Active power control method in wind power plant

A technology of active power and control method, which is applied in the field of power system planning and operation, and can solve problems such as the negative impact of power system economy

Active Publication Date: 2013-09-11
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0005] The ultra-short-term forecasting of wind farms can predict the wind power within 4 hours in the future. Since the existing forecasting methods have certain errors, if the ultra-short-term forecasting power is directly applied to dispatching, it will have a negative impact on the economy of the power system.

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  • Active power control method in wind power plant
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  • Active power control method in wind power plant

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Embodiment Construction

[0057] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0058] Such as figure 1 , the wind farm active power optimization control method considering confidence includes the following steps:

[0059] (1) Input the historical predicted power data and actual power data of the wind farm, and calculate the distribution function of the wind farm active power prediction error;

[0060] (2) Analyze the prediction error of the wind farm, select an appropriate confidence level, and calculate the confidence interval of the wind farm prediction power;

[0061] (3) Group the wind turbines according to the collected real-time power data of the wind turbines;

[0062] (4) Use the effective set algorithm to optimize and find the optimal confidence weight of each unit group;

[0063] (5) Based on the calculated confidence weights, the active power of the wind farm is optimally controlled.

[0064] The following is an actual ca...

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Abstract

The invention provides an active power control method in a wind power plant. The active power control method in the wind power plant comprises the steps of computing the active power prediction errors of all predicted points in the wind power plant, establishing a wind power plant active power prediction error distribution function, establishing a wind power plant active power prediction error distribution module, a wind power plant active power prediction confidence degree module and a wind power plant active power control module in sequence, optimizing the wind power plant active power control module, obtaining an optimization confidence weight of all unit sets, and controlling the active power of the wind power plant. The active power control method in the wind power plant is based on historical data analysis. By means of the active power control method in the wind power plant, the power-outputting error of the wind power plant is reduced, the reliability and accuracy of the wind power plant are guaranteed, and a powerful guarantee is supplied to the wind power plant in the grid-connected operation.

Description

technical field [0001] The invention belongs to the technical field of power system planning and operation, and in particular relates to a method for controlling active power of a wind farm. Background technique [0002] According to the draft of the national "New Energy Industry Revitalization Plan", the total installed capacity of wind power in my country will reach 150 million kilowatts in 2020, which is five times the goal of the "Renewable Energy Medium and Long-Term Development Plan" released in 2007. According to the plan, my country will build seven 10 million-kilowatt wind power bases in Gansu, Xinjiang, Hebei, Jilin, Inner Mongolia, and Jiangsu. Gansu Jiuquan 10 million-kilowatt wind power base construction plan has a total installed capacity of 35.65 million kilowatts; Xinjiang Hami plans to build 20 million kilowatts; Inner Mongolia plans to build 50 million kilowatts, including 20 million kilowatts in western Mongolia and 30 million kilowatts in eastern Mongolia...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/48
CPCY02E10/76
Inventor 郭剑波郭小江谢杨汤奕张玉红王雅婷孙玉娇
Owner STATE GRID CORP OF CHINA
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