Power transmission line joint fault probability calculation method based on environment dependent failure

A transmission line, failure probability technology, applied in complex mathematical operations, climate sustainability, ICT adaptation, etc., can solve problems such as uncertain number of overhead lines and difficulties

Active Publication Date: 2019-12-20
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the failure probability of transmission lines based on environment-dependent failure, it was usually judged and confirmed based on the occurrence probability of catastrophic environment and its influence range in the past, but this ca

Method used

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  • Power transmission line joint fault probability calculation method based on environment dependent failure
  • Power transmission line joint fault probability calculation method based on environment dependent failure
  • Power transmission line joint fault probability calculation method based on environment dependent failure

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with specific embodiment:

[0050] A method for calculating the combined failure probability of transmission lines based on environment-dependent failures described in this embodiment is aimed at figure 1 The multi-line parallel power supply system shown, and considering the change of parallel line operation mode and the uncertainty and randomness of the climate, the specific steps are as follows:

[0051] S1. Obtain the i-th line L from the meteorological data acquisition system i The operating meteorological data, using the probability analysis method to determine the i-th line L i The probability p of severe and normal climatic conditions when passing through n regions with different climatic conditions in a certain operating period ad (n) and 1-p ad (n);

[0052] S2. Obtain transmission line operation data from the grid energy management system EMS;

[0053] S3. Based on the transmission line ...

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Abstract

The invention discloses a power transmission line joint fault probability calculation method based on environment dependent failure. The power transmission line joint fault probability calculation method is characterized by considering uncertainty and randomness of a power grid operation mode and a climate state at the same time; obtaining power grid operation data through a power grid energy management system EMS; when the uncertainty of a power grid operation mode is considered, mainly introducing the uncertainty operation state of a line; when the uncertainty of the climate state is considered, mainly introducing the uncertainty state of the climate; and assuming that a load is a deterministic load, that is to say, there is no relationship with the probability of environment-dependent failure of the power transmission line, calculating the probability of environment-dependent failure when the line passes through regions with different weather conditions (assuming that the weather conditions of two adjacent regions are different) on the basis of probability analysis, and providing necessary technical support for determining the reliability of the power transmission line.

Description

technical field [0001] The invention relates to the technical field of electric power system and its automation, in particular to a method for calculating joint failure probability of transmission lines based on environment-dependent failure. Background technique [0002] Many overhead lines may be exposed to harsh, even catastrophic environments. Harsh environment usually refers to unsuitable weather conditions like windy, rainy, snowy, etc., while catastrophic environment refers to natural disasters such as blizzards, tornadoes, fires, floods, earthquakes, etc. Any severe weather conditions or storm damage will greatly increase the probability of failure of all exposed transmission lines. Although this occurs infrequently and for a short duration, during this period the probability of component failure increases significantly and overlapping failures of multiple transmission lines or failure of entire subsystems may occur. Essentially, context dependency failure means th...

Claims

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Application Information

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IPC IPC(8): G06F17/18
CPCG06F17/18Y02A90/10Y04S10/50
Inventor 余方明吴杰康杨金文何家裕梁继深庄仲
Owner GUANGDONG UNIV OF TECH
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