System for testing property of thunder and lightning traveling wave of power transmission line

A transmission line and characteristic testing technology, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as the monitoring system for electromagnetic transient simulation experiments of lightning strikes that have not been seen on transmission lines

Active Publication Date: 2013-09-04
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

[0003] At present, there is no lightning strike electromagnetic tran

Method used

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  • System for testing property of thunder and lightning traveling wave of power transmission line
  • System for testing property of thunder and lightning traveling wave of power transmission line
  • System for testing property of thunder and lightning traveling wave of power transmission line

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Embodiment Construction

[0059] A / D converter and single-chip processor can use HR6100 tester. The data acquisition part of the tester adopts parallel acquisition technology, and the acquisition rate is as high as 20Msps per channel. Especially suitable for high-speed dynamic data measurement and analysis. The HR6100 test system has a built-in large-capacity memory and multiple trigger modes to ensure accurate capture of qualified data, especially the capture of state data before and after the surge current occurs. Negative delay length can be set, the longest can be as long as 512K word length. Adopt 12bit~16bitAD converter to guarantee enough amplitude precision. Acquisition part technical indicators: data acquisition adopts high-speed, parallel acquisition, and the number of acquisition channels is multi-channel; the maximum sampling rate of each channel is 20Msps; acquisition has manual and internal trigger methods; the data storage length of each channel is 512k data words.

[0060] The struct...

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PUM

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Abstract

The invention provides a system for testing the property of a thunder and lightning traveling wave of a power transmission line. The system consists of a power transmission line thunder and lightning electromagnetic transient movable mold device and an intelligent monitoring device; and on the basis of a power transmission line and lightning conductor model, a pole tower and pole tower grounding body model and an insulator model, the pole tower is divided into a slantwise material section, a cross arm section and a main material section, and in consideration of factors of the insulator, the power transmission line and the lightning conductor, a lightning stroke transient equivalent circuit is built in a simulation way by the corresponding wave impedance, self-impedance, mutual impedance, self-admittance, mutual impedance, inductance and the like. The intelligent monitoring device is formed by the means that a current or voltage sensor is sequentially cascaded with an A/D (analog to digital) convertor, a singlechip, and a display or an oscilloscope. Impact current is added into different positions of the system, so that signals of the lightning conductor and the conductor wire arranged at a far end can be measured, the propagation process of the lightning wave at the whole power transmission line can be analyzed, and the anti-thunder weak section of the power transmission line can be optimized and the lightning protection of substation equipment can be carried out according to an analysis result.

Description

technical field [0001] The invention relates to an electromagnetic transient process simulation experiment monitoring system of a power transmission line when lightning strikes, in particular to an electromagnetic transient process simulation test system when lightning directly strikes the top of a tower or a lightning shields a transmission wire. Background technique [0002] Judging from the actual operation of power grids in various countries, lightning strikes are still the main hazard to the safe and reliable operation of transmission lines, and the proportion of line trips caused by lightning strikes to the total number of faults continues to increase. More than half of the power system accidents in Japan and Sweden were caused by lightning strikes on transmission lines; Egypt also had a national power outage due to lightning strikes on transmission lines; - 500kV voltage level transmission lines have been in operation for 3 consecutive years, and lightning accidents h...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R23/16
CPCG01R29/0842
Inventor 李建明罗涛陈少卿马啟潇张榆文丽
Owner STATE GRID CORP OF CHINA
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