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Method for distributing active power of wind power station

A wind farm, active power technology, applied in wind power generation, control of generators, electrical components, etc., can solve problems such as grid instability, low wind power generation quality, and no active power distribution function, and achieve output power fluctuations. The effect of smooth change, optimized active power distribution, and avoiding frequent start and stop

Inactive Publication Date: 2013-04-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most domestic wind farms do not have the function of active power distribution, which is also an important reason for the low quality of domestic wind power generation and the instability of the power grid.

Method used

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  • Method for distributing active power of wind power station
  • Method for distributing active power of wind power station
  • Method for distributing active power of wind power station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] figure 1 is the active power control diagram of the wind farm

[0032] Such as figure 1 As shown, in this embodiment, the wind farm determines the power setting power of the wind farm according to the power forecast and grid scheduling information. The power measurement value is the real-time total generated power value of the entire wind farm. The purpose of power control is to ensure that the output power of the wind farm fluctuates smoothly, and to make the real-time output power of the wind farm reach the set value of the wind farm, so as to achieve the purpose of power control.

[0033] In this example, figure 1 The middle wind turbine controller is responsible for monitoring the operating status and operating parameters of the wind generator, and returning the operating status of the wind generator to the power distribution module. The power distribution module distributes the set power of the wind farm to the corresponding wind generating sets according to th...

example

[0057] Apply the power distribution strategy of the present invention to a certain domestic regional power grid that actually includes wind power generation. The regional power grid includes several large wind farms. A certain wind farm is selected as the monitoring area. The wind farm includes 66 wind farms that are normally connected and can be controlled. , collect the final power distribution results of each wind turbine.

[0058] Image 6 It is a schematic diagram of active power control of a wind farm. The number next to the unit in the figure is the identification number of the wind power generation unit in the wind farm. Classify each wind turbine by collecting data such as power, fault code, and operating status of each wind turbine. For the sake of simplification, in this embodiment, only the unit classification of the first ring network is discussed. In the ring network, the 3#, 10#, and 14# wind turbines return the power data in the data message to 0, and the fau...

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Abstract

The invention discloses a method for distributing active power of a wind power station, comprises the steps of predicating the power information and classifying a wind power generating unit into five types according to the operating parameter and fault of the wind power station, combining with the unit classification and executing an increasing and decreasing power distribution strategy, thereby the distribution of the active power of the wind power station is optimized and the use ratio of the wind power unit is improved. As the factors of the unit, such as the actual operating state, parameter and fault are considered in the active power distribution method, the fluctuation of the output power of the wind power station is varied slowly and stable operation is achieved by reasonably distributing the power to the units according to the increasing and decreasing power adjusting ability of the unit, and the real-time output power of the wind power station reaches the setting value of the wind power station. At the same time, the declining power distributing strategy is divided into deep amplitude limit power distributing strategy and light amplitude limit power distributing strategy, thereby the declining power requirement is met in the distribution process, the frequent start or stop of the unit is avoided and reasonable operation of the unit is ensured.

Description

technical field [0001] The invention belongs to the technical field of active power distribution of wind farms, and more specifically relates to an active power distribution method for uniformly controlling the generating power of all wind generators in a wind farm to ensure the stability of a power grid and the quality of output power from a wind farm. Background technique [0002] The global energy shortage and the increasingly serious environmental pollution problems have led to the rapid development of clean energy wind power generation in the world, and the proportion of wind power generation in the grid continues to increase. However, wind power generation is greatly affected by wind speed and has strong randomness and intermittency. After large-scale wind power grid integration, the power quality of the power system is not high, and the difficulty of dispatching increases, which seriously affects the security and stability of the power grid. Comprehensive control of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02P9/04H02J13/00
CPCY02E40/72Y02E10/763Y04S10/123Y02E10/76Y02E40/70
Inventor 邹见效徐红兵郑刚
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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