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Voltage/reactive power comprehensive intelligent control method for wind farm

A technology of intelligent control and comprehensive control, applied in the direction of reactive power compensation, adaptive control, general control system, etc., can solve the problems of inability to obtain control effect and trouble fuzzy information processing technology, so as to improve low-voltage ride-through capability and reduce frequent Action, the effect of improving the utilization rate

Inactive Publication Date: 2011-04-13
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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AI Technical Summary

Problems solved by technology

[0006] However, the extraction of fuzzy rules and the optimization of membership functions in fuzzy control are difficult problems that plague fuzzy information processing technology
The fuzzy control rules and membership functions obtained by using the experience of experts have a large degree of uncertainty, so applying such a control strategy directly to the control often fails to obtain ideal control effects

Method used

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  • Voltage/reactive power comprehensive intelligent control method for wind farm
  • Voltage/reactive power comprehensive intelligent control method for wind farm
  • Voltage/reactive power comprehensive intelligent control method for wind farm

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Embodiment Construction

[0018] The adjustment object of the present invention is the voltage and reactive power value at the high-voltage side of the transformer, that is, the grid-connected node. Combining the advantages of the fuzzy control and the intelligent control method of the neural network, the relevant knowledge and control experience of the power system are expressed as language rules for reactive power In the comprehensive voltage control, the control ability of the power quality of the wind farm is effectively improved. Change the previous discrete control mode of wind farms, integrate wind turbines, SVC and other continuous reactive power switching equipment, and comprehensively control the wind farm as a whole. When the voltage is too low, the reactive power is adjusted by switching the reactive power equipment to maintain the voltage and improve the low-voltage ride-through capability of the wind farm fan.

[0019] The structure diagram of the voltage / reactive power integrated control...

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Abstract

The invention belongs to the field of electric system control, and particularly relates to a voltage / reactive power comprehensive intelligent control method for a wind farm. In the method, a knowledge base and a fuzzy control table are formed by adopting intelligent technology based on a neural network and fuzzy control and combining a certain experience and knowledge of an electric power system, namely a control chart of the ninth region, without accurate mathematical models, so that the comprehensive control of voltage reactive power of the wind farm is realized. Therefore frequent action caused by voltage fluctuation is reduced, the comprehensive reactive power voltage control over the wind farm is realized, the ideal control effect which the conventional control method is difficult to achieve is achieved, and the control ability on the quality of electric energy is improved greatly.

Description

technical field [0001] The invention belongs to the field of power system control, and in particular relates to a voltage / reactive power comprehensive intelligent control method of a wind farm. Background technique [0002] With the rapid development of wind power in my country and the continuous increase of wind farm grid-connected capacity, the power grid has put forward higher requirements for the quality of power output by wind farms. Due to the randomness of wind energy, there are certain errors in wind speed prediction, wind farms cannot provide stable power, and the stability of power generation is poor; in addition, power fluctuations in wind farms will affect the power quality of the local power grid, resulting in voltage fluctuations. Therefore, the wind farm requires the control of reactive power and voltage within a certain range to ensure the quality of power supply. [0003] Because the reactive power and voltage of wind farms are difficult to predict, most of...

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Application Information

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IPC IPC(8): H02J3/38H02J3/18G05B13/04
CPCY02E40/30Y02A30/60
Inventor 刘婷婷王志凯
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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