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Multi-target voltage optimizing method of wind power plant cluster

A technology of voltage optimization and optimization method, which is applied in wind power generation, AC network voltage adjustment, single-network parallel feeding arrangement, etc., can solve unreasonable reactive power circulation between wind farms, without considering reactive power and voltage optimization between wind farms, There is no problem of mutual coordination and cooperation between wind farms, and the effects of reducing voltage offset, improving stability, and reducing active power loss are achieved.

Inactive Publication Date: 2014-11-19
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0003] At present, the voltage control method that takes wind farms as units and independently adjusts them does not realize the coordination and cooperation among wind farms in the wind farm cluster, which may lead to unreasonable reactive power circulation among wind farms, and cannot realize the optimal wind farm cluster. run
Such a wind farm cluster voltage control method model does not consider the reactive power and voltage optimization between wind farms within the cluster, which is unreasonable

Method used

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  • Multi-target voltage optimizing method of wind power plant cluster
  • Multi-target voltage optimizing method of wind power plant cluster
  • Multi-target voltage optimizing method of wind power plant cluster

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Embodiment Construction

[0040] specific implementation plan

[0041] The invention proposes a method for allocating active power of wind farm clusters in a power-limited state. The specific flow chart is as follows figure 1 shown. The method is characterized in that the method comprises the steps of:

[0042] Step 1: Obtain the wind power prediction information and reactive power adjustable capacity information of each wind farm in the wind farm cluster;

[0043] The wind farm cluster control system obtains the active power output information of each wind farm in the wind farm cluster in the next period through the wind power prediction system; the wind farm cluster control system obtains the adjustable capacity information of the wind farm according to the operating status of the wind turbines and reactive equipment in the wind farm.

[0044] Step 2: Establish a mathematical model for multi-objective voltage optimal control of wind farm clusters;

[0045] Step 201: Establish the voltage offset in...

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Abstract

The invention provides a multi-target voltage optimizing method of a wind power plant cluster. The wind power plant cluster is controlled as a whole, the minimum wind power plant grid-connection point voltage deviation, the minimum wind power plant cluster area transmission loss and the maximum wind power plant cluster voltage stabilization margin serve as the target functions, a wind power plant reactive power adjustable capacity constraint and wind power plant grid-connection point voltage upper and lower limit constraints are taken into account, the voltage optimized value of each wind power plant grid-connection point is obtained through optimizing calculation, and optimal control over the voltage of the wind power plant cluster is realized. The multi-target voltage optimizing method can be integrated in a wind power plant cluster control system and provides support for safe, stable and economical operation of the wind power plant cluster.

Description

technical field [0001] Power system automation voltage control technology field, new energy grid-connected dispatch control technology field. Background technique [0002] Most of the domestic wind farms are connected to the grid in a centralized manner and directly connected to the regional power grid. The installed capacity of wind farm clusters is very large, usually containing several to dozens of wind farms. The distance between the wind farms is relatively close, the electrical connection is close, and they have a high degree of coupling. When the voltage of one wind farm grid-connected point changes, the voltage of the adjacent wind farms will also be affected. [0003] At present, the voltage control method that takes wind farms as units and independently adjusts them does not realize the coordination and cooperation among wind farms in the wind farm cluster, which may lead to unreasonable reactive power circulation among wind farms, and cannot realize the optimal wi...

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Application Information

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IPC IPC(8): H02J3/12H02J3/38
CPCY02E10/76
Inventor 郑太一孙勇张志东杨国新高维罡范国英曹正李宝聚
Owner STATE GRID CORP OF CHINA
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