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Wind farm group, wind farm and control method thereof

A technology of wind farm group and control method, which is applied in the control of wind turbines, wind power generation, wind turbines, etc., can solve problems such as voltage fluctuations or frequency fluctuations, and achieve the effect of suppressing power fluctuations

Inactive Publication Date: 2009-07-01
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, with the conventional fluctuation suppression method, the power output from a single wind farm has a medium-to-long-period fluctuation of approximately 10 minutes or more
Therefore, in the future, as the introduction of wind farms progresses and the proportion of wind farm generation capacity to the total power generation capacity of the power system increases, the medium and long-term fluctuations in the output of each wind farm connected to the public power system will add up and contribute to The output power of the power system fluctuates greatly, which has adverse effects such as voltage fluctuations or frequency fluctuations on the power sources (such as thermal power plants or nuclear power plants, etc.) or loads (consumers) connected to the power system

Method used

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  • Wind farm group, wind farm and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 is a single-line structural diagram showing the device structure of an embodiment of the present invention. First, the configuration of the power system will be described. A power generation facility 101 of the power system is connected to loads 102 such as factories and households, and wind farms (WF1, WF2, . . . ). In this embodiment, the case where there are two wind farms is particularly described, but the present invention can also be applied when there are three or more wind farms. Also, since the structures of the wind farms are almost the same, one wind farm will be mainly explained. Power from a power generation facility 101 of the electric power system is transmitted using a power transmission line 103 (in the figure, a transformer for voltage level conversion and the like are omitted).

[0033] The structure of the wind farm WF1 will be described. The wind farm WF1 has a field controller 104 that monitors and controls the entire inside of the win...

Embodiment 2

[0066] In Embodiment 1, an example was shown in which the power limit value was given as a constant upper limit at night, but the power limit requested from the electric system may be given so that the fluctuation range of generated power becomes equal to or less than a predetermined value. Therefore, in this embodiment, an embodiment of the invention in which the power limit value is provided by the fluctuation range of the generated power will be described in detail. In addition, this embodiment is the same as that of embodiment 1 except for the configuration described in particular.

[0067] Figure 13 It shows the power generation state of the present invention when the power limitation is defined so that the fluctuation range of the generated power falls within a predetermined range. The power limit value P1lim of the wind farm WF1 is output as an upper limit value P1A and a lower limit value P1B by a predetermined calculation for making the fluctuation range of the gene...

Embodiment 3

[0073] Next, use Figure 14 , to illustrate other embodiments of the present invention.

[0074] Figure 14 Operations at the time of operation to suppress fluctuations in generated power of a wind farm will be described.

[0075] In order to suppress output fluctuations, the controller 104 of the wind farm WF1 uses a filter such as a linear lag or a moving average for the generated power P1 of the wind farm, and uses the power value (low frequency component) output by the filter as the command value P1ref to control the wind farm WF1. . Therefore, a power generation command is allocated to each power generator in the wind farm (for example, a power generation command value is generated in consideration of the operation status of each power generator, the capacity of each power generator, etc., and distributed to each power generator in the wind farm).

[0076] Since the same applies to the wind farm WF2, description thereof will be omitted.

[0077] The wind farm WF1 work...

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Abstract

The present invention provides a wind farm. The introducing of wind power generation system (wind farm) advances continuously, and the effect to the power source (such as heat power station) of electrical power system and load enlarge. When the wind power generation system outputs generated power, the effect to the power source of electrical power system is increased. Additionally, as the wind power generation system restrains the output which formerly can generate power according to the request from the side of electric power system at the state that the upper limit value of power generationis set, the amount of generated power is reduced. The wind farm is provided with a component which exchanges the respectively set upper limit value of power generation and information of power generation between the wind power generation systems (wind farms) of different places and outputs the generated power according to a mode that the summation of wind farm is brought into the summation of upper limit value of power generation.

Description

technical field [0001] The present invention relates to a wind power generator for supplying power generated by wind energy to an electric power system, a wind farm composed of a plurality of wind power generators, and a wind farm group composed of a plurality of wind farms. Background technique [0002] The following Patent Document 1 discloses that in a wind farm composed of a plurality of wind power generators, a target power generation amount is set for the wind farm, and in order to bring the total output power of each wind power generator constituting the wind farm close to the target A wind farm that exchanges information such as maintenance history data and operating characteristic data between wind power generators to determine the operation mode of the wind power generator. In addition, Patent Document 1 discloses a method of performing operation in consideration of economic efficiency in one wind farm by yaw control and pitch control when outputting a target power...

Claims

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Application Information

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IPC IPC(8): F03D7/04
CPCY02E10/723Y02E10/725Y02E10/72
Inventor 一濑雅哉二见基生松竹贡中山靖章今家和宏大野康则
Owner HITACHI LTD