摘要
高压直流换流站交流滤波电容器的可听噪声严重超出了限制,需要对其可听噪声进行有效的控制。分别针对单台电容器和电容器塔提出了两种降噪措施:双底面型低噪声电容器和交错式电容器布置方式。首先,给出了双底面型低噪声电容器的设计理论和交错式布置方式的降噪理论及采用常规布置方式和交错布置方式的电容器塔的仿真计算。然后,分别对这两种降噪措施在消声室内进行了实验,实验结果表明它们能够有效地降低电容器可听噪声。最后得出结论:双底面型低噪声电容器比常规同型号电容器底面噪声降低约10dB;在电容器塔主要辐射面正对的区域,交错式电容器塔布置方式比正常布置方式能有效降低大面积方向性集中的高声级噪声。
Audible noise of the filter capacitors in the HVDC converter station is severe and exceeds the noise level limit,and therefore needs to be reduced.Two audible noise reduction measures,double-bottom capacitor and overlap placement of capacitors,are proposed for a capacitor and capacitor stack respectively.Firstly,theory of designing double-bottom capacitor and simulation of sound fields about capacitor stack with regular placement and overlap placement are given.Secondly,some experiment on comparing audible noise reduction measures with regular condition are done and results validate that these measures could be effective to reduce audible noise of filter capacitors.The reduction are about 10dB of double-bottom capacitor and the overlap placement of capacitors can reduce audible noise in the main radiation zone.
出处
《电工技术学报》
EI
CSCD
北大核心
2011年第1期162-169,共8页
Transactions of China Electrotechnical Society
基金
国家科技支撑计划(2006BAA02123)
国家自然科学基金(50907046)资助项目
关键词
换流站
可听噪声
滤波电容器
降噪措施
HVDC converter station
audible noise
filter capacitor
audible noise reduction measure
