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Method for determining protection space between ultra-high-voltage DC (direct current) transmission line and wireless station

A technology for UHV DC and transmission lines, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., and can solve problems such as calculation deviation and calculation result deviation.

Inactive Publication Date: 2012-05-02
STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

[0007] 3) From the calculation process of the passive interference level of the line model, the discretization of the induced current by the pulse basis function will also cause calculation deviations
Obviously, the higher the frequency, the more the number of overthick line units with standing wave current will be, resulting in larger and larger deviations in the calculation results

Method used

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  • Method for determining protection space between ultra-high-voltage DC (direct current) transmission line and wireless station
  • Method for determining protection space between ultra-high-voltage DC (direct current) transmission line and wireless station
  • Method for determining protection space between ultra-high-voltage DC (direct current) transmission line and wireless station

Examples

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Embodiment

[0054] The simulation surface model of a typical iron tower of my country's UHV DC transmission line ±800kV transmission line is as follows: image 3 shown.

[0055] Among various types of stations, AM radio stations are the most closely related to daily life. Taking the AM radio station as an example, the invention is used to calculate the interference level of the power transmission line to the AM radio station in my country.

[0056] If the AM radio station is too close to the high-voltage transmission line, it is susceptible to the shielding effect of the metal pole tower and the wire, which will cause the incoming wave signal to weaken and reduce the radio sensitivity. Therefore, by comparing the strength of the signal received by the radio antenna with and without the transmission line , to investigate the effect of passive interference. The electromagnetic interference impact of passive radio interference on a transmitting antenna or passive radio interference on a re...

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Abstract

The invention relates to a method for determining the protection space between an ultra-high-voltage DC (direct current) transmission line and a wireless station. The method comprises the methods of constructing a passive jamming line-surface model of an ultra-high-voltage DC transmission line and solving an electric field integral equation corresponding to the model. The method comprises the following steps: firstly, constructing a passive jamming simulation surface model of the line according to the real space truss structure of transmission towers of the line, and constructing the passive jamming line-surface model of the transmission line in combination with the line model of an overhead wire and ground wire; solving induced current of each part of the ultra-high-voltage DC transmission line by using a moment method checked by RWG (Rao-Wilton- Glisson) basis function and Galerkin method, and calculating secondary radiation intensity vector generated by the induced current; and superposing the vector with a source electromagnetic filed to obtain the jamming level of the ultra-high-voltage DC transmission line to the wireless station. Comparison of test data obtained through the test proves that the method provided by the invention has higher accuracy, and can be used for accurately determining the passive jamming protection space between high-voltage transmission line and adjacent wireless stations in the future.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility of high-voltage power transmission and transformation engineering, and specifically relates to a method for determining the protective distance between a ±800kV UHV DC transmission line and a wireless station. Background technique [0002] In order to meet the electricity demand for the sustainable development of my country's economy and society, the construction of a strengthened power grid with UHV power grid as the core has become a strategic goal of national power construction. When long-distance and large-capacity transmission is adopted, UHV transmission can effectively save line corridors, help improve network structure, reduce transmission bottlenecks, and achieve a wide range of resource optimization. The economic and social benefits are very obvious. However, the electromagnetic environment of UHV is different from that of 500kV lines. There is no national standard for the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 邬雄张建功唐波干喆渊刘兴发
Owner STATE GRID ELECTRIC POWER RES INST
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