Mass-adjustable wave energy power generating device of energy catching mechanism and control method of mass-adjustable wave energy power generating device

Abstract

The invention discloses a mass-adjustable wave energy power generating device of an energy catching mechanism. The mass-adjustable wave energy power generating device comprises a pedestal, a wave energy conversion device PTO, an oscillating floating body energy-catching mechanism, a water supply source and a control system, wherein the lower end of the wave energy conversion device PTO is fixedlyconnected to the pedestal; the lower end of the oscillating floating body energy-catching mechanism is fixedly connected to the upper end of the wave energy conversion device PTO; the water supply source is connected to the oscillating floating body energy-catching mechanism; the control system is at least used for acquiring wave frequency and calculating inherent frequency of the oscillating floating body energy-catching mechanism; a mass regulating device is arranged in the oscillating floating body energy-catching mechanism; the water supply source is connected to the mass regulating devicefor conveying seawater into the oscillating floating body energy-catching mechanism; the control system compares wave frequency with inherent frequency of the oscillating floating body energy-catching mechanism, and controls seawater to enter and exist the oscillating floating body energy-catching mechanism to change mass of the oscillating floating body energy-catching mechanism, so that inherent frequency of the oscillating floating body energy-catching mechanism is changed. Mass of the oscillating floating body energy-catching mechanism is regulated through seawater, so that inherent frequency of the oscillating floating body energy-catching mechanism is changed to be matched with frequency of excited wave, and therefore, energy catching of the wave energy device is improved.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a wave energy power generation device with an adjustable energy harvesting mechanism and a control method thereof. Background technique [0002] Due to the huge reserves of wave energy, it has a very broad potential for development and utilization. Since the 1960s, many related researches have been carried out one after another. So far, according to the statistics of the European Ocean Energy Center, different types of wave energy devices can be divided into 9 categories with a total of more than 200 types. Most of the wave energy devices capture wave energy through the oscillation motion of rigid floating bodies. For this type of wave energy device with rigid floating body oscillating motion, the energy-harvesting mechanism is the first stage link, and its motion response has a direct impact on the energy-harvesting effect. In order to obtain a better respo...

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Problems solved by technology

[0003] At present, in normal sea conditions, the excitation wave changes in a wide frequency range, but the natural frequency of the general wave energy device is fixed, and it can only have a relatively good motion response in a narrow frequency range. less effective

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