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Power transmission line fault positioning method and system based on fuzzy calculation

A transmission line and fault location technology, which is applied in the direction of fault location and fault detection according to conductor type, etc., can solve the problems of improving the efficiency of low-voltage fault handling, the time-consuming and labor-intensive effect of manually finding fault points, and relying on manual search, etc., to achieve Rapid analysis and location, shortening fault inspection time, shortening the effect of user power outage time

Active Publication Date: 2022-03-01
STATE GRID SHANDONG ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the fault recording and ranging function is limited to 110kV and above voltage transmission lines, and there is no fault recording and protection ranging information for lines below 110kV. After a fault occurs on a line below 110kV, it can only rely on manual search
[0004] However, the method of manually finding the fault point is time-consuming and labor-intensive and the effect is not good. With the increasingly complex structure of the power grid, the increase in power load year by year, and the large-scale access to new energy sources, the requirements for the efficiency of low-voltage fault handling increase day by day
Moreover, due to the continuous improvement of users' feelings about obtaining electricity, the business environment has also put forward higher standards for the reliability of power supply, so the traditional manual inspection method of finding low-voltage lines in the past can no longer meet the requirements

Method used

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  • Power transmission line fault positioning method and system based on fuzzy calculation
  • Power transmission line fault positioning method and system based on fuzzy calculation
  • Power transmission line fault positioning method and system based on fuzzy calculation

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, embodiment 1 of the present invention provides a transmission line fault location method based on fuzzy calculation, including the following process:

[0033] Step 1: Enter fault information.

[0034] The input of the fault information refers to the user specifying the substation, the line, the CT transformation ratio of the line where the fault occurs, and the fault current fed back by this fault. According to the above information, the topology information and calculation parameters of the faulty line are collected, and the intelligent location calculation of the line fault is started.

[0035] Step 2: Obtain line topology information.

[0036] Collect the topology information of the faulty line, the line topology information includes the area where the line is located, the substation connected to the line, the name of the substation, the voltage level of the substation, the name of the line, the voltage level of the line, the CT ratio of ...

Embodiment 2

[0066] Embodiment 2 of the present invention provides a transmission line fault location system based on fuzzy calculation, including:

[0067] The data acquisition module is configured to: acquire fault line topology information and fault line parameter information;

[0068] The topology calculation module is configured to: determine the main line in the plurality of lines according to the obtained topology information, obtain the short-circuit impedance of the main line and the total length of the main line, and obtain the impedance per unit length of the line according to the short-circuit impedance of the main line and the full length of the main line;

[0069] The short-circuit capacity calculation module is configured to: obtain the short-circuit capacity corresponding to the entered short-circuit current according to the entered line fault information and the acquired fault line parameter information;

[0070] The fault distance calculation module is configured to: obta...

Embodiment 3

[0073] Embodiment 3 of the present invention provides a computer-readable storage medium on which a program is stored, and when the program is executed by a processor, the steps in the fuzzy calculation-based power transmission line fault location method described in Embodiment 1 of the present invention are implemented. .

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Abstract

The invention provides a power transmission line fault positioning method and system based on fuzzy calculation. The method comprises the following steps: acquiring fault line topology information and fault line parameter information; determining a main line in the plurality of lines according to the obtained topological information, obtaining main line short-circuit impedance and main line full length, and obtaining line unit length impedance according to the main line short-circuit impedance and the main line full length; according to the input line fault information and the obtained fault line parameter information, obtaining a short-circuit capacity corresponding to the input short-circuit current; according to the short-circuit capacity, respectively obtaining line fault short-circuit impedance under a single-phase fault, a two-phase fault and a three-phase fault, and respectively obtaining fault distances under the single-phase fault, the two-phase fault and the three-phase fault by combining the line impedance per unit length; according to the invention, rapid analysis and positioning of line faults are realized, and fault inspection time and user power failure time are effectively shortened.

Description

technical field [0001] The invention relates to the technical field of transmission line fault location, in particular to a transmission line fault location method and system based on fuzzy calculation. Background technique [0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art. [0003] At present, the fault recording and ranging function is limited to 110kV and above voltage transmission lines. There is no fault recording and protection ranging information for lines below 110kV. After a fault occurs on a line below 110kV, it can only rely on manual search. [0004] However, the method of manually finding the fault point is time-consuming and labor-intensive and the effect is not good. With the increasingly complex structure of the power grid, the increase in power load year by year, and the large-scale access of new energy sources, the requirements for the efficiency of low-voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/085Y04S10/52
Inventor 胡薇刘洋刘宏波罗鲁东钟世民刘嘉超张慧娄亮文宏成李滟锴郭晓峰孙菁孙丽君
Owner STATE GRID SHANDONG ELECTRIC POWER