Electric stepless speed change double power flow wind-power generator group

Abstract

The invention relates to an electric stepless speed-variable dual-power wind generator, wherein the electric stepless speed changer (2) comprises a stator (2.1), an outer rotor (2.2), an inner rotor (2.3), and a sliding ring (2.4). The wind turbine (1) via an input axle (6) is connected with the rotor (2.3), the sliding ring (2.4) is mounted on the axle (6), the circumference of the rotor (2.3) is disposed with the rotor (2.2), the circumference of the rotor (2.2) is disposed with the stator (2.1) which via an output axle (7) is connected to a generator (3), the rotor (2.3) is disposed with a multi-phase winding to connect a first power converter (5) via the sliding ring (2.4) and an electric brush, the stator (2.1) is arranged with a multi-phase winding and connected with a second power converter (4), the first and second power converters (4, 5) are connected with one direct-current power.

Description

technical field [0001] The invention is a function that can steplessly adjust the rotating speed of a generator so that the rotating speed of the wind-driven generator does not change with the change of the wind speed, and realizes the output of variable wind speed and constant frequency, and belongs to the technical field of wind-driven generator manufacturing. Background technique [0002] As the whole society continues to pay attention to energy and environmental issues, the development and utilization of renewable energy is showing a trend of accelerated development. Wind energy exists widely on the earth and is currently one of the most mature renewable energy technologies that people have mastered. . A wind turbine is a device that converts mechanical energy into electrical energy in a wind power generation system. It is a tool that connects the prime mover with the output electrical energy. It not only directly affects the quality and efficiency of the output electric...

AI Technical Summary

Problems solved by technology

However, since the direct drive generator works at a low speed of tens of revolutions per minute, in order to ensure that its output voltage is within the normal frequency range (30-80Hz), the generator needs to adopt a larger diameter of the stator and rotor and more poles. Logarithmic, adding difficulty to the design and manufacture of generators

On the other hand, wind energy has randomness, fluctuating from big to small. In the current wind power generation system, when the wind speed is lower than the rated wind speed, the wind wheel can absorb wind energy to the maximum extent, and when the wind speed is higher than a certain limit, in order to maintain power generation The output frequency of the machine is basically constant, and the wind rotor is stalled by adjusting the pitch of the blades, so that the wind energy cannot be fully utilized

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