Method for tracing maximum power point of switch reluctance motor wind power generation system

Abstract

The invention discloses a method for tracing the maximum power point of a switch reluctance motor wind power generation system. According to the method, sudden change of wind speed can be judged without a wind speed detection device, a complex control algorithm is not involved, and spot operation is convenient. Based on a perturbation and observation method, the method traces and controls the maximum power point of the system by a proper perturbation step length when the wind speed changes suddenly, the problem that lock-rotor of an electric generator happens due to the fact that exciting current is out of tone when the wind speed suddenly drops is solved, and operation stability of the switch reluctance motor wind power generation system is guaranteed. The wind power generation system mainly is composed of a wind turbine, a gearbox, a power converter, a bus capacitor, a DC power supply, a DC load, a controller, a switch reluctance motor, a signal filter device and a signal detection device. The output signal filter device is added to the DC bus side of the switch reluctance motor wind power generation system, so that the oscillation amplitude of output power is reduced, and rapidity of tracing of the maximum power point is improved.

Description

Technical field [0001] The invention belongs to the field of wind power generation, and relates to a method for realizing the maximum power point tracking of a switched reluctance motor wind power generation system, and is suitable for a switched reluctance motor wind power generation system without a wind speed detection device. Background technique [0002] With the depletion of energy and the deterioration of the environment, new energy sources such as wind energy and solar energy are showing a rapid development trend. Among them, wind energy is becoming more and more important in the field of power generation due to its advantages of renewable and cleanness. [0003] At present, the generators commonly used in the field of wind power generation include permanent magnet generators, ordinary induction generators and doubly-fed generators. The shortcomings of these types of conventional generators in practical applications are: permanent magnet generators are very expensive to man...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in the switched reluctance motor wind power generation system, based on the principle of improving the speed and stability of the power generation system adjustment, and aiming at the difficulty in realizing the maximum power point tracking control when the wind speed changes suddenly, a The method of judging the sudden change of wind speed without wind speed detection device can ensure the stability of power generation system operation

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