Energy steady output control system applicable to hydraulic wave power generation device

Abstract

The invention discloses an energy steady output control system applicable to a hydraulic wave power generation device. Firstly, the opening degree of a speed regulating valve is adjusted through voltage and speed dual-loop PID control, the fact that a first level of hydraulic energy output flow is stable is guaranteed, and the situation that output of electric energy of the whole wave power generation device is instable due to instability of the first level of hydraulic energy output flow is avoided; meanwhile, voltage and rotating speed of a power generator are stabilized to be nearby target values; secondly, power which rectifier equipment can output and load-bearing capacity (that is to say load power) of a load device are pre-distributed according to energy which the wave power generation device already absorbs, so that the effect that the already absorbed energy is fully utilized is guaranteed, and meanwhile balance of output energy and a load is achieved; and thirdly, the opening degree of a discharge capacity valve is adjusted according to actual load power, the load-bearing capacity of the wave power generation device is further adjusted, and the optimum match of the already absorbed energy, the output energy and the load is achieved.

Description

technical field [0001] The invention relates to the field of marine wave energy development, in particular to an energy stable output control system suitable for a hydraulic wave energy generating device. Background technique [0002] Wave energy is an important part of ocean energy, its reserves are huge, and its development and utilization have broad prospects. my country is a large ocean country, and the available wave energy resources are extremely rich. The development and utilization of these wave energy resources is one of the important contents of the development and utilization of marine renewable energy in my country. [0003] The main means of wave energy development is wave power generation. The wave power generation device is built on the sea, and the electric energy is transmitted to the shore through the submarine composite cable. Since the wavelength, wave height, and wave cycle are all changing, the energy of waves is unstable and discontinuous. Therefore, ...

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Problems solved by technology

At present, there are various forms of wave power generation devices in China. Some wave power generation devices adopt energy storage and voltage stabilization technology. While capturing and storing energy, they can absorb the instantaneous impact of wave energy and temporarily replenish energy, but wave power generation cannot be guaranteed. The stability of the output voltage of the device and the matching of the output energy of the wave energy generation device with the load

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