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Method for calculating fault probability of overhead-cable mixed line and method for diagnosing fault probability of overhead-cable mixed line

A technology of mixed lines and failure probability, applied in the direction of calculation, complex mathematical operations, instruments, etc., can solve problems such as inability to obtain fault evaluation structure, inability to deal with defects, etc., to achieve the effect of reducing risk time

Pending Publication Date: 2022-02-15
CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are still some shortcomings in the existing research: only judging the overhead lines or only judging the cable lines, and all of them are judged by human subjectivity. Concrete evaluation structure for failures, unable to deal with impending defects

Method used

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  • Method for calculating fault probability of overhead-cable mixed line and method for diagnosing fault probability of overhead-cable mixed line
  • Method for calculating fault probability of overhead-cable mixed line and method for diagnosing fault probability of overhead-cable mixed line
  • Method for calculating fault probability of overhead-cable mixed line and method for diagnosing fault probability of overhead-cable mixed line

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Embodiment 1

[0063] This embodiment discloses a method for calculating the failure probability of an overhead-cable hybrid line, such as figure 1 and figure 2 As shown, the prediction method steps include:

[0064] S1: Obtain n types of first data information, where the first data information is the basic ledger data information and historical fault data information of the overhead-cable hybrid line to be predicted;

[0065] In this embodiment, the basic ledger data information includes real-time load rate data information, total line length data information, cable ratio data information, current meteorological condition data information, data information on whether there is a large construction site along the line, data information on the number of inspections, and data on operation Year data information; such as image 3 As shown in the figure, the historical fault data information includes m types of sub-fault data information and corresponding time data information, and the number o...

Embodiment 2

[0117] This embodiment discloses a method for diagnosing the fault probability of an overhead-cable hybrid line. The fault probability predicted by the fault prediction method in the first embodiment is used for diagnosis. The specific diagnosis steps include:

[0118] When F≤1.5, the method of line special patrol and on-duty is adopted to quickly adjust the grid mode;

[0119] When 1.5

[0120] When 2.5<F≤3.5, strengthen daily inspection of the power grid;

[0121] When F>3.5, do nothing.

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Abstract

The invention discloses a method for calculating fault probability of an overhead-cable mixed line and a method for diagnosing fault probability of the overhead-cable mixed line, and the method comprises the steps: obtaining n types of first data information, the first data information being basic ledger data information and historical fault data information of a to-be-predicted overhead-cable mixed line; selecting any type of first data information, and performing data analysis on the first data information to obtain a weight and evaluation matrix; performing fuzzy operation on the weight and the evaluation matrix to obtain a fuzzy comprehensive evaluation set, and traversing n types of first data information to obtain n fuzzy comprehensive evaluation sets; performing defuzzification on the n fuzzy comprehensive evaluation sets to obtain the fault probability of the overhead-cable mixed line to be predicted; the invention has the beneficial effects that timely and corresponding precautionary measures can be taken for faults on the mixed line, and the occurrence of risk time on the mixed line is reduced.

Description

technical field [0001] The invention relates to the field of line fault calculation, in particular to a method for calculating and diagnosing fault probability of an overhead-cable hybrid line. Background technique [0002] The high-voltage transmission line is the main artery of power grid operation, and its operation risk assessment and corresponding maintenance strategy are crucial to the safe and stable operation of the power grid. In the existing research, there are many risk assessment methods for pure overhead lines or pure cable lines. Wu Mingsong and others used AHP to evaluate the risk of cable lines; Ma Guang established a risk model of overhead lines by using the improved Monte Carlo method after considering the time-varying failure rate. [0003] However, the existing research still has the following shortcomings: only the overhead lines are judged or the cable lines are judged, and the judgment is made subjectively. When the mixed line needs to be judged, it c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06G06F17/16G06F17/18G06Q10/00
CPCG06Q10/06393G06Q10/0635G06Q10/20G06Q50/06G06F17/16G06F17/18
Inventor 赵艾萱段登伟柳维衡聂中睿韦炜廖彦洁陈智张正炜郑瑞骁宋航杨哲涵郎光娅
Owner CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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