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A phase inspection method for overhead power lines

A technology of overhead lines and inspection methods, which is applied in the field of power systems, can solve problems such as instrument breakdown, and achieve the effect of saving manpower

Active Publication Date: 2020-01-31
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] It can be seen from the above that the above-mentioned technical solution is grounded through a resistance of 100 ohms, and the resistance is measured by a multimeter. The measuring instrument works in a dangerous environment of induced potential. Not only the staff cannot avoid the construction danger, but also there is a breakdown of the instrument. technical issues

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  • A phase inspection method for overhead power lines
  • A phase inspection method for overhead power lines
  • A phase inspection method for overhead power lines

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Experimental program
Comparison scheme
Effect test

Embodiment １

[0034] Table 1

[0035]

[0036] It can be known from the above table that the phase inspection method of the present invention is used for inspection, and the above steps are carried out for the three phases in turn. It can be seen that when the phase A is inspected, the test voltage drops to 21v. Therefore, it is concluded that the phase A is based on the same principle. A check for the other two phases is derived.

Embodiment ２

[0038] Table 2

[0039]

[0040] It can be seen from the above table that the phase inspection method of the present invention is used for inspection, and the above steps are carried out for the three phases in turn. It can be seen that when the phase A is inspected, the test voltage drops to 6v. Therefore, the conclusion is that the phase A is based on the same principle. A check for the other two phases is derived.

Embodiment ３

[0042] Table 3

[0043]

[0044] It can be seen from the above table that the phase inspection method of the present invention is used for inspection, and the above steps are carried out for the three phases in turn. It can be seen that when inspecting phase A, the test voltage drops to 12v. Therefore, it is concluded that it is phase A, and the same principle A check for the other two phases is derived.

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Abstract

The invention discloses a power overhead line phase checking method and belongs to the electric power system field. With the power overhead line phase checking method adopted, the technical problems of the personal risk of an operator and high possibility of being broken through and damaged of an operation instrument in the high-induced electromotive force environment of lines in the prior art can be solved. According to the power overhead line phase checking method of the invention, a capacitive voltage dividing method is adopted to measure the voltage of one end of a line, and a technical means of grounding a detection phase end and observing the change of the voltage is adopted, so that whether the two ends belong to the same phase is judged; and if the voltage is decreased, it is indicated that the two ends belong to the same phase, if the voltage is not decreased, the two ends do not belong to the same phase. The technical means is safe, convenient, efficient, time-saving and labor-saving. With the technical means adopted, the technical problems of risks brought to the operator and the instrument in the prior art can be well solved, and the technical task of power overhead line phase detection can be completed.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a phase inspection method for overhead power lines. Background technique [0002] High-voltage transmission lines are generally distributed in areas with complex terrain and variable climatic conditions. Faults are prone to occur, and line inspection and maintenance are difficult. At present, after the installation of overhead lines in power systems, phase inspection of overhead lines must be completed in accordance with the provisions of GB 50150-2016 "Electrical Equipment Handover Test Standards for Electrical Installation Engineering". [0003] At this stage, multimeters or phase detectors are generally selected for phase inspection. Phase detectors are used in phase verification and phase sequence verification of power lines and substations, and have functions such as phase verification, phase sequence measurement, and electrical inspection. It has strong ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R25/00G01R31/08
CPCG01R25/005G01R31/085
Inventor 裴继东蒋延磊王振方张军银高胜耿殿申林民杰赵建军
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN