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High tension transmission line comprehensive tester and testing method

A high-voltage transmission line and comprehensive tester technology, applied in the direction of fault location, etc., can solve the problems of line induced voltage and current that cannot be tested safely and accurately, and achieve powerful data processing capabilities, high anti-interference ability, and good shockproof performance.

Active Publication Date: 2014-10-15
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a comprehensive tester for high-voltage transmission lines, which solves the problem that the newly-built and reconstructed lines cannot be tested safely and accurately due to the influence of induced voltage and current. Provide accurate data, protect and ensure the safe and reliable operation of the power system

Method used

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  • High tension transmission line comprehensive tester and testing method
  • High tension transmission line comprehensive tester and testing method
  • High tension transmission line comprehensive tester and testing method

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Embodiment

[0030] Such as figure 1 As shown, the data test and calculation unit is set in the instrument, and the data test and calculation unit is connected to the power supply module, PWM control unit, DC constant voltage and constant current source, impedance matching unit, standard resistance, measured circuit resistance, relay control unit, storage and printing unit , display unit and keyboard; PWM control unit, DC constant voltage and constant current source, power filter unit, impedance matching unit, measured line resistance and standard resistance are connected in sequence; the relay control unit is connected to the interference voltage detection unit and impedance matching unit; the interference voltage The detection unit and the standard resistance are grounded; the two ends of the measured line resistance are connected to the overvoltage protection unit.

[0031] The data test calculation unit adopts a 32-bit high-speed processor; the overvoltage protection unit is a low-volt...

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Abstract

The invention relates to a high tension transmission line comprehensive tester which is structurally characterized in that a data testing calculation unit is connected with a power supply module, a pulse width modulation (PWM) control unit, a direct current constant voltage constant current source, an impedance matching unit, a standard resistor, a measured line resistor, a relay control unit, a storage and printing unit, a display unit and a keyboard. The PWM control unit, the direct current constant voltage constant current source, a power supply filtering unit, the impedance matching unit, the measured line resistor and a standard resistor are sequentially connected. The relay control unit is connected with an interference voltage detection unit and the impedance matching unit. The resistance-capacitance voltage dividing principle is utilized to measure the static induction voltage under 20kV, a disperse Fourier development technology is adopted to test line loop resistance, digital filtering is utilized to remove alternating current components, only direct current components are measured, and direct current voltage of the line can be still measured accurately after alternating current is overlapped. The tester provides accurate data for fixed value setting of a line automatic device and ensures that a power system runs safely and reliably.

Description

technical field [0001] The invention relates to on-site debugging of power system equipment, in particular to a high-voltage transmission line comprehensive tester and a testing method, which are mainly used for testing high-voltage transmission line induced voltage, induced current and loop resistance, and belong to the field of electric power applications. Background technique [0002] In recent years, there have been many new and reconstructed lines in various regions. Due to the influence of electrification at the adjacent intervals between the beginning and end substations of the line and the erection and crossing of lines above 66kV on the same pole, high induced voltage and induced current are generated between transmission lines. Due to the influence of induced voltage and induced current, the test equipment is often damaged and the test data is seriously deviated, so it cannot provide true and effective test results. Contents of the invention [0003] Aiming at t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
Inventor 岳程城董军郭岚黄东伟石峰陈晶阳裴玉杰高崴龚晨斌刘新武英明金敏曹慧杰徐建国徐波顾孟山柏忠斌李思民何江陈凤军李晗王红艳张莉臧雷默李莹玺李忠南洋郎东岩郝文峰任东霞路天峰马国海田华
Owner STATE GRID CORP OF CHINA
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