Abstract
Audible noise of the filter capacitors in the HVDC converter station is severe and as loud as the converter transformer and, therefore, needs to be reduced. A microperforated-panel (MPP) absorber can be used because of its fibre-free nature and attractive appearance. In this paper, based on the mechanism of sound generation of capacitors and the electroacoustical equivalent circuit model of the MPP absorber, the MPP absorber for noise reduction of the filter capacitor in the HVDC converter station is first proposed, and then it is designed and installed at the bottom of the capacitor. An audible noise experiment of the capacitor with the MPP absorber is performed and compared with a regular capacitor's. The results validate that the MPP absorber is effective to reduce audible noise of the filter capacitors.
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