Capture method and device for wave power generation system maximum output active power

Abstract

The invention provides a capture method for wave power generation system maximum output active power. The method comprises the steps that the motion state of a wave power generation system is subjected to frequency domain analysis, it is concluded that the output active power of the wave power generation system is related to a two-dimensional variable set [Rg, Kg], and Rg is resistance in electric generator equivalent impedance; Kg is capacitance in the motor equivalent impedance; according to the mathematic relation of the output active power of the wave power generation system and the two-dimensional variable set [Rg, Kg], a relation curve graph is drawn, different disturbance step sizes are set by zone according to the slope of points on the curve in the relation curve graph, alternate disturbance is applied to two dimensions of Rg and Kg on the basis of a variable step size perturbation and observation method to constantly and rapidly seek the maximum output active power operation point of the wave power generation system, and on the condition that no accurate parameters of the wave power generation system are known, equivalent impedance of the wave power generation system is adjusted, and therefore the wave power generation system can capture the maximum output active power all the time.

Description

Technical field [0001] The invention relates to the field of wave energy power generation, and more specifically, to a method and device for capturing the maximum output active power of a wave energy power generation system. Background technique [0002] The ever-increasing demand for energy and increasingly severe environmental problems have shifted people’s attention from traditional energy sources to clean and renewable energy sources. Compared with clean and renewable energy such as wind and solar energy, which has the disadvantage of greater randomness with weather changes, wave energy is favored because of its small change per unit hour, high energy density and good predictability. How to maximize capture Wave energy has become the focus of research on wave power generation. [0003] The wave power system has its own natural frequency. When the wave frequency matches the frequency of the wave power system, the two will resonate. At this time, the wave power system can absorb...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a method and device for capturing the maximum output active power of a wave energy generation system to solve the problem that the existing technical solutions cannot effectively obtain the maximum output active power of the wave energy generation system

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