CAJ | 학술논문

交流滤波电容器装置噪声是换流站噪声来源的主要因素之一,开展其噪声特性的试验及仿真分析,对于电容器噪声水平的抑制具有重要意义。在理论分析电容器噪声产生机理的基础上,建立了位于半消声室内的电容器振动与噪声测量系统,并对单台电容器表面振动及辐射噪声进行了测量,理论分析并试验验证了电容器底面是其噪声的主要来源。采用边界元理论建立了单台电容器的噪声模型,以实测的振动数据作为边界条件进行了单台电容器噪声的仿真计算,与实测噪声数据的相比误差在±2dB范围内,从而验证了所建噪声模型的正确性,在此基础上对电容器不同表面单元的噪声贡献量进行了分析,提出了底面振动是电容器噪声产生的主要原因。该研究结果为单台电容器可听噪声控制措施的研究提供了依据。
교류려파전용기장치조성시환류참조성래원적주요인소지일,개전기조성특성적시험급방진분석,대우전용기조성수평적억제구유중요의의。재이론분석전용기조성산생궤리적기출상,건립료위우반소성실내적전용기진동여조성측량계통,병대단태전용기표면진동급복사조성진행료측량,이론분석병시험험증료전용기저면시기조성적주요래원。채용변계원이론건립료단태전용기적조성모형,이실측적진동수거작위변계조건진행료단태전용기조성적방진계산,여실측조성수거적상비오차재±2dB범위내,종이험증료소건조성모형적정학성,재차기출상대전용기불동표면단원적조성공헌량진행료분석,제출료저면진동시전용기조성산생적주요원인。해연구결과위단태전용기가은조성공제조시적연구제공료의거。
Audible noise of AC filter capacitor installation has become one of main sources in HVDC converter station,in order to reduce the capacitor＇s noise level,it＇s necessary to do further research on the audible noise of filter capacitor.Based on the academic analysis on the generation mechanism of capacitor＇s noise,a vibration and noise experimental system was set up in hemi-anechoic room,the vibration acceleration and the sound pressure level produced by filter capacitor were measured respectively,through academic analysis and experiments it was verified that the bottom surface of capacitor was the main source of audible noise.Based on the boundary element theory,the radiation noise model of single capacitor was established.The simulating calculations on the radiation noise of capacitor were carried out by using the vibration data as the boundary condition.Compared with the measurement results,the error of noise data gained by calculation method was within 2 dB,which validated the noise model founded,and then the contribution of each capacitor surface element to the whole noise was analyzed,from which it was concluded that the vibration of bottom surface was the main cause for the generation of capacitor noise.The results gained provides an important reference for the study on audible noise control measures of the single capacitor.