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Timely detection method of distribution network switch tripping

A tripping and timely technology, applied in the direction of measuring devices, instruments, measuring electricity, etc., can solve problems affecting production, long-term power outages, etc.

Active Publication Date: 2017-01-25
国网河北故城县供电公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fault tripping is not easy to be found, causing large-scale and long-term power outages, affecting production

Method used

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Embodiment Construction

[0027] The method for timely detection of a distribution network switch trip proposed by the present invention will be further described below in conjunction with the embodiments.

[0028] The method of timely detection of distribution network switch tripping,

[0029] The method includes the following steps:

[0030] The first step is to collect and compare the load

[0031] Extract the first real-time line load of each line from the main control center of the substation through the data acquisition module; and store the first real-time line load in the storage unit corresponding to each line as the comparison load of each line;

[0032] The second step is to collect new instant load

[0033] At an interval of 1-5 seconds, the second instant line load of each line is extracted from the main control center of the substation again,

[0034] The third step is to obtain the load change rate

[0035] Use the formula load change rate = (second instant line load - comparative lo...

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Abstract

The invention belongs to the technical field of power grid overhauling and maintaining methods, and discloses a method for finding tripping of distribution network switches in time. The method is mainly characterized by including the following steps: (1) collecting comparison loads; (2) collecting new instant loads at a 1-s-to-5-s interval; (3) obtaining the load change rates with the formula that the differences of the second instant circuit loads and the comparison loads are divided by the comparison loads to be multiplied by 100%, when the absolute values of the load change rates are smaller than 20%, storing the second instant circuit loads into storage units of corresponding circuits to serve as the new comparison loads, and executing the step (2) again; when the absolute values of the load change rates are larger than or equal to 20%, starting alarm systems of the circuits to remind that abnormal tripping possibly exists in the circuits. When the absolute values of the load change rates are larger than or equal to 20%, it is shown that the abnormal tripping exists in the circuits, the alarm systems of the circuits are started, after obtaining alarms, regulating and control persons immediately look over running curves of the circuits and notify circuit running persons in time, the tripped distribution network switches are found rapidly, faults and defects are rapidly processed, and power supply reliability and power supply service quality are improved.

Description

technical field [0001] The invention belongs to the technical field of line detection and maintenance methods, and in particular relates to a method for timely detection of tripping of distribution network switches. Background technique [0002] In order to ensure a more reliable operation of the power grid distribution network and improve the quality of operation and service, the 10kV distribution line has installed a distribution switch with a protection setting value on a large branch or a certain trunk line section. When the installed distribution switch protects the area When a phase-to-phase short circuit or other fault occurs within the branch or main line, the branch or main line switch will trip in the area where the protection action occurs. The lines and distribution transformers of the power grid distribution network are generally operated in the wild and unattended. Fault tripping is not easy to be found, resulting in large-scale power outages for a long time, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02
Inventor 高福奎于兴荣
Owner 国网河北故城县供电公司
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