With the continuous improvement of people’s environmental awareness

the ambient noisearound HVDC converter station is becoming more and more concerned. The noise of the AC filter in the con-verter station is one of important problems and the noise reduction renovation for AC filter is one of the waysto solve the noise problem of the converter station. In this paper

tracking and testing of noise sound pres-sure level for DT12/24 AC filter bank at certain ±500 kV converter station of Southern Power Grid is per-formed

with focus on the test and analysis of noise at direction of the bushing of capacitor unit for the filtercapacitor tower. It is shown by the test result that the nose reduction renovation for DT12/24 AC filter bankcan effectively reduce the AC filter field and ambient noise level

and its result can provide basic data sup-port for the noise reduction design and renovation of filter.