Model selection and optimization method for fan blade in wind power plant

Abstract

The invention relates to a model selection and optimization method for a fan blade in a wind power plant. A simple and convenient multi-wind-direction wake flow calculation method is provided; the relative position relationship of fans can be obtained through conversion of rectangular coordinates and polar coordinates, so that the wake flow can be calculated; the wind speeds of various fan unit are calculated according to a wake flow effect formula; the generated energy at the corresponding wind speed is obtained according to an active output model of the fans; the practical power output of the various fan units is obtained through an interpolation method; the target is the lowest full-life-cycle KWH cost of the wind power plant; on the premise of sufficiently considering the wake flow effect among the wind speed distribution, the wind direction distribution and the units of the wind power plant, optimal selection of the blade lengths of the various fans in the wind power plant is carried out; and the optimization problem is solved through a genetic algorithm. On the premise that the installation capacity of the wind power plant is not changed, the benefit of the wind power plant is increased; the KWH cost is reduced; and guidance is provided for model selection of a wind power unit in the wind power plant planning stage.

Description

technical field [0001] The invention relates to a wind power generation technology, in particular to a type selection optimization method for fan blades of a wind farm. Background technique [0002] With the rapid development of wind power technology, wind power has become the third largest power source after thermal power and hydropower. By 2020, my country's wind power installed capacity is expected to reach 200GW. The rapid development of wind power technology and the fierce competition of resources make the cost of electricity become one of the important indicators for the development of wind power industry. [0003] The cost per unit of electricity depends on the total cost and the amount of electricity generated. The power generation of a wind farm is determined by the amount of energy absorbed by the wind turbine from the wind. Among them, the blades of the fan are the key components for the fan to convert wind energy. Under the same capacity conditions, the length ...

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Problems solved by technology

However, the above studies are all carried out on the basis that the fans in the wind farm belong to the same model and the blade length is the same, and there are few studies on the selection and optimization of the blade length of the wind farm fan.

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