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Method for improving local step potentials of transformer substation

A substation and potential technology, applied in the direction of grounding devices, can solve the problems of inability to reduce the step potential and the difficulty of further increasing the buried density of the grounding body, and achieve the effect of reducing the step potential, improving the tolerance limit and protecting personal safety.

Active Publication Date: 2014-07-16
广东电网有限责任公司惠州供电局 +3
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Problems solved by technology

However, sometimes it is difficult to further increase the buried density of the grounding body, and laying a high-resistance layer on the surface cannot reduce the step potential, and sometimes only laying a high-resistance layer still cannot meet the safety requirements, so other measures need to be taken

Method used

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  • Method for improving local step potentials of transformer substation
  • Method for improving local step potentials of transformer substation
  • Method for improving local step potentials of transformer substation

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. However, the examples given are not intended to limit the present invention.

[0026] A method for improving local stepping potential of a substation, comprising the following steps:

[0027] Step 1. Analyze the performance of the grounding grid and determine the area where the step potential exceeds the standard.

[0028] Step 2 Survey the water level of the substation to determine the length of the grounding pipe;

[0029] Step 3. Use a metal pipe as the grounding pipe. The diameter of the grounding pipe is 3-5cm. There are holes a every 20-30cm on the wall of the grounding pipe.

[0030] The grounding pipe is preferably a stainless steel pipe or a hot-dip galvanized steel pipe

[0031] Step 4. Use a drilling rig to drill hole b in the ground. The diameter of hole b is the ...

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Abstract

The invention relates to a method for improving local step potentials of a transformer substation, and belongs to the technical field of transformer substation operation and high voltage, wherein the method is used for improving the local step potentials of a standard-exceeding area of the transformer substation and protecting the safety of personnel in the transformer substation. The method comprises the steps of analyzing the performance of a grounding network, determining the area with the step potentials exceeding the standard, surveying the water lever of the transformer substation, determining the length of a grounding pipe, manufacturing the grounding pipe, arranging the grounding pipe in a buried mode and welding the grounding pipe and the horizontal grounding network. The method increases the human body tolerance limiting value, lowers the step potentials and effectively protects the personal safety.

Description

technical field [0001] The invention relates to a method for improving the local stepping potential of a substation, which is used for improving the stepping potential in a local over-standard area of ​​the substation and protecting the safety of personnel in the substation, and belongs to the technical fields of substation operation and high voltage. Background technique [0002] In the power system, for the needs of work and safety, the shell of the power system and its electrical equipment, zero potential reference point, shielding layer, etc. are often connected to the earth, which is called grounding. The substation grounding system is the fundamental guarantee and important measure to maintain the safe and reliable operation of the power system and ensure the safety of operating personnel and electrical equipment. [0003] Generally, the grounding device of power generation and substations is a horizontal grounding grid with the outer edge closed and several equalizing...

Claims

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Application Information

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IPC IPC(8): H02B1/16
Inventor 朱毅刚谢兵平张波李谦吴锦鹏张云钟振鑫马志学陈伟军林志明肖磊石王锦永
Owner 广东电网有限责任公司惠州供电局
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