Method for calculating length of wire requiring tensioning for overlarge sagging arc distribution network wires

A calculation method and technology of wire length, which is applied in the field of calculation of the tight wire length of distribution network wires with excessive sag, and can solve problems such as large errors and ineffective implementation of visual methods

Active Publication Date: 2017-11-17
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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Problems solved by technology

[0005] In this method, the sag size is determined visually, and the error is relatively large, especially in places where t...

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  • Method for calculating length of wire requiring tensioning for overlarge sagging arc distribution network wires
  • Method for calculating length of wire requiring tensioning for overlarge sagging arc distribution network wires
  • Method for calculating length of wire requiring tensioning for overlarge sagging arc distribution network wires

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Embodiment Construction

[0075] The calculation process of a method for calculating the tight length of the distribution network conductor with excessive sag in the present invention is as follows: figure 1 shown.

[0076] The calculation method adopted in this embodiment, its calculation steps are as follows:

[0077] 1) Measure the length s of the distribution network wire between the two poles, the span is the horizontal distance l between the two poles, and the height difference between the two suspension points is the vertical distance h between the two points. If the length of the wire is not easy to measure, the length of the wire can be deduced by measuring the sag before tightening the wire.

[0078] 2) According to the measured wire length s, span l and height difference h, deduce the arc equation of the wire with excessive sag.

[0079] 3) According to the derivation results, the stress of the wire with excessive sag is obtained, and the stress is judged with reference to the standard to ...

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Abstract

The invention provides a method for calculating length of wire requiring tensioning for overlarge sagging arc distribution network wires. The method comprises following steps:(1) measuring the length s of a distribution network wire between two poles, the horizontal distance l between two poles, and height difference h between two hanging points; (2) deducing an arc equation for overlarge sagging arc wires; (3) obtaining stress for the overlarge sagging arc wires, and determining whether the wire can be tensioned according to a standard; (4) calculating corresponding target arc equation according to input target arc sagging value, and performing tension calculation on the equation after calculating, and judging according to the standard to determine whether wire tensioning is effective; (5) calculating the length of wire to be tensioned, and obtaining wire length of target arc wire according to the target arc equation. The method of the invention can realize automatic calculation by computer software. The invention can be applied to the wire tensioning construction of distribution network, and has the advantages of less measuring data, simple operation and convenient operation, and can provide great convenience for the distribution network maintenance personnel.

Description

technical field [0001] The invention relates to a method for calculating the tight wire length of distribution network conductors with excessive sag, belonging to the technical field of electric power distribution networks. Background technique [0002] The wires of the distribution network are hung on the poles at both ends, and they will naturally sag to form a sag. The sag size of the wires must be within an appropriate range, neither too large nor too small. When the sag is too large, the wire sags too much, and the distance between the wire and the surrounding objects is too small, which will easily cause the wire to touch the object, posing a safety hazard; in the case of wind blowing, the bare wire will also touch the wire, causing a phase-to-phase short circuit between the wires , leading to line tripping, power supply line outages, and reduced line power supply reliability. If the wire is tightened, the sag becomes smaller, but at this time the axial tension on the...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 郭亮范瑞祥王华云李升健郑蜀江安义李博江熊丽霞邓才波
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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