Wind electricity generator set control method capable of adapting to air density changes

A technology of generator control and air density, which is applied in the direction of wind power generation, wind engine, wind engine control, etc. It can solve the problems affecting the power control and electric energy output of wind turbines, and the inability to achieve optimal operation, and achieve the maximum power output. Effect

Inactive Publication Date: 2015-07-01
SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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Problems solved by technology

Although some wind farms will make fine adjustments to the optimal control curve according to the actual operation of the wind turbines and the measured environmental data during the grid-connected commissioning, but even in the same wind farm,

Method used

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with specific embodiments.

[0015] During the operation of the wind turbine, the actual air density at the height of the center of the hub of the wind turbine is calculated based on the altitude of the wind farm area, the height of the hub of the fan, and the measured ambient temperature t outside the cabin .

[0016] by actual air density , calculate the torque correction coefficient K relative to the standard air density.

[0017] Correct the actual generator control torque T, the calculation formula is T=K× ,in It is the standard generator control torque at the time of design. By correcting the actual motor control torque T, it affects the speed of the wind rotor, so that the unit can always maintain the optimal tip speed ratio operation under different air densities. Achieve maximum wind energy capture and achieve maximum power output.

[0018] In the present invention, a method fo...

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Abstract

The invention relates to an optimal control method capable of adapting to air density changes of the environment of a wind generator set. The method comprises the following steps that according to the altitude of a wind field area, the height of a fan hub and actually-measured environment temperature outside a cabin, actual air density of the height of the center of a hub of a wind generation set is calculated, and according to calculated torque correction coefficients relative to the standard air density, an actual generator control torque is corrected, and therefore the rotating of a wind wheel is affected, and the set can be always maintained in the optimum tip-speed ratio to run under the different air density conditions; and the problem that a fan runs under the non-standard air density and deviates from the optimum control curve is solved, the maximum electricity generating efficiency output can be dynamically obtained in real time, and the adaptation of the wind generator set to different environments of different areas is improved.

Description

technical field [0001] The present invention relates to an optimal control method for adapting to changes in the air density of the environment where the wind power generating set is located. Background technique [0002] The magnitude of wind energy is mainly determined by wind speed and air density, but at present, the optimal control curve is calculated according to the standard air density in the design stage of wind turbines, so its control is mainly aimed at the change of wind speed, without considering the change of air density. Once the designed model is applied in a non-standard air density, the actual operation of the unit will deviate from the optimal control curve, and the optimal power generation efficiency cannot be obtained. [0003] Due to the influence of geographical conditions and environment, the air density of different wind farms is different. Although some wind farms will make fine adjustments to the optimal control curve according to the actual opera...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/028Y02E10/72
Inventor 楚峥王力雨王海刚李楠
Owner SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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