Variable-speed wind generating set maximum wind energy capturing method based on effective wind speed estimation

Abstract

The invention discloses a variable-speed wind generating set maximum wind energy capturing method based on effective wind speed estimation. The method comprises an effective wind speed estimating model and a maximum wind energy capturing controller. In order to acquire an effective wind speed estimated value, a training set of an SVR model is formed by normalized unit historical output data and historical wind speed measured values, penalty parameters and kernel function parameters are selected by a GA algorithm to obtain the trained SVR model, and the model gives out the wind speed estimatedvalue in an online manner; and when the maximum wind energy capturing controller is design, the real-time optimal wind wheel rotating speed estimated value is obtained according to effective wind speed which is given out by the effective wind speed estimating model, nonlinear characteristics and parameter uncertainty of the system are responded by robust factors and a neural network, and therefore, boundedness of rotating speed tracking errors and stability of a wind generating set system are realized. By the method, a mathematical model and parameters of the unit do not require to be used, adesign process is simple, an implementing cost is low, and the capacity of the unit and the economic benefit of a wind power plant can be improved.

Description

technical field

[0001] The invention relates to the technical field of control of variable-speed wind power generators, in particular to the maximum wind energy capture control of variable-speed wind power generators. Background technique

[0002] With the development of human society, energy shortage and environmental crisis have become increasingly serious. As the most widely used new energy power generation method, wind power is an important means to solve energy and environmental crises. In recent years, wind power has developed very rapidly. According to a report issued by the World Wind Energy Association (IEA), by 2050, the global wind power penetration rate will reach 15-18%. Generally speaking, wind turbines can be divided into fixed-speed wind turbines and variable-speed wind turbines. Compared with fixed-speed wind turbines, variable-speed wind turbines have higher power generation efficiency and lower structural loads. Therefore, in the current wind power marke...

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