Method for constructing wind power plant frequency domain equivalent model

A technology for constructing methods and equivalent models, which is applied in the field of effective modeling and can solve problems such as lack of simple and accurate methods, difficulties, etc.

Active Publication Date: 2014-03-05
HOHAI UNIV +3
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Problems solved by technology

Due to the complexity of the environment and spatial distribution of wind farms, the spatial relationship between each wind turbine and its surrounding turbines requires a large number of parameters to describe. It is very difficult to establish a detailed mo...

Method used

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  • Method for constructing wind power plant frequency domain equivalent model
  • Method for constructing wind power plant frequency domain equivalent model
  • Method for constructing wind power plant frequency domain equivalent model

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Embodiment Construction

[0046] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0047] 1. The principle and steps of establishing a frequency domain model of a wind farm

[0048] figure 1 The input signal of the overall equivalent frequency domain model of the wind farm is shown in , where the first wind speed is used as the input of the equivalent modeling of the wind farm, with v 0 (t) indicates that the output signal is the active power of the wind farm.

[0049] Combine below Figure 2-Figure 4 As shown, the principle and steps of establishing the positive wind speed channel frequency domain model of the wind farm and the negative wind speed channel frequency domain model of the wind farm in this method are explained.

[0050] Step 1: Establish the frequency domain model of the positive wind speed channel of the wind farm

[0051] "Positive wind speed channel" is used ...

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Abstract

The invention provides a method for constructing a wind power plant frequency domain equivalent model. The wind speed at a certain point in a wind power plant space is used as an input quantity, the total active power of a wind power plant is used as an output quantity, the overall frequency domain equivalent model of the wind power plant is built, the model is divided into a positive wind speed channel and a negative wind speed channel, the positive wind speed channel represents and meters the energy transformational relation of the wind power plant after time-lag, wake flow, a tower shadow, wind shear and other space influence factors, and the negative wind speed channel represents the total cut-down function of each wind power generation set pitch angle controller in the wind power plant on excess wind power. The method avoids the difficulty of accurately building the models of the time-slag, the wake flow, the tower shadow, the wind shear and other space influence factors of the wind power plant in a time domain, and the influence of various space influence factors and the wind power generation set pitch angle controllers on the wind power plant energy transformation function is accurately metered in the equivalent model obtained through measured data in a frequency spectrum mode.

Description

technical field [0001] The invention relates to the field of power system modeling, in particular to an equivalent modeling method for wind farms that can take into account various spatial influencing factors. Background technique [0002] Due to the intermittent and random nature of wind energy, the centralized access of large-scale wind power has brought various safety and stability and operation control issues to the power system, mainly including scheduling, peak regulation and backup, power quality, transient and dynamic stability, etc. In this series of problems, except for the transient stability problem where the wind speed change is not considered due to the short observation time, the rest of the problems need to take into account the fluctuation of wind power. The generation of wind power is the result of the joint action of wind and wind farms, and the fluctuation characteristics of wind power are determined by the two. Therefore, to obtain accurate wind farm po...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q50/06
Inventor 金宇清鞠平吴峰凌峰黄俊辉王海潜潘学萍谢珍建谈健王哲周洪伟乔黎伟
Owner HOHAI UNIV
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