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Test model for simulating wind-deviation inter-phase flashover of single-conductor power transmission lines and method for applying test model

A technology of test model and application method, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problem that there is no application method of the interphase wind deflection flashover test model, etc.

Pending Publication Date: 2017-01-04
湖北省超能电力有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, most of the experimental studies on wind deflection flashover focus on the field and direction of the breakdown of the air gap between the conductor and the tower body caused by the wind deflection of insulator strings. Experimental model and application method of network research

Method used

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  • Test model for simulating wind-deviation inter-phase flashover of single-conductor power transmission lines and method for applying test model
  • Test model for simulating wind-deviation inter-phase flashover of single-conductor power transmission lines and method for applying test model

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Embodiment

[0040] Such as figure 1 and figure 2 Shown: Two steel-core first aluminum stranded wires 1 and second aluminum stranded wire 2 with a length greater than 8m simulate the middle part of a single-conductor transmission line span, and are supported by 8 porcelain insulating pillars. The insulating pillars maintain a consistent height of about 1.2m, and the number of umbrella skirts reaches 14 pieces. The two ends of the aluminum stranded wire are fixed by two insulating pillars, and the middle part of the wire is supported by two insulating pillars to fix the bending arc of the wire. Adjusting the position of the insulating pillar and the bending arc of the aluminum stranded wire can obtain the minimum gap distance d between the wires that needs to be simulated. This paper The minimum gap distance applicable to the invention is 10cm-70cm. In order to ensure that the flashover point of the simulation test is close to the minimum gap distance between the lines, the bending arc of...

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Abstract

The invention discloses a test model for simulating wind-deviation inter-phase flashover of single-conductor power transmission lines and a method for applying the test model. The test model comprises a first aluminum stranded wire (1) and a second aluminum stranded wire (2). The first aluminum stranded wire is supported by at least four insulating support columns, and the second aluminum stranded wire is supported by at least four insulating support columns; grounding wires (11) are connected with two ends of the first aluminum stranded wire, and a power-frequency test voltage transformation system is connected with the second aluminum stranded wire. The test model and the method have the advantages that conditions that gap distances of a certain portion of two phases of conductors are reduced to a great extent while safety gap distances among other portions are still kept after the conductors are deviated by wind can be effectively simulated by the test model; insulator strings can be repositioned, so that the minimum inter-line gap distances can be changed by the test model, and flashover characteristics of the two phases of conductors at different gap distances in span under wind-deviation conditions can be simulated.

Description

technical field [0001] The invention relates to a test model and an application method thereof, in particular to a test model and an application method for simulating a wind-biased phase-to-phase flashover of a single-conductor transmission line, and belongs to the field of prevention and control of electrical faults in transmission lines. Background technique [0002] Transmission line wind deflection accident is a more prominent category of power grid faults in recent years, which can threaten the safe and stable operation of overhead transmission lines. Different from lightning flashover and operation shock flashover, most of the wind deflection flashovers occur under the working voltage, and generally fail to reclose successfully, resulting in the outage of the line and causing heavy losses to the national economy. [0003] In recent years, due to the influence of the greenhouse effect, special climates and abnormal weather are common occurrences, and the faults of line ...

Claims

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Application Information

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IPC IPC(8): G01R31/20
CPCG01R31/1272Y02E60/00
Inventor 杜勇姚京松王羽蓝磊李柏松吴军龙飞王浩王惠中刘晓华
Owner 湖北省超能电力有限责任公司
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