Control method based on slip form extreme searching

Abstract

The invention provides a control method based on slip form extreme searching. The control method is applied to control over a wind power generation system to achieve maximum power tracking. The control method comprises the steps that in the current state detection step, the current power and the current rotation speed of a draught fan are detected; in the parameter matching step, a gain parameter value is matched from a pre-constructed parameter table according to the current power and the current rotation speed; in the maximum power tracking step, the gain parameter value is input into a controller, the gain parameter is optimized by adopting the pre-constructed optimization function according to the pre-determined slip form extreme searching range and the pre-constructed target function, accordingly, the optimal gain parameter value is obtained, and the wind power generation system tracks the maximum power. According to the provided control method, the gain parameter value is matched from the pre-constructed parameter table and then is optimized through the optimization function, the wind power generation system tracks the maximum power, the wind power generation system can be controlled in real time, and the response speed is high.

Description

technical field [0001] The invention relates to the technical field of wind power generation control, in particular to a control method based on sliding mode extreme value search. Background technique [0002] The use of fossil energy has caused tremendous pressure on the natural environment. All countries have attached great importance to renewable energy and introduced a series of policies to encourage the development and use of renewable energy, which has promoted the development of wind power technology. [0003] The maximum power tracking of the wind power generation system refers to: when the wind power generation system is running below its rated power, the control system is used to adjust the wind power generation system so that the operating point of the wind power generation system runs near the maximum power point, and then realizes the maximum power. Power capture to take full advantage of wind energy. [0004] The disturbance observation method is a commonly us...

AI Technical Summary

Problems solved by technology

However, the speed disturbance often cannot be responded in an instant, and when the wind speed changes rapidly, it is easy to make the method misjudgment, and the maximum power point cannot be tracked.

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