Variable speed constant frequency and energy storage method and device for wind power generation

Abstract

The invention discloses a variable speed constant frequency and energy storage method and a variable speed constant frequency and energy storage device for wind power generation. A control signal is transmitted through a controller to adjust an excitation power supply, a motor side circuit breaker, a grid-connected switching and monitoring device, a power converter, a first clutch and a second clutch and control the working mode of a wind power generation system to fulfill the aims of variable speed constant frequency and flywheel energy storage of the wind power generation. In addition, the variable speed constant frequency and energy storage device for the wind power generation is provided for finishing the functions. According to the method and the device, a mechanical variable frequency transformer is adopted, and a flywheel energy storage device and the power generation system are organically integrated, so that low-voltage ride-through is easy to realize, the hardware structure of the system is simplified, and the efficiency and the reliability are improved.

Description

technical field [0001] The invention relates to a method and device for variable speed constant frequency and energy storage, and is especially suitable for a method and device for variable speed constant frequency and energy storage of wind power generation. Background technique [0002] With the increase of energy demand and the deterioration of the environment, the wind power generation system has been vigorously promoted and applied as a green energy. Because wind energy cannot be controlled, and strong gusts are prone to occur in the wind field, the traditional constant speed and constant frequency wind power generation system has the disadvantages of low utilization rate of wind energy and the mechanical parts of the wind turbine are subject to great impact and are easily damaged. The variable speed constant frequency wind power generation system can overcome the above-mentioned shortcomings, so the variable speed constant frequency wind power generation system is the ...

AI Technical Summary

Problems solved by technology

The currently used variable speed constant frequency wind power generation systems include doubly-fed power generation systems, wind turbines combined with full-power inverter systems. In terms of low voltage ride through ability is weak

In addition, the uncontrollable and sudden change of wind energy makes the wind power generation system have a great impact on the power grid

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