An Analytical Method for Assessing the Effects of Tower Changes on Flicker of Wind Turbines
A technology of wind turbines and analysis methods, which is applied in the field of wind power generation, and can solve the problems that the flicker characteristic changes of wind turbines cannot be quantitatively analyzed, etc.
Active Publication Date: 2022-05-03
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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Problems solved by technology
[0005] Aiming at the deficiencies in the existing technology, the present invention proposes an analysis method for evaluating the impact of tower changes on the flicker of wind turbines to solve the problem in the prior art that the flicker characteristics of wind turbines change when the height of the wind turbine tower changes Quantitative analysis of the situation cannot be carried out, and the technical problem of the test report must be issued after the on-site measurement
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Embodiment 1
[0052] This embodiment provides an analysis method for evaluating the impact of tower changes on the flicker of wind turbines, including the following steps:
[0053] According to the original value and the change value of the tower height, calculate the percentage change of the tower height;
[0054] Comparing the tower height change percentage with the height change threshold, when the tower height change percentage is less than or equal to the height change threshold, it is determined that the flicker characteristics of the wind turbine have not changed;
[0055] When the tower height change percentage is greater than the height change threshold, calculate the distance difference between the position of the first shadow and the position of the second shadow, compare the distance difference with the distance threshold, and calculate the second shadow minus the first shadow, the second shadow Compare the area difference with the area threshold; when the distance difference is g...
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The present invention provides an analysis method for evaluating the impact of tower changes on the flicker of a wind turbine, comprising the following steps: when the percentage change in the height of the tower is less than or equal to a height change threshold, it is determined that the flicker characteristics of the wind turbine do not change; When changing the threshold, compare the distance difference with the distance threshold, compare the area difference with the area threshold; when the distance difference is greater than or equal to the distance threshold or the area difference is greater than or equal to the area threshold, determine the flicker characteristics of the wind turbine No change occurs; when the distance difference is less than the distance threshold and the area difference is less than the area threshold, the tower height is used to calculate the light and shadow flicker model, and the flicker value of the wind turbine after the tower height changes is obtained, which is judged according to the standard. The invention can solve the technical problem that when the height of the wind turbine tower changes, the flicker characteristic change of the wind turbine cannot be quantitatively analyzed, and a test report must be issued after field measurement.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to an analysis method for evaluating the impact of tower changes on the flicker of wind turbines. Background technique [0002] Voltage fluctuation and flicker are a very concerned issue in the current power quality research. Voltage fluctuation refers to a series of voltage changes or periodic changes in the power frequency voltage envelope, and flicker refers to the fluctuation of human eyes on lighting. Subjective visual experience, voltage fluctuation and flicker will bring a series of adverse effects on actual production and life. [0003] Due to the randomness and volatility of wind power generation, the output power of wind turbines is unstable. This unstable power is incorporated into the grid, which will cause grid voltage fluctuations and flicker problems, thereby affecting the power quality of the grid. Serious impact. During continuous operation and switc...
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IPC IPC(8): G06F30/27G06N3/08G06Q10/06G06F113/04G06F113/06
CPCG06F30/27G06Q10/06393G06N3/08G06F2113/06G06F2113/04
Inventor 刘一星王世均陈宝刚罗元宏张凯刘亚林胡豪
Owner CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP