Power converter for wind turbine with real-time power generation and full-time grid connection function

Abstract

The invention discloses a draught fan electric power converter with the real-time electricity generating and full-time grid connecting functions. The draught fan electric power converter comprises a draught fan electric power converter body. The electric power converter body is electrically connected with a draught fan and a power grid connected with the electric power converter body in a lapped mode, and the electric power converter body is connected with the power grid in parallel all the time. After the draught fan rotates windward and generates power, the energy produced by the draught fan can be converted into alternating voltage with the level same as the voltage of the power grid through the draught fan electric power converter body, and the produced energy is transmitted to the power grid through the alternating voltage output through the electric power converter body. The draught fan electric power converter body is connected with the power grid in parallel in the lapped mode all the day, the electric energy produced by the draught fan can be converted by the electric power converter body in real time and transmitted to the power grid.

Description

technical field [0001] The invention relates to a power converter for a fan, in particular to a power converter for a fan with the functions of real-time power generation and full-time grid connection. Background technique [0002] In response to concepts such as environmental protection and energy saving, renewable energy is widely and widely used all over the world. Since renewable energy is not as capable of outputting a large amount of stable and usable energy as thermal power and nuclear energy, climate accounts for a large part of the factor when using renewable energy. For example, solar resources have cloudy and sunny days, high or low temperature, etc., which will affect the power generation efficiency, while wind resources have uncertain factors such as strong and weak winds and turbulent winds. Therefore, the converters used in renewable energy must have special mechanisms in order to be used efficiently. Unstable renewable energy. [0003] Due to the highly unst...

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Problems solved by technology

Or use the energy of the battery device to supply power to the subsequent circuit. The battery device is charged by the mains network through a bidirectional converter, and then supplies power to the AC load through the bidirectional converter. It can be applied to uninterruptible power systems and solar energy converter architectures , this type of wind power converter will shut down when there is no wind. When the wind starts to drive the generator, the generator must generate AC power higher than a certain voltage level and then rectify it into DC power to drive this type of power converter. , after driving the power converter, it is necessary to wait for a period of time for the power converter to be connected to the grid before the electric energy generated by the fan can be sent to the grid; Weaken the shutdown of the wind turbine. When the wind turbine is shut down, the power converter is bound to enter the shutdown state again and wait for the next wind blowing; from the perspective of wind resource application, this type of power converter cannot maximize the energy generated by the wind turbine. In the long run, it is not in line with the benefits of wind resources application

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