A method for evaluating the power generation of micro-site selection based on the equivalent wind speed of the wind rotor face

Abstract

A microcosmic site selection power generation evaluation method based on the equivalent wind speed of the wind rotor surface, comprising the following steps: a) calculating the wind shear at each wind turbine location in the wind farm: calculating the wind shear at each wind farm location , a set of CFD simulation calculation method is established according to the air flow theory of the wind farm, and at the same time combined with the measured data of the anemometer tower, the wind shear at each machine location of the wind farm can be calculated more accurately; b) Considering the wind shear at each wind turbine location Assess the power generation of wind farms: when evaluating the power generation of wind farms, convert the conventional dynamic power curve into the dynamic power curve represented by REWS; according to the concept of REWS, point wind Shear calculation REWS; according to the dynamic power curve based on REWS, REWS and Weibull distribution, evaluate the power generation of each wind turbine and wind farm. The invention has high result precision, practical theory, simple calculation flow and high efficiency.

Description

technical field [0001] The invention relates to the technical field of micro-site selection of wind farms, in particular to a micro-site power generation evaluation method based on the equivalent wind speed of a wind rotor surface. Background technique [0002] The microcosmic site selection and power generation evaluation is the core link of wind farm development, and plays an important role in the success or failure of wind farm efficiency and wind farm investment. As my country's wind power on-grid electricity price has been reduced year by year, and the development of wind farms has gradually shifted to the southeast mountainous areas with low wind speed and complex terrain, the profit and loss of wind farms have almost reached the balance point, so more stringent requirements have been put forward for the accuracy of power generation evaluation methods . [0003] The current power generation evaluation method is mainly calculated by Hub Height Wind Speed ​​(HHWS), wind ...

AI Technical Summary

Problems solved by technology

However, due to the influence of terrain and thermal changes, the actual wind shear of wind farms is usually variable and does not conform to the exponential law

In addition, the current dynamic power curve is defined by the wind speed at the hub height, and the wind speed at the hub height cannot represent the wind speed variation of the entire wind rotor surface, so the dynamic power curve and annual power generation calculated by the current method are compared with the actual situation There is a big difference

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