Electron type current transformer for ultrahigh voltage transmission lines and corona loss measurement device thereof

Abstract

A ultra-high voltage transmission line electron type current transformer and the corona loss measurement device, including an electron type current transformer 1.3, a ultra-high voltage capacitance type voltage transformer 1.4, a second divided voltage core loop 1.9 and an industrial control computer, wherein the electron type current transformer 1.3 includes a resistance sample unit 2.1, a distance module 2.2, an optical fiber compound insulator 2.7 and a local module 2.8, and the resistance sample unit 2.1 is electrically connected with the distance module 2.2, while the distance module 2.2 is optically connected with the local module 2.8 through the optical fiber compound insulator 2.7; the output of the local module 2.8 is connected with the DAQ-2006 data acquisition card of the industrial control computer; the resistance sample unit 2.1 and the distance module 2.2 are hung at the start end of the phase conduct; the ultra-high voltage capacitance type voltage transformer 1.4 on the bushing line outgoing end of the ultra-high voltage transformer 1.1, wherein the secondary winding connection end of the middle transformer is electrically connected with the second divided voltage core loop 1.9, the output signal of which is performed with the electrical transformation / optical transformation, and is transmitted to the local module 2.8 for voltage measurement, then is collected by the DAQ-2006 data acquisition card of the industrial control computer, which has high measurement accuracy, no insulation, convenient operation, no safety hidden trouble.

Description

technical field

[0001] The invention belongs to the field of high-voltage measurement of transmission lines, and relates to a corona loss measurement device, in particular to a corona loss measurement device for UHV transmission lines, which is suitable for long-term monitoring of corona loss of 1000kV voltage level transmission lines The measurement and evaluation of the power loss of the 1000kV voltage level transmission line is also of great significance to the selection of the conductor structure of the UHV transmission line. Background technique

[0002] When the electric field strength around the wires of the transmission line exceeds the breakdown field strength of the air, the air near the wires is ionized to form a corona discharge. The charged ions produced by corona discharge move back and forth around the wire under the action of alternating voltage, accompanied by air ionization and light and radio interference. The energy consumed by these effects is collective...

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