Wind turbine layout method for capturing low-altitude wind energy in existing wind farms

Abstract

The invention relates to a method for arranging wind turbines to capture low-altitude wind energy in an existing wind field, which includes the following steps: 1) determining the arrangement of large-scale horizontal-axis wind turbines in the existing wind field and the arrangement of wind turbines perpendicular to the dominant wind direction and parallel to the dominant wind direction; 2) Select a pair of reverse near-earth vertical axis fans whose impeller diameter and overall height are respectively smaller than the impeller diameter and tower height of the large horizontal axis fan; 3) According to step 1), select two adjacent rows of large At least one row of reversed near-ground vertical-axis fans is arranged between the horizontal-axis fans, and the plane points of the front paired reverse-closed vertical-axis fans are in the speed-up area caused by the adjacent front row of large horizontal-axis fans 4) According to step 1), determine the spacing of each fan parallel to the prevailing wind direction. The present invention makes it possible to effectively capture the existing wind field no matter in the existing wind field arranged in a staggered arrangement or flush arrangement, by arranging pairs of reverse near-earth vertical axis wind turbines of appropriate size at appropriate positions It is theoretically estimated that the energy output of existing wind farms can be increased by more than 25% to 50%.

Description

technical field [0001] The invention relates to a fan arrangement method, in particular to a fan arrangement method for capturing low-altitude wind energy in an existing wind field, and belongs to the field of wind farm design. Background technique [0002] In the past 10 years, the development of wind power in China has advanced by leaps and bounds, with an average annual growth rate of more than 50%. By the end of 2013, the cumulative installed capacity reached 91.4GW (322GW in the world), ranking first in the world. However, on the one hand, the development of high-quality onshore wind resources has been basically completed, and the remaining resources are mostly located in remote areas and high mountains with extremely high development costs; on the other hand, the utilization rate of wind energy in existing onshore wind farms is less than 10%. Wind energy at low and medium altitudes has not been effectively developed. [0003] For high-altitude wind energy, large-scal...

AI Technical Summary

Problems solved by technology

However, compared with large-scale horizontal-axis fans, the wake characteristics of small and medium-sized horizontal-axis fans have not been significantly improved, so the impeller diameter of small and medium-sized horizontal-axis fans can only be reduced to ensure that it does not affect the normal operation of large-scale horizontal-axis fans. Too much interference is generated, so when the wind field is arranged, the diameter of the impeller of the small and medium-sized horizontal axis fan is usually less than half of the diameter of the impeller of the large horizontal axis fan, and its wind energy utilization efficiency is greatly reduced

On the other hand, in order to capture incoming wind from different directions, small and medium-sized horizontal axis fans also need to be equipped with a wind-facing device, the system is complex and the investment cost is high

Therefore, although small and medium-sized vertical axis wind turbines can capture wind energy at low and medium altitudes, it is not a simple, efficient, and economical solution

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