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Power transmission line lightning current fault type judgment method

A fault type and lightning current technology, applied in the fault location, detecting faults by conductor type, measuring electricity, etc., can solve the problems of high-voltage transmission line tripping, affecting the safety and reliable operation of the power grid, etc., to reduce time costs, save manpower and The effect of material resources, huge social and economic benefits

Active Publication Date: 2020-03-27
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to domestic and foreign operating experience, lightning strikes have become the main cause of high-voltage transmission line tripping, which has seriously affected the safe and reliable operation of the power grid.

Method used

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  • Power transmission line lightning current fault type judgment method
  • Power transmission line lightning current fault type judgment method
  • Power transmission line lightning current fault type judgment method

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specific Embodiment approach 1

[0024] Specific embodiment one: reference figure 1 Specifically describing this embodiment, the method for judging the fault type of the lightning current of the transmission line described in this embodiment is characterized in that it includes the following steps:

[0025] Initial steps: install a lightning current sensor on the top of the tower and on the a, b, and c phase lines of the three-phase line respectively, and the lightning current sensor is used to collect the lightning current at their respective locations;

[0026] Step 1: Collect the lightning current on the top of the tower and on the three-phase line in real time. When the tower is struck by lightning, perform Step 2;

[0027] Step 2: Determine whether the lightning current at the top of the tower is collected at time A, if yes, determine that the tower has been struck by lightning at time A, and then perform step 3, otherwise determine that lightning shielding the line at time A, and then perform step 4;

[0028] St...

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Abstract

The invention discloses a power transmission line lightning current fault type judgment method, and relates to the technical field of power transmission line lightning fault identification. The objectof the invention is to accurately determine the fault type in the existing power grid operation. According to the invention, direct measurement of direct lightning is carried out through the sensor installed at the tower top, a sensor installed on a three-phase line is used for indirectly measuring lightning current transmitted along the line, accurate full-waveform lightning parameters which aredirectly measured and key parameters which are indirectly measured in a large range are subjected to data accumulation, and the fault type of the tower is judged by analyzing measured data.

Description

Technical field [0001] The invention belongs to the technical field of lightning fault identification of transmission lines. Background technique [0002] Lightning is a strong electromagnetic phenomenon that frequently occurs in nature, with a large area of ​​influence. Transmission lines are an important part of the power grid, with a distribution range of thousands of kilometers, and are extremely vulnerable to lightning strikes. According to domestic and foreign operating experience, lightning strikes have become the main cause of tripping of high-voltage transmission lines, and have seriously affected the safe and reliable operation of the power grid. Summary of the invention [0003] The purpose of the present invention is to accurately determine the fault type in the operation of the existing power grid, and now provides a method for determining the fault type of the lightning current of the transmission line. [0004] A method for judging the fault type of the lightning cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088
Inventor 申岩于文斌韩月段方维
Owner HARBIN INST OF TECH
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