Study on Characteristic of Perforated Plate for Capacitor Audible Noise Reduction

KONG Dexin; WANG Yuntao

doi:10.14044/j.1674-1757.pcrpc.2019.03.013

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Study on Characteristic of Perforated Plate for Capacitor Audible Noise Reduction

更新时间：2024-09-14

- Study on Characteristic of Perforated Plate for Capacitor Audible Noise Reduction
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 40, Issue 3, Pages: 70-73(2019)
- 作者机构：
  
  西安西电电力电容器有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2019.03.013
  CLC： TM53
- Published：2019，
- 稿件说明：
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[1]孔德新,王云涛.用于电容器降噪的穿孔板特性研究[J].电力电容器与无功补偿,2019,40(03):70-73+83.

KONG DEXIN, WANG YUNTAO. Study on Characteristic of Perforated Plate for Capacitor Audible Noise Reduction. [J]. Power capacitor & reactive power compensation, 2019, 40(3): 70-73.
[1]孔德新,王云涛.用于电容器降噪的穿孔板特性研究[J].电力电容器与无功补偿,2019,40(03):70-73+83. DOI： 10.14044/j.1674-1757.pcrpc.2019.03.013.

KONG DEXIN, WANG YUNTAO. Study on Characteristic of Perforated Plate for Capacitor Audible Noise Reduction. [J]. Power capacitor & reactive power compensation, 2019, 40(3): 70-73. DOI： 10.14044/j.1674-1757.pcrpc.2019.03.013.

摘要

交流滤波电容器可听噪音是换流站中主要噪声来源之一

为进一步降低电容器的噪声水平

本文在对电容器噪声频率特性进行分析的基础上

提出了一种加装在电容器底部的穿孔板降噪结构。通过调节穿孔板声阻抗对穿孔板的共振频率进行控制

达到消除某频段噪声的目的。经过实验验证

当电容器加载的高次谐波电流在某一频率特别突出的情况下

穿孔板抑制这一激励产生的噪声效果最为明显。最佳效果可将底部方向的声压级降低14 dB

电容器平均声压级降低约5 dB。

Abstract

The audible noise of the filter capacitors is one of the main noise sources in the convertorstation.For reducing the noise level of the capacitor further

in this paper

a kind of noise reduction structure of perforated plate which is mounted at the bottom of the capacitor is proposed on the basis of analysis of the noise frequency feature of the capacitor.The resonance frequency of the perforated plate is controlled by way of adjusting acoustic impedance of the perforated plate with purpose of eliminating the noise of certain section of frequency. It is proved by the experiment that in case of particularly high ultra-harmonic current at certain frequency loaded by capacitor

the result of suppressing the noise generated by the excitation to be suppressed by the perforated plate is remarkable.The best result is the noise level at bottom can be reduced by14 dB and the average noise level of the capacitor can be reduced by 5 dB.

关键词

滤波电容器噪声穿孔板噪声控制

Keywords

filter capacitornoiseperforated platenoise control

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