Control method and control device for vertical-axis wind generating set

Abstract

The embodiment of the invention discloses a control method and a control device for a vertical-axis wind generating set, which are used for realizing power control to the vertical-axis wind generating set, and have strong practicability and universality. The control method provided by the embodiment of the invention comprises the following steps: acquiring the wind speed of ambient environment of the vertical-axis wind generating set and a wind wheel rotating speed of the vertical-axis wind generating set; judging whether the wind speed is greater than the rated wind speed or not, and if the wind speed is less than the rated wind speed, calculating the first tip speed ratio via the wind speed, the wind wheel rotating speed and the wind wheel rotating radius; performing modification according to the comparison between the optimal tip speed ratio and the first tip speed ratio, so as to obtain the second tip speed ratio; calculating the rotor power coefficient via the second tip speed ratio; calculating the mechanical power generated by the vertical-axis wind generating set according to the rotor power coefficient, the rotor swept area, the wind speed and the air density of the ambient environment of the vertical-axis wind generating set; and issuing the mechanical power to a converter, and controlling the electromagnetic torque of a synchronous generator through the converter, so as to adjust the rotating speed of the synchronous generator.

Description

technical field [0001] The present invention relates to the technical field of wind power generation control, in particular to a control method and device for a vertical axis wind power generating set. Background technique [0002] Compared with horizontal axis wind turbines, vertical axis wind turbines have been gradually re-recognized and valued by people because of their advanced design methods, high wind energy utilization rate, low start-up wind speed, and basically no noise, etc., and have a wide range of market applications. prospect. At present, the development technology of vertical axis wind turbines is still immature, and usually focuses on the development of the structure of vertical axis wind turbines, but the development of control technology for vertical axis wind turbines is still relatively small. [0003] Next, a control method for vertical axis wind turbines in the prior art will be introduced. This control method is to realize the maximum power control ...

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Problems solved by technology

[0004] In the process of realizing the control method of the present invention, the inventor of the present invention found that the existing control method has at least the following technical defects: the data n, v, and p in the corresponding relationship curve provided by the wind power generator factory are discrete It needs to establish a multi-dimensional array and store it, so the amount of data generated is very large, and the power value corresponding to a certain speed or wind speed obtained through the query table is not the maximum power reference value, and it is not practical. Strong; for different models of wind turbines, the corresponding relationship curves of speed and power or wind speed and power are also different, and the multidimensional array still needs to be reassigned, so the existing control method cannot be used universally for all models, and the compatibility is relatively low. Difference

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