A Climate Correction Method for Radio Interference and Audible Noise of DC Transmission Lines

A DC transmission line, radio interference technology, applied in the correction field, can solve problems such as corona discharge radio interference and audible noise effects, and achieve the effects of ensuring environmental friendliness, accurate empirical formulas, and a wide range of applications

Active Publication Date: 2016-01-20
CHINA ELECTRIC POWER RES INST +1
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The corona discharge of DC transmission lines is easily affected by environmental factors. Under different humidity and wind speed, the process of corona discharge will be affected, and the radio interference and audible noise generated by corona discharge will be affected.

Method used

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  • A Climate Correction Method for Radio Interference and Audible Noise of DC Transmission Lines
  • A Climate Correction Method for Radio Interference and Audible Noise of DC Transmission Lines
  • A Climate Correction Method for Radio Interference and Audible Noise of DC Transmission Lines

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Embodiment Construction

[0031] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] Such as figure 1 as shown, figure 1 It is a flow chart of the climate correction method for radio interference and audible noise of direct current transmission lines provided by the present invention, and the measuring instruments and measuring systems used in the method include radio interference measuring instruments and noise measuring systems.

[0033] Radio interference measuring instruments include ESPI3 receiver and HFH2-Z2 loop active antenna produced by Rohde Schwarz. The loop active antenna is connected with the receiver through a signal cable; the receiver is connected with a computer through a network cable. The loop active antenna is used to receive the radio signal, convert it into a voltage signal, and transmit it to the receiver through the signal cable. The receiver restores the voltage signal t...

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Abstract

The invention relates to a climate correcting method of radio disturbance and audible noise of a direct current transmission line. A measuring system used in the method comprises a radio disturbance measuring instrument and a noise measuring system instrument, and the radio disturbance measuring instrument and the noise measuring system instrument are both connected with a computer through reticle. The method comprises the following steps that A the radio disturbance measuring instrument and the noise measuring system instrument respectively receive radio signals and noise signals; B the radio disturbance signals and the noise signals are respectively converted into electrical signals; C the radio disturbance signals and the noise signals are respectively restored into a radio disturbance level and a noise level; D the radio disturbance level and the audible noise level are monitored respectively; and E modification values of the radio disturbance level and the noise level along wind speed and humidity changes are obtained through statistic analysis. The climate correcting method is used for correcting the radio disturbance and the audible noise according to different environment humidity and wind speeds, enables an empirical formula to be accurate and wide in applicable scope and guarantees environmentally friendly of the direct current transmission line.

Description

technical field [0001] The invention relates to a correction method, in particular to a climate correction method for radio interference and audible noise of direct current transmission lines. Background technique [0002] When the DC transmission line is running, corona discharge will be generated. During the corona discharge process, low-frequency (0.15MHz-30MHz) electromagnetic waves will be radiated to the outside world through the wires, which may affect nearby radios listening to broadcast signals in the corresponding frequency band and radio communications in similar frequency bands. Corona discharge produces audible noise at the same time, affecting the normal life of residents. Therefore, the radio interference and audible noise generated by DC transmission lines are limited in the corresponding national standards. [0003] The corona discharge of DC transmission lines is easily affected by environmental factors. Under different humidity and wind speed, the process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 赵鹏郭剑赵录兴韩辉
Owner CHINA ELECTRIC POWER RES INST
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