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Radio interference exciting functions for conductors of ultrahigh-voltage transmission line and determining method for radio interference exciting functions

A radio interference and excitation function technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of differences in environmental influencing factors, and achieve the effect of saving project cost and huge social and economic value

Inactive Publication Date: 2012-06-20
STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

Since the structure and production process of the test wires were inconsistent with those of the existing wires at that time, and there were differences in environmental factors during the test, it was not possible to simply apply the excitation function for calculation

Method used

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  • Radio interference exciting functions for conductors of ultrahigh-voltage transmission line and determining method for radio interference exciting functions
  • Radio interference exciting functions for conductors of ultrahigh-voltage transmission line and determining method for radio interference exciting functions
  • Radio interference exciting functions for conductors of ultrahigh-voltage transmission line and determining method for radio interference exciting functions

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0026] ① It is economically impractical to set up a long test line and frequently replace the test lead to study the corona effect of different split-type conductors. Therefore, the present invention uses a UHV corona cage to apply a lower voltage to reproduce the corona discharge state of the actual UHV AC transmission wire, and obtains the radio frequency current of the split wire from the corona cage test.

[0027] Corona cages are usually placed in the center of the test conductor to simulate a single or multiple split conductors in a transmission line. The outer wall of the corona cage is a concentric mesh metal cage with a much larger radius and a circular or square cross section. The cage wall is grounded with a small resistor through the measurement. Due to the close distance between the cage wall and the wire, a high field strength can be gene...

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Abstract

The invention discloses radio interference exciting functions for a 10 split conductor and a 12 split conductor of an ultrahigh-voltage transmission line and a determining method for the radio interference exciting functions. The determining method for the radio interference exciting functions comprises the following steps of: through an ultrahigh-voltage corona cage test, researching corona properties of the 10 split conductor and the 12 split conductor in good weather and on heavily raining days; obtaining the corona properties of various split conductors under the two weather conditions respectively; establishing respective radio interference exciting functions of the various split conductors and altitude revision factors of the radio interference exciting functions by applying a statistic analysis method, a physical method and a mathematic method; and determining the relationship between the exciting functions and conductor structures, and the relationship between the split number and diameters of subconductors and other parameters. Proved by comparing test data, the exciting functions are suitable for characteristics of the transmission line in China and are applicable for pre-testing radio interference of the split conductors of the ultrahigh-voltage transmission line from now on so as to instruct the design of the conductor structures of an ultrahigh-voltage transmission line in the future.

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 radio interference excitation function of 10 split wires and 12 split wires of an UHV transmission line and a determination method thereof. Background technique [0002] With the progress of society, the capacity of the power grid is increasing day by day, and the voltage level of the transmission line has developed to the UHV stage, which leads to the radio interference generated by the transmission line becoming stronger and stronger, making the radio interference level a key factor in the design and construction of high-voltage power transmission and transformation projects. One of the dominant controlling factors. Therefore, establishing an accurate calculation model to predict the radio interference level of transmission lines is a necessary condition to ensure that the power grid construction meets...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 邬雄裴春明路遥谢辉春倪园
Owner STATE GRID ELECTRIC POWER RES INST
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