An Indirect Speed ​​Control Method Based on Width Learning

Abstract

The invention discloses an indirect speed control method based on width learning. Obtain the effective wind speed information of the unit within a certain period of time, use mutual information to select the unit output data related to the effective wind speed in the corresponding time period, remove the correlation in the obtained unit output data and perform normalization operations, and construct a width learning system The training set is used to determine the structure and parameters of the width learning system, and obtain the wind speed estimation model. The model gives the effective wind speed value online, and then calculates the speed tracking error and the indirect speed control expression. This method retains the advantages of the simple structure of the traditional indirect speed control algorithm, overcomes the shortcomings of its slow convergence speed, can accelerate the acceleration and deceleration performance of the unit at the same time, and improve the efficiency of wind energy capture. It is simple and easy to implement, and the implementation cost is low. With fewer parameters, compared with the traditional indirect speed control algorithm, it can increase the production capacity of the unit and increase the benefit of the wind farm.

Description

technical field [0001] The invention relates to the technical field of wind power generator control, in particular to an indirect rotational speed control method based on width learning. Background technique [0002] In the past few decades, wind power has developed rapidly all over the world. The wind in nature has strong randomness and indirectness, resulting in great unpredictability and volatility of wind power. "Wind curtailment" is common in the wind power industry. Therefore, the commercial value of wind power needs to be further developed. Lift and dig. [0003] Maximum wind energy capture is one of the main control objectives of wind turbines and an important guarantee for the maximum economic benefits of wind farms. In order to achieve this goal, the indirect speed control algorithm is generally used in the industry. The principle of this algorithm is very simple, that is, assuming When the wind speed is a constant value, only the steady state of the system is co...

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Problems solved by technology

[0006] In order to improve the wind energy capture efficiency of the indirect speed control algorithm and solve the problems of high implementation cost and difficult parameter selection of existing indirect speed control methods, the present invention provides an indirect speed control method with low implementation cost and simple control parameter debugging, which can reduce wind power The construction and operation and maintenance costs of the wind farm, while accelerating the acceleration and deceleration performance of the wind turbine, increasing the production capacity of the wind turbine, and increasing the economic benefits of the wind farm

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