Device and method for improving box-in structure for noise reduction of converter transformers in operation

Abstract

The invention discloses a device and method for improving a BOX-IN structure used for reducing noises of a converter transformer put into operation. The device and the method have the beneficial effects that a cooler is moved forward by lengthened converter transformer oil inlet and outlet connecting pipes to provide space for arranging a front panel of an acoustic shield body, thus optimizing the air inlet distance of the cooler while ensuring the inspection and maintenance space between the cooler and a converter transformer body; the heat dissipation effects of the converter transformer can be effectively improved by the measures of arranging a mechanical ventilation system and increasing the cooler capacity; the noises of the converter transformer put into operation are reduced under the condition of satisfying ventilation and heat dissipation, electrical safe distance and operation, maintenance and inspection of the converter transformer, thus solving the problem that the noises of the converter transformer put into operation disturb residents and also solving the problem that the cooling effects do not conform to relevant requirements due to aging of the converter transformer and other reasons; and thus, the device and the method have good environmental and social benefits.

Description

Technical field: [0001] The invention relates to the technical field of noise control and management, in particular to a device and method for improving the BOX-IN structure for noise reduction of a converter transformer in operation. Background technique: [0002] At present, the noise nuisance problem of the converter station is gradually emerging. Noise sources in converter stations include converter converters, smoothing reactors, AC filter banks, valve cooling towers, transformers, etc. Among them, the commutation becomes the main noise source. The "BOX-IN" noise reduction technology uses the firewall on both sides of the converter transformer and the valve hall wall to conduct closed sound insulation treatment on the transformer body, which can effectively reduce the impact of converter transformer noise on the surrounding environment. [0003] At present, domestic converter transformer "BOX-IN" noise reduction technologies mainly include: [0004] (1) "BOX-IN" nois...

AI Technical Summary

Problems solved by technology

[0007] 1. The distance between the converter transformer body and the cooler is too small, and the installation of a sound-absorbing front panel between them will affect the air intake of the cooler and occupy the maintenance space

[0008] 2. For converter transformers that have not improved the structure for "BOX-IN", the height of the neutral point bushing is generally low. Casing lead wires are generally bare wires, protruding from the sound-absorbing and sound-insulating top cover, and holes of a certain size need to be set at the interface, and a certain distance should be kept between the lead wire and the top cover to meet the requirements of electrical safety distance

But the opening will cause sound leakage, which will affect the noise reduction effect of "BOX-IN"

[0009] 3. The structure of the converter transformer has been finalized, and the sound insulation top cover is arranged flush. The electrical safety, fire protection, operation and maintenance of the converter transformer do not meet the relevant requirements

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