Wideband online measuring system for corona current of high-voltage transmission line

Abstract

The invention relates to a wideband online measuring system for corona current of a high-voltage transmission line, belonging to the technical field of high-voltage testing devices and measurement. The system comprises a remote unit, a local unit and a terminal computer, wherein the remote unit is used for acquiring the corona current I of the high-voltage transmission line, conducting analog-to-digital conversion to the corona current I to obtain a digital signal and transmitting the digital signal to the local unit through radio wave; the local unit is used for receiving the digital signal of the remote unit and transmitting the digital signal to the terminal computer; and the terminal computer is used for receiving the digital signal of the local unit, displaying and storing the waveform of the corona current of the high-voltage transmission line, and completing data storage and analysis. The measuring system can measure the corona current of a AC or DC line on line at high voltage; and since the wireless data transmission is adopted, no external insulation problem exists and the measuring system can run on line for long period in a hostile natural environment and an electromagnetic environment. The invention provides a reliable means for the deep analysis of the corona of the transmission line.

Description

technical field [0001] The invention relates to a broadband on-line measurement system for corona current of a high-voltage transmission line, which belongs to the field of high-voltage test equipment and measurement technology. Background technique [0002] The corona phenomenon of high-voltage transmission lines is a key technical issue that needs to be considered in engineering design, construction and operation. On the one hand, corona will cause power loss and increase the cost of power transmission. On the other hand, the radio interference, audible noise and space ion flow generated by corona will affect the surrounding electromagnetic environment. When corona occurs on the DC line, according to the occurrence of ionization, the entire space except the wire can be divided into two parts: the ionized area and the non-ionized area. The movement of charged ions in the ionized area and the non-ionized area forms the corona current on the transmission line. Corona curren...

AI Technical Summary

Problems solved by technology

However, the manufacture and installation of insulation devices of this type of equipment are complicated and costly, and it is difficult to flexibly apply them in the field of outdoor testing or online testing

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