The hydraulic wind turbine generator is mainly composed of hydraulic pump, hydraulic motor and synchronous generator . The working principle is shown in Fig. 2.
Speed control The key to the grid connection control of hydraulic wind turbine generator is to require the synchronous generator to have the same rotational frequency as the grid frequency, and the deviation should usually not exceed 0.4% from the perspective of power grid quality .
Compared with the traditional wind power system, the hydraulic wind turbine has some advantages. First, the bulky gear box can be omitted, and the hydraulic motor and synchronous generator can be flexibly arranged on the ground, thus reducing the weight and volume of the engine room, and improving the safety of the tower.
In order to further promote the application of hydraulic wind turbine, the research and development of high power hydraulic components is particularly important, especially the development of megawatt-level, low-speed, and high-torque hydraulic pump and hydraulic motor.
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