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Method for evaluating transmission line fault caused by rainstorm

Active Publication Date: 2014-03-19
STATE GRID ELECTRIC POWER RES INST +1
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Problems solved by technology

[0006] In recent years, the frequency and degree of natural disasters have gradually increased and strengthened, and the threat to the security and stability of the power grid is increasing. However, there is no probability quantitative evaluation technology that meets the requirements of online security analysis and early warning. Therefore, it is urgent to conduct research on related technologies. to develop

Method used

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  • Method for evaluating transmission line fault caused by rainstorm
  • Method for evaluating transmission line fault caused by rainstorm
  • Method for evaluating transmission line fault caused by rainstorm

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Embodiment Construction

[0059] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0060] figure 1 In step 1, aggregate real-time rainstorm forecast and live information (rainfall intensity, duration, etc.), general weather forecast and live information, and real-time power grid working condition information in the control center.

[0061] figure 1 In step 2, the line is segmented according to the geographical features and surrounding environmental features, and the lines with similar or identical geographical features and surrounding environmental features are divided into one section, and the towers at the downstream exit of the slope and at the exit of the valley waterway are taken as the subject Towers affected by heavy rain.

[0062] figure 1 In step 3, linear extrapolation is performed based on the real-time detection data of Doppler radar to forecast the rainfall intensity and rainfall range in the future period.

[00...

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Abstract

The invention discloses a method for evaluating a transmission line fault caused by rainstorm and belongs to the technical field of power systems and automation of the power systems. According to the mechanism that the rainstorm causes the transmission line fault, an accurate line fault probability model is established, and internal and external factors relevant with the transmission line fault are correctly reflected, so that evaluation on the transmission line fault caused by the rainstorm does not depend on accumulated historical data, pole tower stress and strength calculation are also avoided, various relevant factors are fully considered, and the method has good adaptability. By adopting the method, transmission line risk management is pushed greatly, and the capacity of defending the power systems against external disasters is enhanced.

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 evaluating the failure probability of transmission lines caused by heavy rain. Background technique [0002] Due to the extremely unbalanced regional distribution of my country's primary energy and economic development, primary energy such as coal and water conservancy resources are mainly concentrated in the western region, while the regions with rapid economic development are concentrated in the eastern coastal provinces and cities. , west-to-east power transmission, and north-to-south mutual supply" has become the basic orientation of China's large-scale resource optimization and allocation. As a result, the national network is mostly covered in areas with high altitudes and complex topography and geology. The safe and reliable operation of transmission lines is closely related to meteorological and geol...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCY02A90/10
Inventor 薛禹胜吴勇军
Owner STATE GRID ELECTRIC POWER RES INST
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