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Fault probability online evaluation method of power transmission line faults caused by freezing rain

A transmission line, failure probability technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of relying on historical data, difficult to use, difficult to obtain a large amount of accurate historical data, etc.

Active Publication Date: 2014-03-26
STATE GRID ELECTRIC POWER RES INST +1
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  • Abstract
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Problems solved by technology

[0004] However, the method of historical data fitting can fit the failure probability curves in different ways, but this method is too dependent on historical data, and it is difficult to obtain a large amount of accurate historical data for freezing rain disasters, so this method is also difficult to apply in practice. use

Method used

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  • Fault probability online evaluation method of power transmission line faults caused by freezing rain
  • Fault probability online evaluation method of power transmission line faults caused by freezing rain
  • Fault probability online evaluation method of power transmission line faults caused by freezing rain

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Embodiment Construction

[0062] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0063] figure 1 Step 1 described in the control center summarizes the real-time freezing rain forecast (the range of freezing rain weather, the intensity of freezing rain, etc.) and live information, the general weather forecast (wind speed, wind direction, humidity, etc.) and monitoring information (measured transmission line ice thickness, insulator salt density, insulator ice thickness, etc.).

[0064] figure 1 Step 2 describes the geographical features along the line and the surrounding environmental features and their impact on freezing rain intensity, wind speed, and wind direction. Geographical features mainly include: plains, windward slopes, leeward slopes, mountain tops, valley bottoms, lakes, etc. Environmental features mainly include: vegetation conditions, pollution level, etc. The geographic features and surrounding environment fea...

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Abstract

The invention discloses a fault probability online evaluation method of power transmission line faults caused by freezing rain, and belongs to the technical field of electric power systems and automation. The method includes the steps that according to space-time evolution of freezing rain disasters, loads borne by lines and towers and flashover voltages borne by insulators are evaluated dynamically, the fault probability of the power transmission lines coated with ice is calculated, and expected risk equipment sets are provided for blackout defense systems. In the method, consideration is given to various fault ways when the power transmission lines are damaged by coated ice, and the method conforms to the mechanism that the coated ice triggers the line faults and is good in practicability and adaptability.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a method for quantitative assessment and early warning of damage caused by freezing rain disasters to transmission lines. Background technique [0002] The imbalance of energy distribution and consumption in our country makes it necessary to send electricity from the central and western regions to the eastern coastal areas through long-distance and large-scale power transmission. Transmission lines will pass through various terrain environments and experience the test of various external environments. In recent years, the occurrence of extreme natural disasters has become more frequent, which puts forward higher requirements for the safe and stable operation of transmission lines. The freezing rain disaster that occurred in southern China in 2008 caused great damage to the power grid, reminding people of the need for ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 薛禹胜谢云云
Owner STATE GRID ELECTRIC POWER RES INST
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