Method for calculating clearance distance according to blade moving trajectory of wind generating set

Abstract

The invention discloses a method for calculating a clearance distance according to a blade moving track of a wind generating set, which comprises the following steps of: calculating a real-time three-dimensional coordinate of a current blade tip according to blade GPS (Global Positioning System) positioning information given by an existing blade track monitoring system of the wind generating set; building a tower structure model, and completing the building of a coordinate system with the bottom circle center of the tower as the origin; converting the real-time three-dimensional coordinates of the blade tip into three-dimensional coordinates in a coordinate system with the circle center of the bottom of the tower as the origin through a spherical coordinate conversion algorithm; establishing a dynamic equation of a straight line with the shortest distance from the blade tip position to the tower. and integrating the clearance distance and the unit state data to complete data modeling. The current blade clearance distance and the blade clearance distance at the next time enter a main control system of the wind generating set in real time through communication and participate in main control, and once the blade clearance distance is in an alarm mode, main control prevents the blades from sweeping the tower through related strategies such as rotating speed reduction and variable pitch. The safety of the blade tower and even the whole machine is provided.

Description

technical field [0001] The invention relates to the technical field of measurement and control of wind power generation, in particular to a method for calculating the clearance distance based on the running track of blades of a wind power generation unit. Background technique [0002] With the vigorous development of wind power generation, in the process of pursuing rapid mass development, the safety and security of wind power generating units has become more and more important. At the same time, with the vigorous development of wind farms before 2010, they are currently shrinking with time, unit performance, and service life. Accidents such as wind turbine tower sweeping, tower collapse, and blade breakage also occur frequently. In addition, the installed capacity of wind turbines in the Sanbei Plain has tended to be saturated, and the installation of wind turbines is gradually developing in sea and mountainous areas, thus promoting the development of high-tower and long-b...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the above problems by proposing a method for calculating blade clearance based on the running trajectory of wind turbine blades, which overcomes the problem that the existing technology cannot accurately obtain the blade clearance distance, and cannot dynamically and efficiently protect the safety performance of the unit question

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