Dry-type hollow filter reactor

Abstract

The invention discloses a dry-type hollow filter reactor. The reactor comprises a main coil; an additional coil is disposed above the main coil; the main coil is wound by using a transposed conductor;the transposed conductor is formed by twisting multi-stranded monofilament wires with small cross sections; a fake encapsulation layer is disposed on an outer part of the main coil; a sound insulation cylinder is disposed on the peripheries of the main coil and the additional coil; the inner wall of the sound insulation cylinder is provided with glass fiber needled felt; the additional coil is wound by using an aluminum wire, a copper wire, an aluminum bar or a copper bar; a signboard is welded at a position where the number of turns of the additional coil is separated; and the additional coil and the main coil are connected through flexible connection. By adopting the dry-type hollow filter reactor disclosed by the invention, the vibration of the monofilament wires can be obviously reduced under the action of the electromagnetic field, the noise reduction effect is obvious, the two-fold noise reduction effect can be achieved with half the effort, the safe operation of the reactor isguaranteed, the reactor is simple to adjust and operate, the on-site crane operation is avoided, and the time and labor are saved.

Description

technical field [0001] The invention relates to a reactor in the electric power industry, in particular to a dry-type air-core filter reactor. Background technique [0002] In recent years, due to the advantages of large transmission capacity and long transmission distance, DC transmission is showing a trend of rapid development. The filter reactor is connected in series in the filter channel to filter out the harmonic current generated by the converter. Because of its harmonic current The content is huge, which makes the noise problem very prominent. In addition, there is an inductance adjustment situation, and an additional coil needs to be installed to adjust the inductance. The traditional noise reduction method is to install a sound insulation cover outside the reactor, and built-in sound-absorbing cotton for noise reduction. The moisture absorption and incomplete flame retardancy of the sound-absorbing material bring great hidden dangers to the safe operation of the re...

AI Technical Summary

Problems solved by technology

The traditional noise reduction method is to install a sound insulation cover outside the reactor, and built-in sound-absorbing cotton for noise reduction. The moisture absorption and incomplete flame retardancy of the sound-absorbing material bring great hidden dangers to the safe operation of the reactor.

At present, the mainstream inductance adjustment method is realized by using the upper and lower coils to adjust the gap distance and the mutual inductance. If this method needs to be adjusted, it needs the cooperation of the crane on site, and the upper and lower distances are not easy to control, which is prone to inductance deviation.

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