摘要
本文通过建立基于传声器的噪声测量系统,对我国目前在建或即将投运的±800 kV特高压直流工程的交流滤波器电容器单元的噪声进行了测量,研究谐波电流与电容器单元噪声之间的关系,提出并采用针对电容器单元的降噪措施,验证降噪措施的效果。研究结果表明,由于11次、13次谐波电流过大,BP11/13滤波电容器单元的噪声水平达65dB以上。采取加装吸音罩等外部降噪措施后,总体噪声水平可降低5dB以上。
In this paper, the noise of AC filter capacitor unit for ±800kV UHVDC project under con- struction or to be operated in China is measured through the noise measurement system which is set up on the basis of microphone , the relation between harmonic current and the noise of capacitor unit is studied. The noise reduction measures for the capacitor unit is proposed and adopted to verify the noise reduction result. It is shown by the study result that since the llth and 13th harmonic current is too big the noise level of BP11/13 filter capacitor unit reaches above 65 dB. And the total noise reduction level can be reduced above 5 dB after the addition of such external noise reduction measures as sound - absorbing enclosures
出处
《电力电容器与无功补偿》
北大核心
2017年第4期88-93,共6页
Power Capacitor & Reactive Power Compensation
关键词
电力电容器单元
谐波电流
电容器噪声
降噪措施
power capacitor unit
harmonic current
capacitor noise
noise reduction measures
