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Method for distinguishing lightning stroke and non-lightning stroke faults of transmission line

A transmission line and identification method technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of induced overvoltage superimposed pollution, flashover tripping, difficulty in judging the nature of faults, etc., to achieve clear physical concepts and judgment ideas. clear effect

Active Publication Date: 2012-03-21
HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
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Problems solved by technology

When lightning occurs, a large number of lightning faults occur continuously. At the same time, the induced overvoltage caused by lightning near the lightning line may be superimposed on weak links such as pollution and vegetation to cause flashover tripping. It is difficult to judge the nature of the fault.

Method used

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  • Method for distinguishing lightning stroke and non-lightning stroke faults of transmission line
  • Method for distinguishing lightning stroke and non-lightning stroke faults of transmission line
  • Method for distinguishing lightning stroke and non-lightning stroke faults of transmission line

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Embodiment Construction

[0016] see figure 1 , figure 1 It is a flow chart of the steps of a lightning strike and non-lightning strike identification method for a transmission line of the present invention:

[0017] The identification method includes the following steps:

[0018] Step S101, acquiring power frequency fault current data and traveling wave current data recorded by a transmission line monitoring device for a fault.

[0019] In this step, the monitoring device adopts Rogowski coil sensors, which are distributed and arranged at different positions of the transmission line. When the monitoring device does not have a fault, the power frequency current sensor and the traveling wave current sensor are cyclically sampled. When a fault occurs, the power frequency fault current and traveling wave current will be generated, and the current amplitude exceeds the set threshold. Record the data of a fixed time length after the fault, and integrate and report it. When identifying lightning strikes a...

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Abstract

The invention provides a method for distinguishing lightning stroke and non-lightning stroke faults of a transmission line. According to the characteristics of fault traveling wave current on a transmission line lead, the wave tail time of faults traveling wave current is compared with a threshold value to identify lightning stroke and non-lightning stroke faults. The method has a very clear physical concept and has good practicality.

Description

technical field [0001] The invention relates to the field of intelligent diagnosis of transmission line faults in power systems, in particular to the field of lightning strike fault identification. Background technique [0002] Today, when the level of transmission lines is developing from ultra-high voltage to ultra-high voltage, lightning strikes are still one of the important reasons for the fault interruption of transmission lines, and have become a weak link in the current safe operation of lines. In responding to and dealing with transmission line lightning strike accidents, the line operation and maintenance department is very concerned about whether the line trip accident is indeed a lightning strike accident. Operation statistics show that transmission line faults are mostly related to seasons, and thunderstorms are also times when other accidents occur frequently, such as non-lightning faults caused by pollution flashover and vegetation dancing. Therefore, it is ne...

Claims

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Application Information

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IPC IPC(8): G01R31/02
Inventor 黄松邢铀孔武陈钦柱姚冬钱冠军高峰
Owner HAINAN POWER GRID CO LTD ELECTRIC POWER RES INST
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