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Wind power plant probability output power calculation method considering complex wake effect model

A wake effect, output power technology, applied in computing, electrical digital data processing, special data processing applications, etc.

Active Publication Date: 2013-04-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, when establishing the power output model of wind farms, most researchers only consider the simple wake effect model; when establishing the reliability model of wind farms, only the failure rate of wind turbines is involved

Method used

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  • Wind power plant probability output power calculation method considering complex wake effect model
  • Wind power plant probability output power calculation method considering complex wake effect model
  • Wind power plant probability output power calculation method considering complex wake effect model

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Embodiment 1

[0059] Embodiment 1 is an illustration of the principle of the present invention. figure 1 is a flow chart of the calculation method of the probabilistic output power of wind farms considering the complex wake effect model, as shown in figure 1 Shown, the method provided by the invention comprises:

[0060] Step 1: Initialize parameters, including wind turbine coordinates, wind turbine rotor radius r 0 , the rated power P of the wind turbine r , the cut-in wind speed v of the wind turbine ci , the cut-out wind speed v of the wind turbine co , the rated wind speed v of the wind turbine r , the scale parameter c of the Weibull distribution of the wind speed of the wind farm, the shape parameter k of the Weibull distribution of the wind speed of the wind farm, the wind direction rose diagram of the wind farm, the failure rate λ and the repair time μ of the wind turbine and connecting cables.

[0061] Step 2: Establish the wake effect model of the wind farm.

[0062] When th...

Embodiment 2

[0121] Embodiment 2 illustrates the implementation process of the present invention in conjunction with actual data. like image 3 As shown, the wind farm contains 80 wind turbines, and the data next to the wind turbines is the relative wind turbine height based on the wind measuring tower. Assume that the internal electrical wiring of the wind farm is in the form of a chain, and the 10kV busbar is located on the left side of the wind farm (see Figure 4 ), image 3 Corresponding to the first row of wind turbines in Figure 4 Among them are 1#~10# wind turbines, and the corresponding cables are also 1#~10#, and so on; the specific parameters of the wind turbines are: the radius of the wind turbine r 0 =45m, cut-in wind speed v ci =3m / s, cut out wind speed v co =25m / s, rated wind speed v r =12m / s, rated power P r = 2MW, hub height h = 60m; the Weibull distribution parameters c and k of the monthly wind speed of the wind farm are shown in Table 1, and the wind power rose ...

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Abstract

The invention discloses a wind power plant probability output power calculation method considering a complex wake effect model in the technical field of the wind power plant output power control. The wind power plant probability output power calculation method comprises the following steps of: initializing a parameter; establishing a wind power plant wake effect model; initializing a simulated age limit n; obtaining the operation state curve of each wind power generation set and a connection cable of the wind power plant with a sequential Monte Carlo simulation method; within the simulated age limit n, respectively simulating the wind speed and the wind direction by Weibull distribution and a wind rose to obtain the wind speed and the wind direction sequence of the wind power plant with the scale of M; meanwhile, initializing time t; according to the wind speed and the wind direction of the wind power plant at each moment, calculating the output power of non-failure wind power generation set of the wind power plant at a corresponding time moment so as to calculate the total output power of the wind power plant; and with a clustering method, processing the total output power sequence of the wind power plant so as to obtain a wind power plant probability output power curve. According to the wind power plant probability output power calculation method disclosed by the invention, the precision of the wind power plant output power model is effectively improved, and the accuracy of the wind power plant probability output model is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wind farm output power control, and in particular relates to a wind farm probabilistic output power calculation method taking into account complex wake effect models. Background technique [0002] Due to the international energy crisis, the exacerbation of environmental problems, the development of wind power technology and the incentives of government departments, wind power has grown rapidly in the past few years. Due to the randomness, fluctuation and uncontrollability of wind speed, the output power fluctuation range of wind farms is usually large and the speed is fast, which makes large-scale wind power grid integration will bring difficulties in grid peak regulation, reactive power control and voltage control. , Seriously affecting the security, stability and normal dispatch of the power grid. Therefore, how to grasp the changing law of such power sources and establish a model that is more in line ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCY02B10/30
Inventor 刘文霞仇国兵徐继凯张建华
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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