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The method of measuring the strength of power frequency electric field and magnetic field for operators in 500kv substation

A technology of power frequency electric field and magnetic field strength, which is applied in the direction of measuring devices, instruments, etc.

Active Publication Date: 2015-08-05
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a lack of methods for measuring the strength of substation operators exposed to power frequency electric fields and power frequency magnetic fields

Method used

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Embodiment Construction

[0043] Below in conjunction with embodiment the present invention is further described.

[0044] A method to assess the intensity of substation operators exposed to power frequency electric field is as follows:

[0045] 1. A 500kV operator has a working shift of 2 days and 48 hours, and a total of 6 inspections in a working shift.

[0046] 2. The total inspection distance of the operating personnel is 1020 meters, and there are 69 inspection points that need to stay, including: #1 bus (CVT), bus coupler I, #1 station substation, #2B low-resistance, etc.

[0047] 3. When the operator makes a single inspection, the total inspection time T 巡 70 minutes, the stay time at the inspection point is 50 minutes, and the walking time of the inspection route is 20 minutes.

[0048] 4. There are 7 inspection points where the power frequency electric field strength exceeds 5kV / m, and the total stay time is 5 minutes.

[0049] 5. There are a total of 80 distribution points on the inspecti...

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Abstract

The invention relates to a method for measuring power frequency electric field intensity and magnetic field intensity which are in contact with an operating worker in a 500kV transformer substation. The level of the power frequency electric field intensity and the magnetic field intensity which are in contact with the operating worker in the transformer substation can be really reflected. The method comprises the specific steps of B, recording the inspection times N of the operating worker within a shift; B, conforming an inspection route of the operating worker, a total distance L of the inspection route for one time and inspection points where the operating worker is required to stay; C, recording time distribution on the inspection route of the operating worker for one time; D, performing point distribution on the inspection route and detecting the power frequency electric field intensity at the point distribution positions; E, detecting the power frequency electric field intensity and the magnetic field intensity at the positions of the inspection points required to stay; F, confirming the staying time T in a control room and detecting the power frequency electric field intensity and the magnetic field intensity in the control room; G, calculating and analyzing the power frequency electric field intensity and the magnetic field intensity which are in contact with the operating worker to obtain the level of the power frequency electric field intensity and the magnetic field intensity which are in contact with the operating worker in the transformer substation.

Description

Technical field: [0001] The invention relates to a method for measuring the strength of power frequency electric field and power frequency magnetic field, in particular to a method for measuring the strength of power frequency electric field and magnetic field that operators of 500kV substations are exposed to. Background technique: [0002] Studies have shown that the impact of power frequency electric fields and power frequency magnetic fields on the human body is a short-term effect and does not have a cumulative effect. Power frequency electric field and power frequency magnetic field are the main factors that may cause harm to the human body in substations, but there are not many studies on the strength of operating personnel exposed to power frequency electric field and power frequency magnetic field. [0003] Currently, the "Occupational Exposure Limits for Hazardous Factors in the Workplace Part 2: Physical Hazardous Factors" (GBZ2. T799-2010) stipulates that the ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02
Inventor 刘跟生巩泉泉张国英王坤窦丹丹周灿张兆波陈超
Owner STATE GRID CORP OF CHINA
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