High tension transmission line comprehensive tester and testing method

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...

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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

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