Simulation method for researching influence on potential and electric field distribution of rod insulator by suspended sand

A technology of electric field distribution and simulation method, applied in the field of computer simulation, can solve the problem of not considering the influence of insulator potential and electric field, etc.

Inactive Publication Date: 2014-08-13
LANZHOU JIAOTONG UNIV
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Problems solved by technology

In view of the existing studies, the particle size of the suspended sand particles in the air around the insulator, the polarity of the charge carried by the sand particles, the mixed particle group of charged sand particles a

Method used

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  • Simulation method for researching influence on potential and electric field distribution of rod insulator by suspended sand
  • Simulation method for researching influence on potential and electric field distribution of rod insulator by suspended sand
  • Simulation method for researching influence on potential and electric field distribution of rod insulator by suspended sand

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Embodiment Construction

[0021] Hereinafter, the invention will now be described more fully with reference to the accompanying drawings, in which various embodiments are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0022] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0023] In the simulation, the QBN-25 rod-shaped porcelain insulator of my country's electrified railway catenary is selected, and its creepage distance is 1200mm. The structure is as follows: figure 1 shown. The working voltage of the insulator is power frequency single-phase alternating current, and the fluctuation range is 20-29kV. For the convenience of expression, the ...

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Abstract

The invention relates to a simulation method for researching the influence on the potential and electric field distribution of a rod insulator by suspended sand. The method comprises the steps of in order to research the influence on the along surface potential and electric field distribution of the insulator by suspended sand in the air, drawing a geometric simplified model of the rod insulator in suspended sand environment, and computing and analyzing the potential and electric field distribution of the insulator at different suspended sand states through an electrostatic field finite element method. The simulation results show that suspended electric neutrality sand in the air can slightly distort the along surface potential and electric field of the insulator; after the suspended sand is charged with the same electric quantity, the distortion amplitude of the along surface potential and electric field of the insulator are increased; the influence on the along surface potential and electric field of the insulator by the grain size, the quantity, the charged electric quantity and the polarity of the suspended sand is obvious. The simulation method can properly analyze the influence on the potential and electric field distribution of the rod insulator by the suspended sand.

Description

technical field [0001] The invention relates to a simulation method for studying the influence of suspended sand particles on the potential and electric field distribution of rod-shaped insulators, belonging to the field of computer simulation. Background technique [0002] The vegetation in Northwest my country is sparse, and sandstorms caused by severe land desertification have caused many flashover accidents of high-voltage transmission lines in my country. Some scholars have investigated in Xinjiang and found that flashover accidents in dusty environments account for about half of all high-voltage line external insulation flashover accidents. "Sand flash" has received the attention of the world. [0003] Dust weather not only accelerates the deposition of dust on the surface of insulators, but also turns the clean air around the insulator into a mixed medium of air and suspended sand particles. The potential and electric field of an insulator will change due to the sur...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02E60/76Y04S40/22Y02E60/00
Inventor 张友鹏赵珊鹏董海燕王思华陈志东伍亚萍赵斌
Owner LANZHOU JIAOTONG UNIV
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