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Windage yaw flashover risk assessment method in sand and dust environment of power transmission line

A transmission line and risk assessment technology, applied in the direction of instruments, data processing applications, resources, etc., can solve problems that cannot truly reflect the impact of transmission lines, and achieve the effect of guiding differentiated design and operation and maintenance

Pending Publication Date: 2020-02-14
ILI POWER SUPPLY COMPANY SATE GRID XINJIANG ELECTRIC POWER +1
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  • Application Information

AI Technical Summary

Problems solved by technology

Existing studies on wind-biased flashover risk assessment methods for transmission lines only consider the impact of common meteorological factors such as strong winds, rain, snow, temperature and humidity on wind-biased flashovers of transmission lines, and most of them ignore the dust caused by the reduction of air insulation strength. At the same time, the weight of each evaluation index in the current traditional index evaluation system method is fixed, but the risk flashover accident of transmission line wire is a multi-factor time development process, and its risk is dynamically changing. Traditional evaluation methods often differ from the actual situation, and cannot truly reflect the impact of different risk factors on transmission lines in wind deflection flashover accidents.

Method used

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  • Windage yaw flashover risk assessment method in sand and dust environment of power transmission line
  • Windage yaw flashover risk assessment method in sand and dust environment of power transmission line
  • Windage yaw flashover risk assessment method in sand and dust environment of power transmission line

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Embodiment Construction

[0029] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below in conjunction with the accompanying drawings and through specific embodiments.

[0030] Such as figure 1 As shown, the present invention provides a wind deflection flashover risk assessment method under the sand dust environment of a transmission line, and the method comprises the following steps:

[0031] S1. Identify the risk source of flashover due to wind deviation, from the operating geographical environment of the transmission line, the meteorological environment where the transmission line is located, and the operating status of the transmission line.

[0032] S2. Establish a wind deflection flashover risk assessment index system for transmission lines, such as figure 2 As shown, and the risk level is divided: when the risk value p≥3.5, the risk level is level IV, indicating extremely high risk; when 2.5≤p<3.5, the risk level i...

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Abstract

The invention relates to a windage yaw flashover risk assessment method in a sand and dust environment of a power transmission line. The method comprises the following steps: S1, identifying a windageyaw flashover risk source; S2, establishing a power transmission line windage yaw flashover risk assessment index system, and performing risk grading; S3, giving a risk assessment scoring standard according to the accident case and the statistical data, and calculating a general standard weight; S4, calculating a specific power transmission line standard weight; S5, evaluating the influence of sand and dust factors on the air insulation strength; S6, updating weight factor changes; and S7, evaluating the real-time windage yaw flashover risk of the specific power transmission line. According to the method, the influence of sand and dust on windage yaw flashover of the power transmission line is fully considered. Meanwhile, the weight value of the evaluation index is updated in real time through feedback data in the windage yaw flashover accident development process, and the risk situation of windage yaw flashover of the power transmission line in the sand and dust environment can be judged more reasonably.

Description

technical field [0001] The invention relates to the technical field of power grid disaster prevention and mitigation, and more specifically, relates to a method for assessing the risk of wind deflection flashover in dusty environment of transmission lines. Background technique [0002] A large number of overhead transmission lines and other power transmission and transformation equipment in the power grid are exposed to the atmospheric environment for a long time, and their operation safety is directly related to the operation safety of the power system. Long-term operation experience shows that the failure of power transmission and transformation equipment caused by dusty weather environment is one of the main reasons affecting the safety of power systems. According to statistics, in the past three years, there have been more than 300 wind deflection discharges on State Grid Corporation’s 110kV and above lines, including more than 50 wind deflection discharges on 500kV line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0635G06Q50/26
Inventor 罗淞徐闯邓慰邓健邓鹤鸣倪勇蔡佳益党喜亮仲昭峰张江超关兴宇文强秦澔澔程鹏车峰
Owner ILI POWER SUPPLY COMPANY SATE GRID XINJIANG ELECTRIC POWER
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