Dry-type transformer on-load tap-changer tester and detection method thereof

Abstract

The invention discloses a dry-type transformer on-load tap-changer tester and a detection method thereof. The dry-type transformer on-load tap-changer tester comprises a front shell and a rear shell,wherein the inner side wall of the front shell is fixedly connected with a button plate, the front surface of the button plate is slidably connected with six buttons, the inner side wall of the buttonplate is fixedly connected with four wiring holes, and a switch is hinged to the inner side wall of the button plate. The coupling phenomenon of impedance, capacitive reactance and an electromagneticfield of the PCB and the signal processor to impedance, capacitive reactance and an electromagnetic field of an external transformer is isolated through using a high-permeability box, so that the anti-interference capability is improved; surge voltage generated when nearby equipment is put into work and peak voltage of a main power supply are absorbed through a filter, and radiation interferencefrom conduction of the frequency converter is effectively reduced; and the whole device can effectively absorb shock and prevent falling through the rubber outer cover, meanwhile, the tripod can alsoprovide supporting force for the whole device during working, and different using effects are achieved.

Description

technical field [0001] The invention relates to the technical field of dry-type transformers, in particular to a dry-type transformer on-load tap changer tester and a detection method thereof. Background technique [0002] The on-load tap changer of a dry-type transformer refers to a voltage regulating device suitable for operating under transformer excitation or load to change the tap connection position of the transformer winding; its basic principle is to ensure that the load current is not interrupted. In order to achieve the switch between the taps in the transformer winding, thereby changing the number of turns of the winding, that is, the voltage ratio of the transformer, and finally achieve the purpose of voltage regulation; and according to relevant regulations, the on-load tap-changer must be regularly tested with a dedicated switch instrument for safety monitoring; [0003] The tester in the traditional technology is controlled by a computer, and through a specia...

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Problems solved by technology

[0003] The tester in the traditional technology is controlled by a computer, and through a specially designed measurement circuit, the measurement of parameters such as the transition time, transition waveform, transition resistance, and three-phase synchronicity of the on-load tap-changer can be realized; in the traditional tester device Among them, due to the principle of electromagnetic induction, there are inductive reactance and capacitive reactance between all electrical components and the components inside the dry-type transformer, between the lines and the ground, and then generate electromagnetic fields; in large-scale transformer occasions A variety of electromagnetic fields will converge into a strong interference magnetic field, which will easily cause interference to the electrical measurement components inside the device, thereby making the measurement data inaccurate

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