Testing method of parameters and characteristics of lightning strike of electric transmission line
A test method and technology of transmission lines, applied in the direction of measuring, measuring electricity, and measuring devices using digital measurement technology, can solve problems such as inability to obtain information, inability to determine lightning shielding or counterattack, single sensor, etc.
Inactive Publication Date: 2011-04-27
TSINGHUA UNIV
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The applicant once proposed a pulse current measuring device based on a flexible Rogowski coil. The patent application number is 200710121795.1. Its disadvantage is that there is only a single sensor, so it can only measure the lightning current waveform of one leakage path, and cannot obtain more information, so it is impossible to determine whether the lightning strike is a shielding attack or a counterattack
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The testing method of the lightning strike parameter and the characteristic of transmission line that the present invention proposes, comprises the following steps:
[0018] (1) Test the lightning current on the first lightning conductor, transmission tower and three-phase conductors;
[0019] (2) Carry out integral restoration to all above-mentioned lightning current signals, obtain the analog signal proportional to the derivative of the measured lightning current;
[0020] (3) carry out A / D conversion to all analog signals that above-mentioned integration obtains, obtain digital signal;
[0021] (4) carry out operation processing to the digital signal output of all A / D conversion modules, obtain the lightning current signal under test;
[0022] (5) According to the polarity relationship of the lightning current waveform measured above, it is judged whether the lightning strike is a shielding strike or a counterattack. The judgment process is as follows:
[0023] If ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a testing method of parameters and characteristics of lightning strike of an electric transmission line, belonging to the technical field of electrician lightning protection. The testing method comprises the following steps: firstly, testing the lightning current on a first lightning conductor, an electric transmission tower and a three-phase lead; carrying out integration and reduction on all lightning current signals to obtain analog signals in proportion to the derivative of the tested lightning current; carrying out A / D conversion on all analog signals obtained by integration to obtain digital signals; carrying out operation processing on all digital signals output by an A / D conversion module to obtain signals of the tested lightning current; and judging whether the lightning strike is shielding failure or counterattack according to the polarity relation of the waveform of the tested lightning current. By using a multi-channel method, the invention not only can test the waveform of the lightning current of a lightning strike line but also can judge whether the lightning strike is counterattack or shielding failure easily according to the tested data, and can provide a theoretical basis for adopting pertinent lightning protection measures.
Description
technical field [0001] The invention relates to a method for testing lightning strike parameters and characteristics of transmission lines, in particular to lightning protection performance analysis of super- and extra-high voltage transmission lines and substations, and belongs to the technical field of electrical lightning protection. Background technique [0002] Lightning is an atmospheric discharge phenomenon that often occurs in nature. It has a major impact on the operation of the power system. When strong lightning strikes the transmission line, the line will generally trip and cause a power outage. With the increase of the voltage level of the power system, the height of the transmission line is getting higher and higher, so the accident of lightning strikes on the conductors of the transmission line is more likely to occur, which is called lightning strike in the power system. There are two cases of lightning strike transmission lines: counterattack and shielding...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00G01R19/25G01R31/00
Inventor 陈水明何金良
Owner TSINGHUA UNIV