Wind power generation hydraulic coupling control system and control method thereof

Abstract

This invention relates to a wind-generated electricity fluid pressure coupling controlling system, in addition to a controlling method. The controlling system comprises several wind mills (5), gear boxes (6) and generators (17), wherein between the shaft out end of the gear box (6) and the generator (17) it has a hydraulic pump system (1), pressure-limiting system (2), pressure backing-off system (3), constant-current and constant speed system (4) and braking system (4-1); when the rotating number of the wind mill changes with the wind speed, the output voltage and frequency of the generator will be stable, by which the medium-sized wind mill group can constitute large-scale wind-generated electricity system, and its volume can reach to steam generation level; the system end has a pressure compensate system used for ensuring that it has enough torque to output, making the wind mill work long time in its maximum efficiency.

Description

technical field [0001] The invention belongs to a wind power generation control system, in particular to a wind power generation hydraulic coupling control system and a control method. Background technique [0002] At present, although there are many kinds of wind turbines in the world, they can be divided into horizontal axis wind turbines and vertical axis wind turbines. Their main structures are basically the same, consisting of impellers, gearboxes, generators and towers. The working principle is that the impeller converts wind energy into mechanical energy, and then converts mechanical energy into electrical energy. The main problem of the above two wind power generation systems is that the number of revolutions of the wind turbine changes with the change of wind speed, which leads to the output voltage and frequency of the generator. Instability, which is not conducive to the grid-connected operation of generators; the capacity of a single generator is small; maintenan...

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Problems solved by technology

[0002] At present, although there are many kinds of wind turbines in the world, they can be divided into horizontal axis wind turbines and vertical axis wind turbines. Their main structures are basically the same, consisting of impellers, gearboxes, generators and towers. The working principle is that the impeller converts wind energy into mechanical energy, and then converts mechanical energy into electrical energy. The main problem of the above two wind power generation systems is that the number of revolutions of the wind turbine changes with the change of wind speed, which leads to the output voltage and frequency of the generator. Instability, which is not conducive to the grid-connected operation of generators; the capacity of a single generator is small; maintenance is difficult, especially when giant or large wind turbines fail, and the maintenance costs are high. Some large wind turbines cannot be put into use because of this; When the wind speed is too low, the system will stop power generation

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