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Wind turbines input wind speed equivalent method taking into account influence of wind direction

A wind turbine and wind direction technology, applied in wind power generation, wind engine, wind engine control, etc., can solve problems affecting the accuracy of wind farm research

Inactive Publication Date: 2010-06-09
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0017] In the current research on wind power generation at home and abroad, generally only the influence of wind speed is considered to establish a wind farm model for wind power grid-connected research, which may affect the accuracy of related research on wind farms. The model is very necessary and practical

Method used

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  • Wind turbines input wind speed equivalent method taking into account influence of wind direction
  • Wind turbines input wind speed equivalent method taking into account influence of wind direction
  • Wind turbines input wind speed equivalent method taking into account influence of wind direction

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Embodiment Construction

[0056] Specific implementation plan

[0057] Hereinafter, the present invention will be further described with the use of drawings and implementation examples.

[0058] The wind turbine input wind speed equivalent method considering the influence of the wind direction proposed by the present invention is used to solve the problem that the traditional wind turbine input wind speed model only considering the influence of the wind speed can not be processed to study the output characteristics of the wind farm. The specific implementation plan is as follows:

[0059] 1. Take the wind speed and wind direction data of the wind turbine at an interval of 10 minutes, such as figure 1 As shown, the samples are grouped according to the grouping method;

[0060] 2. Perform average processing on each group of samples.

[0061] 3. Calculate Markov transition probability matrix P and cumulative probability matrix P c .

[0062] P=0.192050.38570.0130.00160.080.01490.00490.00490.37580.17840.46460.0180...

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Abstract

The invention discloses a wind turbines input wind speed equivalent method taking into account the influence of wind direction, the method takes into account time-space correlations of wind speed and wind direction, and establishes an equivalent wind-input model of wind turbines. The technical scheme comprises the following steps of: grouping samples according to the mutability of wind speed and wind direction; establishing a synthesized wind speed model taking into account the influence of wind direction in each group of samples; modulating the synthesized wind speed model in each group by using the Markov chain to form wind speed time series; computing the output power of the wind turbines by adopting the synthesized wind speed model taking into account the influence of wind direction and a traditional wind speed model, and then comparing with the observed value of the output power of the wind turbines, thereby verifying the rationality of the method. The synthesized wind speed time series obtained by this method is not only helpful to evaluate the dynamic characteristics of a synchronized wind farm and the influence on power grid operation, but also reasonably arranges a production plan for the power grid dispatching department, and reduces system reserve capacity so as to provide accurate wind power data.

Description

Technical field [0001] The invention relates to a method for modeling wind speed, in particular to a method for modeling input wind speed of a wind power generating unit for grid connection analysis of a wind farm. Background technique [0002] Wind power generation is an energy conversion method that converts wind energy into electrical energy through wind turbines. Wind is the source of power for wind turbines. Due to the natural characteristics of wind, such as randomness, intermittency, volatility, and uncontrollability, random fluctuations in the output power of wind turbines are caused. Such fluctuations will have a certain degree of impact on the wind turbine itself and the power system connected to it. influences. With the rapid development of wind power generation in my country in recent years, research and evaluation of wind farm integration into the power system, and research on the ability of systems and key nodes to accept wind power are important issues that urgent...

Claims

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Application Information

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IPC IPC(8): G06F19/00F03D7/00
CPCY02E10/723Y02E10/72Y02P70/50
Inventor 曹娜于群
Owner SHANDONG UNIV OF SCI & TECH
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