Corona-cage-test-based method and system for obtaining audible noises below high-voltage direct-current power transmission split lead

A technology of high-voltage direct current transmission and split wires, which is applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve the problem of direct conversion of audible noise data to actual lines, and restrict the research and test methods of audible noise in DC lines issues of immaturity

Inactive Publication Date: 2016-12-14
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0006] However, unlike AC corona cages, the test method for audible noise tests using DC corona cages is not yet mature, and the existence of ion current effects and its unidirectional movement characteristics also lead to the particularity of a...

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  • Corona-cage-test-based method and system for obtaining audible noises below high-voltage direct-current power transmission split lead
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  • Corona-cage-test-based method and system for obtaining audible noises below high-voltage direct-current power transmission split lead

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[0061] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0062] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention provides a corona-cage-test-based method and system for obtaining audible noises below a high-voltage direct-current power transmission split lead. A split lead erected in a corona cage is used for measuring audible noises; a function relation between audible noise generation power and a lead surface field intensity is obtained; and on the basis of the function relation, audible noises at an observation point below the lead in the practical line are calculated. On the basis of the technology in the prior art, data of a corona cage are converted to the practical line and thus the reference is provided for the ultra-high-voltage direct-current line design. The method comprises: a high-voltage direct-current power transmission split lead is erected in a corona cage; a series of voltages are loaded at the lead; audible noises are measured at the wall or outside of the corona cage; the measured data are calculated to obtain the function relation A0=f(E) between the audible noise generation power and the lead surface field intensity of the testing lead; and the audible noises below the practical line is calculated based on the function relation, obtained by the corona cage, between the audible noise generation power and the lead surface field intensity.

Description

technical field [0001] The present invention relates to the field of high-voltage circuits, and more particularly, relates to a method and system for obtaining audible noise under split conductors for high-voltage direct current transmission using a corona cage experiment. Background technique [0002] my country is the first in the world to research and successfully build a ±800kV UHV DC transmission project, and will further research and develop a ±1100kV UHV DC transmission project. With the increase of voltage level, audible noise has become an important factor restricting the selection of UHV DC line conductors and environmental protection acceptance. [0003] With the rapid development of my country's UHV power grid, the electromagnetic environment test research based on UHV corona cage has started. The State Grid Corporation of China has built the world's largest outdoor corona cage at the Beijing UHV DC Test Base for research on the corona characteristics of UHV DC ...

Claims

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Application Information

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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 刘元庆张喜润陆家榆邓义茂杨志超
Owner CHINA ELECTRIC POWER RES INST
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