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Overhead transmission line ground wire deicing jump risk early warning method and system

An overhead transmission line and deicing jumping technology is applied in the field of risk warning methods and systems for deicing and jumping of conductors of overhead transmission lines. The effect of functionality and practicality

Pending Publication Date: 2021-09-03
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that de-icing of overhead transmission lines can lead to drastic changes and obvious jumps in the tension of the ground wire, which can cause line tripping, the present invention provides a method for early warning of the risk of de-icing and jumping of the ground wire of overhead transmission lines, including:

Method used

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  • Overhead transmission line ground wire deicing jump risk early warning method and system
  • Overhead transmission line ground wire deicing jump risk early warning method and system
  • Overhead transmission line ground wire deicing jump risk early warning method and system

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Embodiment 1

[0047] The invention provides an early warning method for the risk of deicing and jumping of the conductor and ground wire of an overhead transmission line. Prediction of deicing jump trend, early warning of deicing jump risk level, etc.

[0048] The invention provides an effective solution for early warning of deicing and jumping risk levels of overhead power transmission lines in relatively serious ice-covered areas. The early warning work of the deicing jump risk level of the overhead transmission line carried out according to the present invention plays a very important role in improving the ability of the power grid to resist the deicing jump disaster.

[0049] The present invention provides a method for early warning of the risk of deicing and jumping of the ground wire of the overhead transmission line, such as figure 1 As shown, it mainly includes:

[0050] S1 calculates the hourly conductor icing thickness based on the acquired hourly weather forecast data on a cert...

Embodiment 2

[0103] Based on the same inventive concept, the present invention also provides an early warning system for the risk level of deicing and jumping of the ground wire of the overhead transmission line, such as image 3 As shown, it includes: ice thickness calculation module, level determination module, risk level early warning module; the functions realized by it, such as Figure 4 Shown:

[0104] The ice coating thickness calculation module is used to calculate the hourly conductor ice coating thickness based on a certain time scale hourly weather forecast data using a predetermined conductor ice thickness calculation formula;

[0105] The formula for calculating the ice thickness used is shown in the following formula:

[0106]

[0107] In the formula, R is the ice thickness (mm), N is the time of the freezing rain process (h), P is the process precipitation rate (mm / h), ρ 0 Be the density of water (1g / cm3), ρ is the density (0.9g / cm3) of rime, V is the wind speed (m / s), ...

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Abstract

The invention discloses an overhead transmission line ground wire deicing jump risk early warning method and system, and the method comprises the steps: employing a lead icing thickness calculation formula and a daily radiation value calculation formula based on weather forecast data, and calculating the lead icing thickness and the daily radiation value respectively; predicting a de-icing trend grade based on the wire icing thickness, the daily radiation value and the highest temperature; simulating the response of the overhead transmission line by adopting a pre-constructed finite element model based on the weather forecast data, and determining a deicing jump trend level; and determining an overhead transmission line deicing jump risk grade early warning based on the deicing trend grade and the deicing jump trend grade. According to the invention, an effective solution is provided for early warning of the deicing jump risk level of the overhead transmission line in areas with serious icing in China; and a basis is provided for pre-judging deicing jump to carry out line mechanical deicing or ice melting, and scheduling, operation and maintenance and other work can be well done timely and powerfully.

Description

technical field [0001] The invention relates to the field of disaster prevention and mitigation of power grids, in particular to a risk warning method and system for deicing and jumping of ground wires of overhead transmission lines. Background technique [0002] Uneven icing and deicing of conductors in different periods are common phenomena in transmission lines in ice areas. Deicing of conductors will cause violent movement of conductors, causing the conductors to jump up and down, which will reduce the air gap in the conductor stalls, and even Phase-to-phase flashover; at the same time, the deicing jump will also generate a large dynamic tension on the insulator string, fittings and iron towers, which will have a destructive effect on them. In the case of large spans in heavy ice areas, the impact of deicing on the conductors is particularly significant [0003] The de-icing of overhead transmission lines can lead to drastic changes and obvious jumps in the tension of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06311G06Q10/0635G06Q50/06Y04S10/50Y02A30/00
Inventor 杨加伦刘彬张立春赵彬夏令志严波操松元展雪萍马潇李鹏李丹煜刘亚多姬昆鹏任西春
Owner CHINA ELECTRIC POWER RES INST
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