Wind farm active power control method

A technology of active power and control method, applied in the field of electric power engineering, can solve problems such as poor power generation stability, wind farms cannot provide stable power, and voltage fluctuations

Active Publication Date: 2017-03-29
BEIJING STATE GRID PURUI EXTRA HIGH VOLTAGE POWER TRANSMISSION TECH CO LTD +1
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Problems solved by technology

However, wind energy is an intermittent energy source, and there are certain errors in wind speed prediction. The wind farm cannot provide stable power, and the stability of power generation is poor. In addition, the power fluctuation of the wind farm will affect the power quality of the local power grid, resulting in voltage fluctuations and flashes. Change

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Embodiment Construction

[0082] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0083] Such as figure 1 As shown, the present invention provides a method for controlling active power of a wind farm, comprising the following steps:

[0084] Step 1. Retrieve the operation data of the wind farm, and obtain the input parameters of the active power control model of the wind farm according to the operation data;

[0085] Step 2. According to the input parameters, the average distribution model and the economic operation distribution model of...

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Abstract

The invention provides a wind farm active power control method. The active power output of a wind farm is dynamically adjusted online by means of variable pitch and startup-shutdown according to a scheduling order of a power grid and under the premise of ensuring the service life of fans, considering the working conditions of fans and reducing fan failure. According to the control method put forward by the invention, a set value can be tracked quickly and accurately, and the generation power can be limited below a limit value by overshooting. When a unit is shut down due to failure, a target generation power can be allocated according to the failure state of the unit to make the real-time generation power quickly restore to a target value. Through centralized control on wind turbine generator units in a wind farm by use of the power control method, the quality of electric energy output by the wind farm is improved, the stability of the output power of the wind farm is ensured, and the adverse impact of the randomness and volatility of wind power generation on the power grid is reduced.

Description

technical field [0001] The invention relates to the field of electric power engineering, in particular to a method for controlling active power of a wind farm. Background technique [0002] With the continuous development of science and technology and the depletion of fossil energy, wind power technology has developed rapidly. More and more large and medium-sized wind farms have been built and put into operation one after another, and the proportion of wind power in the power grid is also increasing, and it will become an important supplement to the power system in the future. However, wind energy is an intermittent energy source, and there are certain errors in wind speed prediction. The wind farm cannot provide stable power, and the stability of power generation is poor. In addition, the power fluctuation of the wind farm will affect the power quality of the local power grid, resulting in voltage fluctuations and flashes. Change. Therefore, large-scale wind farms (herein...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46
CPCY02E10/76
Inventor 刘娟陈光鲁丽萍姚春琴余英李武峰王献丽张强
Owner BEIJING STATE GRID PURUI EXTRA HIGH VOLTAGE POWER TRANSMISSION TECH CO LTD
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