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Temperature field simulation calculation method suitable for doubly-fed motor brush slip ring system

A brush slip ring, system temperature technology, applied in computing, electrical digital data processing, special data processing applications, etc., can solve the problems of low detection accuracy, instability, etc., to simplify the calculation model, improve the calculation speed, ensure Calculate the exact effect

Pending Publication Date: 2019-12-03
SHANGHAI ELECTRIC WIND POWER GRP CO LTD +1
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  • Abstract
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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a simulation calculation method for the temperature field of the double-fed motor brush slip ring system to solve the problems of low detection accuracy and instability in the prior art

Method used

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  • Temperature field simulation calculation method suitable for doubly-fed motor brush slip ring system
  • Temperature field simulation calculation method suitable for doubly-fed motor brush slip ring system
  • Temperature field simulation calculation method suitable for doubly-fed motor brush slip ring system

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Embodiment Construction

[0035] The working principle and technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation.

[0036] A temperature field simulation calculation method suitable for a double-fed motor brush slip ring system, comprising the following steps:

[0037] Step 1: Understand the brush slip ring system of large double-fed wind turbines, simplify the model according to the sameness of the three phases, establish a 3D model of the brush slip ring system, and simulate the temperature of the entire system by calculating the temperature field of one phase field.

[0038] Step 2: Mesh the established 3D model. In order to speed up the calculation and ensure the calculation accuracy of the simulated temperature field, different mesh division methods are used for different parts: high-density mesh is used for important parts of the brush slip ring Mesh division, use low-density mesh division ...

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Abstract

The invention discloses a temperature field simulation calculation method suitable for a doubly-fed motor brush slip ring system. The method comprises the following steps: establishing a 3D model of the brush slip ring system; meshing the 3D model according to the component distribution of the brush slip ring; acquiring material parameters, current magnitude, applied current load and boundary conditions of the brush slip ring; obtaining a heat generation rate and a convective heat transfer coefficient of the electric brush slip ring; and according to the 3D model after grid division, the material parameters, the current magnitude, the applied current load, the boundary condition, the heat generation rate and the convective heat transfer coefficient, performing simulation to obtain a temperature field of the electric brush slip ring. The temperature field condition of the electric brush slip ring under the working condition is accurately simulated by combining the working condition of the electric brush slip ring and utilizing knowledge related to electricity and thermodynamics, theoretical support is provided for temperature detection of an electric brush slip ring system, and technical support can also be provided for subsequent fault diagnosis of the electric brush slip ring.

Description

technical field [0001] The invention relates to the technical field of brushes, in particular to a temperature field simulation calculation method suitable for a double-fed motor brush slip ring system. Background technique [0002] With the rapid development of computer technology, the application of finite element analysis in engineering is becoming more and more extensive. The finite element analysis has the advantages of clear concept, strong adaptability, easy expression, and easy to deal with problems with complex geometric shapes. This makes finite element analysis In the process of solving practical engineering problems, the analysis can be closer to the actual situation and has higher accuracy. [0003] The brush slip ring system is used as the dynamic and static conversion device of the generator, and the unstable operation of the generator caused by the failure of the brush slip ring system in operation occurs frequently, causing heavy losses. In addition, the da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 巩源泉马宏忠潘文豪赵帅宋开胜
Owner SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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