Impedance load point selection method for electromagnetic scattering of high tension overhead transmission lines
A transmission line, electromagnetic scattering technology, applied in the direction of electromagnetic field characteristics, measurement of electrical variables, measurement devices, etc., can solve problems such as difficult to meet the requirements of the protection distance
Active Publication Date: 2016-03-09
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology
This kind of protection distance has a large safety margin, but it is difficult t...
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[0136] In order to verify the effectiveness of the overhead transmission line series magnetic ring on electromagnetic scattering suppression and the effectiveness of the hybrid algorithm, the electromagnetic scattering test of the overhead line series magnetic ring was carried out. The simulation test is as follows: image 3 shown;
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The invention relates to an impedance load point selection method for electromagnetic scattering of high tension overhead transmission lines. The method comprises that (1) an electric field integration equation of induction current generated by excitation of a metal conductor incident field of the transmission lines is established; (2) the electric field integration equation is converted into a metal-conductor matrix equation set based on a matrix method; (3) an overhead-line matrix equation set is established based on frequency-domain multi-conductor transmission line method; (4) a mixed equation set of the metal-conductor matrix equation set and the overhead-line matrix equation set is established; and (5) the impedance load point of electromagnetic scattering of the high tension overhead transmission lines is selected according to the mixed equation set. The provided method is highly accurate, and can be used to select the optimal load point when the electromagnetic scattering for electromagnetic waves of specific frequency of the high tension transmission lines is inhibited, and thus, electromagnetic scattering for different types of radio stations of the high tension transmission lines can be inhibited in an economical and efficient way.
Description
technical field [0001] The invention relates to the field of electromagnetic compatibility of high-voltage power transmission and transformation projects, in particular to a method for selecting impedance loading points for electromagnetic scattering of high-voltage overhead transmission lines. Background technique [0002] The electromagnetic scattering of the high-voltage overhead transmission line to the radio station is mainly from the induced current generated by the high-voltage overhead wire and the iron tower excited by the electromagnetic field of the radio signal. This induced current radiates electromagnetic waves to the space through the metal structure, and the radiated electromagnetic wave and the same frequency interference generated by the source signal Will change the amplitude and phase of the original radio signal. [0003] The method of reducing electromagnetic scattering of high-voltage transmission lines generally maintains a certain protective distance...
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Login to view more IPC IPC(8): G01R29/08
CPCG01R29/0814
Inventor 张建功干喆渊刘震寰赵军周兵陈豫朝
Owner CHINA ELECTRIC POWER RES INST
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