Abstract The noise of filter capacitors in high voltage direct current (HVDC) transmission converter stations has raised wide concern. In this paper the influence of residual charges on the surface of dielectric film on the vibration of capacitors is studied by experiments and simulation. A component of filter capacitor is made by enwinding two aluminum foils between them with three layers polypropylene films, and pressed into a rectangular plate form, then packed by insulation paper. A stack of filter capacitor consisted of some components in series or parallel connection. An electrometer is used to test the electric potentials under the unfolded one layer of dielectric film of a component of capacitor, and the residual charge densities of the dielectric film are calculated by means of the measured electric potentials. The results show that the residual charge density distribution on dielectric film is uneven and irregular. The electric field force of the dielectric film with residual charges of different orders of magnitude is simulated by using finite element software. Finally, a programmable power supply is used to apply sinusoidal voltage with different amplitude to a capacitor component, and the vibration of the component surface is tested by a laser vibration meter. The test results show that the residual charges on the dielectric film have significant impact on the vibration of capacitor component.

中文翻译：

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残余电荷对滤波电容元件振动的影响

摘要 高压直流输电换流站滤波电容器噪声引起广泛关注。本文通过实验和仿真研究了介质膜表面残留电荷对电容器振动的影响。滤波电容器的组成部分是用三层聚丙烯薄膜在两铝箔之间缠绕，压成矩形板状，再用绝缘纸包装而成。一组滤波电容由一些元件串联或并联组成。用静电计测试电容器组件展开的一层介电膜下的电位，并根据测得的电位计算介电膜的残余电荷密度。结果表明，介质膜上的残余电荷密度分布不​​均匀且不规则。利用有限元软件模拟了具有不同数量级残余电荷的介电薄膜的电场力。最后，利用可编程电源向电容元件施加不同幅值的正弦电压，通过激光测振仪测试元件表面的振动。测试结果表明，介质膜上的残留电荷对电容器元件的振动有显着影响。用可编程电源向电容元件施加不同幅值的正弦电压，用激光测振仪测试元件表面的振动。测试结果表明，介质膜上的残留电荷对电容器元件的振动有显着影响。用可编程电源向电容元件施加不同幅值的正弦电压，用激光测振仪测试元件表面的振动。测试结果表明，介质膜上的残留电荷对电容器元件的振动有显着影响。