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An overhead conductor and a risk assessment method of overtemperature of a connecting fixture thereof

A technology for connecting fittings and overhead wires, which is applied in the field of risk assessment and can solve problems such as the difficulty in evaluating the overheating risk of connecting fittings and describing the temperature rise of connecting fittings

Inactive Publication Date: 2019-01-08
NANJING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

Therefore, the above work is difficult to describe the temperature rise of connecting fittings during line operation, especially the influence of defective fittings on the temperature rise of transmission lines, and it is even more difficult to assess the risk of overheating of connecting fittings, which lays a hidden danger for the safe operation of the power system

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  • An overhead conductor and a risk assessment method of overtemperature of a connecting fixture thereof
  • An overhead conductor and a risk assessment method of overtemperature of a connecting fixture thereof
  • An overhead conductor and a risk assessment method of overtemperature of a connecting fixture thereof

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Embodiment Construction

[0065] The specific technical implementation of the present invention will be further described below with reference to the accompanying drawings, so that those skilled in the art can further understand the present invention without limiting their rights.

[0066] see figure 1 As shown, the first wire and the second wire are fastened by connecting fittings to realize butt connection. Among them, the position distribution of temperature sensors #1 to #12 for measuring temperature is as follows: figure 1 shown. Obtain the online monitoring data of the overhead conductor splicing fittings and their bilateral conductor axial sections, including the number of continuous sampling times, sampling intervals, splicing fittings and the temperature of the bilateral conductor axial sections (12 values ​​in the figure), and the two ends of the splicing fittings Differential voltage, current, ambient meteorological parameters, and hardware location information, wherein the ambient meteoro...

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Abstract

The invention relates to an overhead conductor and a risk assessment method of overtemperature of a connecting fixture thereof. The method comprises: obtaining a parameter identification model of axial micro-element thermal circuit of overhead conductor connection fittings, obtaining the on-line monitoring data of overhead conductor connection fixture and its two-side conductor axial section, pre-processing the monitoring data, identifying the parameters of the pre-processed monitoring data, and evaluating the overtemperature risk of the overhead conductor connection fixture in bad operation conditions on-line by using the identification data. The overhead conductor and the connected fittings are monitored on-line and the overtemperature risk is evaluated in real time, the abnormal temperature rise caused by the large contact resistance of the transmission line can be avoided and the local hot spot can be formed, and thus the safety and stability of the operation of the power system are improved.

Description

technical field [0001] The invention belongs to the technical field of risk assessment, and in particular relates to a risk assessment method for overheating of an overhead conductor and its connecting fittings. Background technique [0002] Connecting fittings, such as parallel groove clamps, T-shaped clamps and splicing pipes, etc., are important components of high-voltage overhead lines, which play the role of electrical connection and mechanical fixing of overhead wires, and need to carry line current. be widely used. In general, the connection fittings are installed on the wires by physical methods such as bolt fastening and hydraulic crimping, and the connection between the fittings and the wires is tight. However, the line operates under complex outdoor environmental conditions for a long time, and wind deflection, galloping, flashover and lightning strikes occur from time to time. These phenomena will cause stress changes and physical damage of the fittings and wir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06G06F17/50
CPCG06Q10/0635G06Q50/06G06F30/20
Inventor 应展烽洪玉娟范骐铭顾丽丽王欣
Owner NANJING UNIV OF SCI & TECH
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