Switchgear microcomputer harmonic elimination apparatus

Abstract

The invention discloses a switchgear microcomputer harmonic elimination apparatus, and relates to the field of an electrical technology. The switchgear microcomputer harmonic elimination apparatus comprises a single-chip microcomputer processing module, a signal acquisition module, a keyboard control module, an apparatus power module, a real-time monitoring module, a fault remembrance module, a Chinese LCD module, a trigger motion signal module, a display system information module, an alarm signal generation module and a communication function module. The signal acquisition module, the keyboard control module, the apparatus power module, the real-time monitoring module, the fault remembrance module, the Chinese LCD module, the trigger motion signal module, the display system information module, the alarm signal generation module and the communication function module are respectively connected with the single-chip microcomputer processing module. According to the invention, a conventional secondary harmonic elimination mode of accessing a bulb or a damping resistor at the triangle of a PT opening is replaced, and multiple devices such as a voltage meter, a grounding indicator, an overvoltage fault detection device, a power network resonance detection device, a fault remembrance recorder, a system information acquisition meter, an alarm, a communication meter and the like are saved.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a microcomputer harmonic elimination device for a switch cabinet. Background technique [0002] The traditional secondary harmonic elimination uses a light bulb or damping resistor connected to the PT opening triangle to damp the resonance energy, but there are problems such as the inability to judge the resonance frequency, the inability to display the opening voltage, and zero-sequence loss. Existing voltmeter signal collection, grounding indicator, overvoltage fault detection, power grid resonance detection, fault memory recorder, system information collection table, alarm, communication table and other products need to be assembled and used separately when used in the system. It brings inconvenience to the user, and takes up a large space, and it is also inconvenient to move. Contents of the invention [0003] The technical problem to be solved by the present invention...

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Problems solved by technology

[0002] The traditional secondary harmonic elimination uses a light bulb or damping resistor connected to the PT opening triangle to damp the resonance energy, but there are problems such as the inability to judge the resonance frequency, the inability to display the opening voltage, and zero-sequence loss.

Existing voltmeter signal acquisition, grounding indicator, overvoltage fault detection, grid resonance detection, fault memory recorder, system information collection meter, alarm, communication meter and other products need to be assembled and used separately when used in the system. It is inconvenient for users, and it takes up a lot of space, and it is inconvenient to move

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