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Dry-type air-core filter reactor is one of the main noise sources in converter station of HVDC. It is not easy to accurately grasp the noise level and noise distribution characteristics of the reactor by using the methods specified in the existing standards to measure the noise of the reactor. On the basis of reference to the existing methods, the layout of noise measuring points is designed, and the circumferential noise and radial noise of a filter reactor are measured. According to the analysis of the circumferential noise data of the reactor, the circumferential noise distribution of the reactor at the same height presents periodic variation. The average A-weighted sound pressure level of the circumferential noise at different heights is consistent under the premise of dense measuring points. The analysis of the radial noise data shows that the radial noise distribution of the reactor is related to the frequency of the excitation current, and the radial noise of the measuring point increases with the amplitude of the excitation current. The experimental results show that the arrangement and density of noise measuring points have influence on the accurate measurement of the noise of the filter reactor.
Inspec keywords: HVDC power transmission; noise pollution; noise measurement; reactors (electric); acoustic noise; acoustic noise measurement; noise
Subjects: Other topics in statistics; Transformers and reactors; d.c. transmission