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A lightning overvoltage protection method for fan blades laid with deicing carbon fiber mesh

A technology of lightning overvoltage and carbon fiber mesh, which is applied in the direction of emergency protection circuit devices, electrical components, circuit devices, etc. used to limit overcurrent/overvoltage, can solve the problems of less research on lightning characteristics and reduce maintenance costs Effect

Active Publication Date: 2022-03-29
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are few studies on the lightning characteristics of the carbon mesh applied to the wind turbine deicing blade.

Method used

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  • A lightning overvoltage protection method for fan blades laid with deicing carbon fiber mesh
  • A lightning overvoltage protection method for fan blades laid with deicing carbon fiber mesh
  • A lightning overvoltage protection method for fan blades laid with deicing carbon fiber mesh

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Embodiment

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following examples.

[0031] Specific steps are as follows:

[0032] 1. Build the fan blade down-conductor and 690V carbon fiber mesh power supply circuit model;

[0033] 1.1 Lightning current modeling

[0034] The present invention is based on the research of a wind farm in North China. There are 30 wind turbines in zone I of the wind farm. According to the principle that the wind turbines are close in geographical position and different in altitude, they are divided into 4 sections, such as: figure 1 shown. Table 1 shows the lightning density distribution and average current amplitude of e...

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PUM

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Abstract

The invention relates to a lightning overvoltage protection method for fan blades laid with deicing carbon fiber nets, comprising the following steps: 1) according to the principle of equipotential connection, a plurality of parallel surge surges are respectively installed on the power cables at the front and rear ends of the carbon fiber nets The protector forms multi-level protection; 2) The number of surge protectors to be installed is determined by constructing the model of the fan blade downconductor and the carbon fiber mesh power supply circuit model and the lightning current mathematical model to simulate the lightning strike of the fan blade. Compared with the prior art, the present invention has the advantages of effectively reducing the voltage difference between the down-conductor and the carbon grid, protecting the fan blades, reducing the post-maintenance cost of the wind field, and the like.

Description

technical field [0001] The invention relates to the field of lightning overvoltage protection, in particular to a lightning strike overvoltage protection method for fan blades with deicing carbon fiber nets. Background technique [0002] In wind farms in higher latitudes, there is a serious icing problem on wind turbine blades. The change of the airfoil of the ice-covered blade leads to the unbalanced load of the unit, and the output of the fan is affected. For the ice coating problem, the existing solutions are divided into three categories: mechanical deicing, coating deicing and electric heating deicing. Mechanical de-icing refers to the use of ultrasonic waves to break the ice, and the centrifugal force of the sudden deceleration of the fan to remove the ice, but this de-icing method is easy to cause damage to the blades. Coating anti-icing is to coat the surface of the fan blade with hydrophobic material, but when the blade surface is fouled, the deicing efficiency of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04
CPCH02H9/045
Inventor 边晓燕王玺王振兴周歧斌
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER