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Design method of inductance type current-limiting lightning rod on the basis of amplitude-frequency characteristic analysis

An amplitude-frequency characteristic and lightning rod technology, which is applied in the design field of inductive current-limiting lightning rods, can solve the problems of lack of optimal design method, failure to prove the lightning protection principle and lightning protection effect of inductive current lightning rods, etc., so as to improve safety and reliability. , Increase lightning protection measures, reduce the effect of lightning current steepness and amplitude

Active Publication Date: 2015-08-12
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Therefore, the basic lightning protection principle and lightning protection effect of the inductive current lightning rod cannot be proved, and there is no optimal design method proposed.

Method used

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  • Design method of inductance type current-limiting lightning rod on the basis of amplitude-frequency characteristic analysis
  • Design method of inductance type current-limiting lightning rod on the basis of amplitude-frequency characteristic analysis
  • Design method of inductance type current-limiting lightning rod on the basis of amplitude-frequency characteristic analysis

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Embodiment 1

[0027] Such as figure 1 As shown, a design method of an inductive current-limiting lightning rod based on the analysis of amplitude-frequency characteristics includes the following steps:

[0028] S1 Statistical analysis of the spectral characteristics of typical lightning current waveforms to determine the spectrum distribution range, the typical lightning current waveforms include 2.6 / 50 double exponential wave / slope wave, CIGRE waveform or Heidler waveform, such as Figure 2(a)-Figure 2(b) As shown; there are differences in typical lightning current waveforms in different regions, and a reasonable lightning current waveform can be selected in combination with the actual situation in the design area, and this design method is used.

[0029] S2 Assuming that the LC chain equivalent circuit of a typical inductive current-limiting lightning rod is known, use circuit analysis software to build the LC chain equivalent circuit of a typical inductive current-limiting lightning rod,...

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Abstract

The invention discloses a design method of inductance type current-limiting lightning rod on the basis of amplitude-frequency characteristic analysis. The design method is a design scheme which comprises the following steps: developing frequency spectrum characteristic analysis by aiming at a typical lightning current waveform; assuming that a link equivalent circuit under the high frequency of a current-limiting lightning rod, and analyzing the amplitude-frequency response characteristics of the equivalent circuit; assuming that the typical lightning current waveform passes through the link equivalent circuit of the inductance type current-limiting lightning rod, analyzing a relationship between output lightning current frequency spectrum characteristics, lightning current amplitude value and lightning current steepness of wave front change and link equivalent circuit amplitude-frequency response characteristics and an influence factor thereof; analyzing a link equivalent circuit parameter which affects an input / output lightning current amplitude value and the steepness of wave front change, and combining with the amplitude-frequency response characteristics to give an optimal parameter design range; and through the designed link equivalent circuit parameter, combining with finite element analysis to design the inductance type current-limiting lightning rod with a reasonable structure, a reasonable dimension and reasonable materials.

Description

technical field [0001] The invention relates to the field of lightning protection of transmission lines, in particular to a design method of an inductive current-limiting lightning rod based on amplitude-frequency characteristic analysis. Background technique [0002] Lightning tripping is one of the main causes of tripping faults in transmission lines in my country. With the in-depth research on the lightning mechanism and protection methods of transmission lines, the lightning protection technology of transmission lines has achieved rich research results, which has reduced the lightning accidents of transmission lines to a certain extent. However, with the improvement of technologies such as power equipment and protection devices, line tripping caused by lightning strikes on transmission lines is still the main cause of transmission line failures in my country. Improving the performance of transmission lines is of great significance to the safe and stable operation of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 韩永霞戴栋李立浧阮耀萱张杰
Owner SOUTH CHINA UNIV OF TECH
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