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Construction method of dynamic strike distance and electrical geometric model of wind turbine blades based on lightning physics

An electrical geometric model, a technology of fan blades, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve problems such as no calculation method of blade lightning protection efficiency, vague physical concept of strike distance formula, and difficulty in applying fan blades.

Inactive Publication Date: 2019-06-14
SHANDONG UNIV
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Problems solved by technology

Since then, people have improved the strike distance formula in the electrical geometry method to adapt to different environments, but the strike distance formula still has the disadvantages of fuzzy physical concept and poor versatility, and it cannot reflect the strike distance of different positions and structures of ground objects. change, it is difficult to apply to complex rotating structures like fan blades
At the same time, the research of some existing technologies is mainly to analyze the lightning protection performance index of the designated point through the repeated calculation of the pilot model, and does not give the calculation method of the lightning protection efficiency of the blade as a whole

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  • Construction method of dynamic strike distance and electrical geometric model of wind turbine blades based on lightning physics
  • Construction method of dynamic strike distance and electrical geometric model of wind turbine blades based on lightning physics
  • Construction method of dynamic strike distance and electrical geometric model of wind turbine blades based on lightning physics

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[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0043] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention discloses a method for constructing a wind turbine blade dynamic striking distance and electric geometric model based on lightning physics. Based on a physical model of lightning leader development, a wind turbine blade dynamic striking distance method is used, different striking distances of different positions on a wind turbine blade are ensured, the striking distances are changed with the change of the position of the wind turbine blade, and the distribution feature of a blade dynamic striking distance is given. Assuming that a lightning down leader develops vertically downward, the dynamic striking distance and a traditional electrical geometric model are combined, and the electric geometric analysis model for the wind turbine blade is established. According to the improved electric geometric model provided by the invention, a theoretical basis is provided for lightning protection design and evaluation of the wind turbine blade, and an idea is provided for the lightning protection calculation of a ground object with a complex structure.

Description

technical field [0001] The invention relates to a method for constructing a dynamic strike distance and an electrical geometric model of a fan blade based on lightning physics. Background technique [0002] As an important part of clean energy, wind power's large-scale development is an important technical support for promoting the reform of my country's energy system. However, due to the environment in which the fan is located and its special structure, it is extremely vulnerable to atmospheric lightning strikes. The damage to blades in lightning accidents accounts for more than 40% of the total damage caused by lightning, and most of them are irreparable damages. The cost of wind turbine blades, hoisting, maintenance and other high expenses have seriously affected the economic and stable operation of wind farms. Therefore, finding a reliable method to evaluate the efficiency of the wind turbine blade lightning protection system is of great significance to the lightning p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 张黎王国政李庆民张雯芳邹亮赵彤方致阳
Owner SHANDONG UNIV
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