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A method for judging fault types of lightning current in transmission lines

A fault type and lightning current technology, applied in the fault location, detecting faults according to 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 strengthen lightning current monitoring and save patrolling. The manpower and material resources of the line, the effect of reducing lightning accidents

Active Publication Date: 2021-09-28
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
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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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  • A method for judging fault types of lightning current in transmission lines
  • A method for judging fault types of lightning current in transmission lines
  • A method for judging fault types of lightning current in transmission lines

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specific Embodiment approach 1

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

[0025] Initial step: 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 the three-phase line in real time, and execute Step 2 when the tower is struck by lightning;

[0027] Step 2: Determine whether the lightning current at the top of the tower is collected at time A, if it is determined that the lightning strikes the tower at time A, then perform step 3, otherwise determine that lightning shields the line at time A, and then perform step 4;

[0028] Step 3: J...

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Abstract

The invention relates to a method for judging the fault type of a lightning current of a transmission line, which relates to the technical field of lightning strike fault identification of a transmission line. The purpose of the invention is to accurately judge the fault type in the operation of the existing power grid. In the present invention, the sensor installed on the top of the tower directly measures the direct lightning strike, and the sensor installed on the three-phase line indirectly measures the lightning current propagating along the line. The key parameters of the system are accumulated, and by analyzing the measurement data, the fault type of the tower is judged.

Description

technical field [0001] The invention belongs to the technical field of lightning strike fault identification of transmission lines. Background technique [0002] Lightning is a strong electromagnetic phenomenon that occurs frequently in nature and affects a large area. 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 high-voltage transmission line tripping, which has seriously affected the safe and reliable operation of the power grid. Contents of the invention [0003] The object of the present invention is to accurately determine the type of fault in the operation of the existing power grid, and now provides a method for determining the type of fault in the lightning current of a transmission line. [0004] A method for judging the fault type of a trans...

Claims

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Application Information

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Patent Type & Authority Patents(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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