Multi-fan array annual energy production improving method based on wake flow field optimization control

A technology of optimal control and multiple wind turbines, applied in wind power generation, wind turbines that are consistent with the wind direction, wind turbines, etc., and can solve problems such as difficulty in achieving optimal power in wind farms

Active Publication Date: 2020-12-18
北京华信科创科技有限公司
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Problems solved by technology

However, due to the influence of the wake effect in the wind farm, this

Method used

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  • Multi-fan array annual energy production improving method based on wake flow field optimization control
  • Multi-fan array annual energy production improving method based on wake flow field optimization control
  • Multi-fan array annual energy production improving method based on wake flow field optimization control

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Embodiment

[0268] In order to verify the effectiveness of the solution of the present invention, the following simulation experiment is carried out on the fan array of a certain wind farm. The fan array is composed of five fans numbered A02, A03, A04, A05, and A06. When the inflow wind direction is 35°, fan A02 is the first fan; when the inflow wind direction is 215°, fan A06 is the first fan. Fans; the distances between fans A02, A03, A04, A05, and A06 are 383m, 316m, 314m, and 381m respectively; the power utilization coefficient of the five fans is 0.585, the lift coefficient is 0.9, and the radius of the wind rotor is 51.5m , the distance between the radar wind measuring point and the radar is 80m, the angle between the laser emitted by the radar and the central axis of the wind turbine is 30°, and the wake attenuation coefficient is 0.075.

[0269] The yaw error angle of the downstream fan A04 after compensation is as follows: Figure 5 As shown, it can be seen that the corrected ya...

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Abstract

The invention discloses a multi-fan array annual energy production improving method based on wake flow field optimization control. The multi-fan array annual energy production improving method comprises the following steps of calculating a wake flow radius of a section position where a wind measurement point of a second fan radar is located in a first fan wake flow region, judging the position ofthe wind measurement point of the second fan radar in the first fan wake flow region, and calculating compensation coefficients of the measured wind speeds of the left and right wind measuring pointsof the second fan radar and the compensated yaw error angle of the second fan; calculating yaw error angles of all fans of the wind field array after compensation; calculating the wake flow radiuses of the section positions of wind wheel planes of the fans in different upstream fan wake flow regions, calculating the average wind speed of the fans in the different upstream fan wake flow regions, and calculating the sum of power output of the fan array; and calculating the active yaw angle of each fan corresponding to the maximum sum of the fan array power in real time by using a genetic algorithm, and optimizing and controlling the yaw state of the fans. According to the multi-fan array annual energy production improving method, the optimal power of the whole wind power plant is taken as the target, and the power generation benefit of the wind power plant is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of fan control, and in particular relates to a method for increasing the annual power generation of a plurality of fan arrays based on wake field optimization control. Background technique [0002] As an abundant and clean new energy, wind energy is one of the most promising renewable energy sources in the world. With the increase of grid transmission and accommodation capacity, wind farm owners pay more attention to the improvement of wind turbine power generation efficiency. The wake of the upstream fan will significantly reduce the power output of the downstream fan. Therefore, the optimization strategy of wind farm control for the wake effect is of great significance for improving the overall power generation efficiency of the wind farm. At present, most of the existing wind turbine yaw control strategies aim at zero yaw error angle of the wind turbine. However, due to the influence of the wake effect ...

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Application Information

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IPC IPC(8): F03D17/00F03D80/00F03D7/04F03D7/02F03D1/02
CPCF03D1/02F03D7/0204F03D7/043F03D17/00F03D80/00Y02E10/72
Inventor 邱颖宁李绪阳冯延晖
Owner 北京华信科创科技有限公司
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